initial commit

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JellyApple102 2021-09-23 17:22:14 -04:00
commit cd87b70619
71 changed files with 14070 additions and 0 deletions

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[package]
name = "tree-sitter-dfraw"
description = "dfraw grammar for the tree-sitter parsing library"
version = "0.0.1"
keywords = ["incremental", "parsing", "dfraw"]
categories = ["parsing", "text-editors"]
repository = "https://github.com/tree-sitter/tree-sitter-dfraw"
edition = "2018"
license = "MIT"
build = "bindings/rust/build.rs"
include = [
"bindings/rust/*",
"grammar.js",
"queries/*",
"src/*",
]
[lib]
path = "bindings/rust/lib.rs"
[dependencies]
tree-sitter = "~0.20.0"
[build-dependencies]
cc = "1.0"

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binding.gyp Normal file
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{
"targets": [
{
"target_name": "tree_sitter_dfraw_binding",
"include_dirs": [
"<!(node -e \"require('nan')\")",
"src"
],
"sources": [
"bindings/node/binding.cc",
"src/parser.c",
# If your language uses an external scanner, add it here.
],
"cflags_c": [
"-std=c99",
]
}
]
}

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bindings/node/binding.cc Normal file
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#include "tree_sitter/parser.h"
#include <node.h>
#include "nan.h"
using namespace v8;
extern "C" TSLanguage * tree_sitter_dfraw();
namespace {
NAN_METHOD(New) {}
void Init(Local<Object> exports, Local<Object> module) {
Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
tpl->SetClassName(Nan::New("Language").ToLocalChecked());
tpl->InstanceTemplate()->SetInternalFieldCount(1);
Local<Function> constructor = Nan::GetFunction(tpl).ToLocalChecked();
Local<Object> instance = constructor->NewInstance(Nan::GetCurrentContext()).ToLocalChecked();
Nan::SetInternalFieldPointer(instance, 0, tree_sitter_dfraw());
Nan::Set(instance, Nan::New("name").ToLocalChecked(), Nan::New("dfraw").ToLocalChecked());
Nan::Set(module, Nan::New("exports").ToLocalChecked(), instance);
}
NODE_MODULE(tree_sitter_dfraw_binding, Init)
} // namespace

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bindings/node/index.js Normal file
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try {
module.exports = require("../../build/Release/tree_sitter_dfraw_binding");
} catch (error1) {
if (error1.code !== 'MODULE_NOT_FOUND') {
throw error1;
}
try {
module.exports = require("../../build/Debug/tree_sitter_dfraw_binding");
} catch (error2) {
if (error2.code !== 'MODULE_NOT_FOUND') {
throw error2;
}
throw error1
}
}
try {
module.exports.nodeTypeInfo = require("../../src/node-types.json");
} catch (_) {}

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bindings/rust/build.rs Normal file
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fn main() {
let src_dir = std::path::Path::new("src");
let mut c_config = cc::Build::new();
c_config.include(&src_dir);
c_config
.flag_if_supported("-Wno-unused-parameter")
.flag_if_supported("-Wno-unused-but-set-variable")
.flag_if_supported("-Wno-trigraphs");
let parser_path = src_dir.join("parser.c");
c_config.file(&parser_path);
// If your language uses an external scanner written in C,
// then include this block of code:
/*
let scanner_path = src_dir.join("scanner.c");
c_config.file(&scanner_path);
println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
*/
c_config.compile("parser");
println!("cargo:rerun-if-changed={}", parser_path.to_str().unwrap());
// If your language uses an external scanner written in C++,
// then include this block of code:
/*
let mut cpp_config = cc::Build::new();
cpp_config.cpp(true);
cpp_config.include(&src_dir);
cpp_config
.flag_if_supported("-Wno-unused-parameter")
.flag_if_supported("-Wno-unused-but-set-variable");
let scanner_path = src_dir.join("scanner.cc");
cpp_config.file(&scanner_path);
cpp_config.compile("scanner");
println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
*/
}

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bindings/rust/lib.rs Normal file
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//! This crate provides dfraw language support for the [tree-sitter][] parsing library.
//!
//! Typically, you will use the [language][language func] function to add this language to a
//! tree-sitter [Parser][], and then use the parser to parse some code:
//!
//! ```
//! let code = "";
//! let mut parser = tree_sitter::Parser::new();
//! parser.set_language(tree_sitter_dfraw::language()).expect("Error loading dfraw grammar");
//! let tree = parser.parse(code, None).unwrap();
//! ```
//!
//! [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
//! [language func]: fn.language.html
//! [Parser]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Parser.html
//! [tree-sitter]: https://tree-sitter.github.io/
use tree_sitter::Language;
extern "C" {
fn tree_sitter_dfraw() -> Language;
}
/// Get the tree-sitter [Language][] for this grammar.
///
/// [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
pub fn language() -> Language {
unsafe { tree_sitter_dfraw() }
}
/// The content of the [`node-types.json`][] file for this grammar.
///
/// [`node-types.json`]: https://tree-sitter.github.io/tree-sitter/using-parsers#static-node-types
pub const NODE_TYPES: &'static str = include_str!("../../src/node-types.json");
// Uncomment these to include any queries that this grammar contains
// pub const HIGHLIGHTS_QUERY: &'static str = include_str!("../../queries/highlights.scm");
// pub const INJECTIONS_QUERY: &'static str = include_str!("../../queries/injections.scm");
// pub const LOCALS_QUERY: &'static str = include_str!("../../queries/locals.scm");
// pub const TAGS_QUERY: &'static str = include_str!("../../queries/tags.scm");
#[cfg(test)]
mod tests {
#[test]
fn test_can_load_grammar() {
let mut parser = tree_sitter::Parser::new();
parser
.set_language(super::language())
.expect("Error loading dfraw language");
}
}

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grammar.js Normal file
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module.exports = grammar({
name: 'dfraw',
rules: {
source_file: $ => repeat($._statement),
_statement: $ => choice(
$.bracket_statement,
$.comment
),
bracket_statement: $ => seq(
'[',
$.parameter_list,
']'
),
parameter_list: $ => seq(
$.declaration,
optional($.separator),
repeat(seq(
$._parameter,
optional($.separator)
))
),
_parameter: $ => choice(
$.number,
$.large,
$.string,
),
declaration: $ => /[A-Z_\d]+/,
number: $ => token(prec(1, /\d+/)),
large: $ => /[A-Z_\d]+/,
string: $ => /[A-Za-z ]+/,
separator: $ => /:/,
comment: $ => /[^\[\]\s]+/
}
});

1
node_modules/.bin/tree-sitter generated vendored Symbolic link
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../tree-sitter-cli/cli.js

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node_modules/.package-lock.json generated vendored Normal file
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{
"name": "tree-sitter-dfraw",
"version": "1.0.0",
"lockfileVersion": 2,
"requires": true,
"packages": {
"node_modules/nan": {
"version": "2.15.0",
"resolved": "https://registry.npmjs.org/nan/-/nan-2.15.0.tgz",
"integrity": "sha512-8ZtvEnA2c5aYCZYd1cvgdnU6cqwixRoYg70xPLWUws5ORTa/lnw+u4amixRS/Ac5U5mQVgp9pnlSUnbNWFaWZQ=="
},
"node_modules/tree-sitter-cli": {
"version": "0.20.0",
"resolved": "https://registry.npmjs.org/tree-sitter-cli/-/tree-sitter-cli-0.20.0.tgz",
"integrity": "sha512-4D1qapWbJXZ5rrSUGM5rcw5Vuq/smzn9KbiFRhlON6KeuuXjra+KAtDYVrDgAoLIG4ku+jbEEGrJxCptUGi3dg==",
"dev": true,
"hasInstallScript": true,
"bin": {
"tree-sitter": "cli.js"
}
}
}
}

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node_modules/nan/CHANGELOG.md generated vendored Normal file
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# NAN ChangeLog
**Version 2.15.0: current Node 16.6.1, Node 0.12: 0.12.18, Node 0.10: 0.10.48, iojs: 3.3.1**
### 2.15.0 Aug 4 2021
- Feature: add ScriptOrigin (#918) d09debf9eeedcb7ca4073e84ffe5fbb455ecb709
### 2.14.2 Oct 13 2020
- Bugfix: fix gcc 8 function cast warning (#899) 35f0fab205574b2cbda04e6347c8b2db755e124f
### 2.14.1 Apr 21 2020
- Bugfix: use GetBackingStore() instead of GetContents() (#888) 2c023bd447661a61071da318b0ff4003c3858d39
### 2.14.0 May 16 2019
- Feature: Add missing methods to Nan::Maybe<T> (#852) 4e962489fb84a184035b9fa74f245f650249aca6
### 2.13.2 Mar 24 2019
- Bugfix: remove usage of deprecated `IsNearDeath` (#842) fbaf42252af279c3d867c6b193571f9711c39847
### 2.13.1 Mar 14 2019
- Bugfix: check V8 version directly instead of inferring from NMV (#840) 12f9df9f393285de8fb4a8cd01478dc4fe3b089d
### 2.13.0 Mar 13 2019
- Feature: add support for node master (#831) 113c0282072e7ff4f9dfc98b432fd894b798c2c
### 2.12.1 Dec 18 2018
- Bugfix: Fix build breakage with Node.js 10.0.0-10.9.0. (#833) 625e90e8fef8d39ffa7247250a76a100b2487474
### 2.12.0 Dec 16 2018
- Bugfix: Add scope.Escape() to Call() (#817) 2e5ed4fc3a8ac80a6ef1f2a55099ab3ac8800dc6
- Bugfix: Fix Node.js v10.12.0 deprecation warnings. 509859cc23b1770376b56550a027840a2ce0f73d
- Feature: Allow SetWeak() for non-object persistent handles. (#824) e6ef6a48e7e671fe3e4b7dddaa8912a3f8262ecd
### 2.11.1 Sep 29 2018
- Fix: adapt to V8 7.0 24a22c3b25eeeec2016c6ec239bdd6169e985447
### 2.11.0 Aug 25 2018
- Removal: remove `FunctionCallbackInfo::Callee` for nodejs `>= 10` 1a56c0a6efd4fac944cb46c30912a8e023bda7d4
- Bugfix: Fix `AsyncProgressWorkerBase::WorkProgress` sends invalid data b0c764d1dab11e9f8b37ffb81e2560a4498aad5e
- Feature: Introduce `GetCurrentEventLoop` b4911b0bb1f6d47d860e10ec014d941c51efac5e
- Feature: Add `NAN_MODULE_WORKER_ENABLED` macro as a replacement for `NAN_MODULE` b058fb047d18a58250e66ae831444441c1f2ac7a
### 2.10.0 Mar 16 2018
- Deprecation: Deprecate `MakeCallback` 5e92b19a59e194241d6a658bd6ff7bfbda372950
- Feature: add `Nan::Call` overload 4482e1242fe124d166fc1a5b2be3c1cc849fe452
- Feature: add more `Nan::Call` overloads 8584e63e6d04c7d2eb8c4a664e4ef57d70bf672b
- Feature: Fix deprecation warnings for Node 10 1caf258243b0602ed56922bde74f1c91b0cbcb6a
### 2.9.2 Feb 22 2018
- Bugfix: Bandaid for async hooks 212bd2f849be14ef1b02fc85010b053daa24252b
### 2.9.1 Feb 22 2018
- Bugfix: Avoid deprecation warnings in deprecated `Nan::Callback::operator()` 372b14d91289df4604b0f81780709708c45a9aa4
- Bugfix: Avoid deprecation warnings in `Nan::JSON` 3bc294bce0b7d0a3ee4559926303e5ed4866fda2
### 2.9.0 Feb 22 2018
- Deprecation: Deprecate legacy `Callback::Call` 6dd5fa690af61ca3523004b433304c581b3ea309
- Feature: introduce `AsyncResource` class 90c0a179c0d8cb5fd26f1a7d2b1d6231eb402d48o
- Feature: Add context aware `Nan::Callback::Call` functions 7169e09fb088418b6e388222e88b4c13f07ebaee
- Feature: Make `AsyncWorker` context aware 066ba21a6fb9e2b5230c9ed3a6fc51f1211736a4
- Feature: add `Callback` overload to `Nan::Call` 5328daf66e202658c1dc0d916c3aaba99b3cc606
- Bugfix: fix warning: suggest parentheses around `&&` within `||` b2bb63d68b8ae623a526b542764e1ac82319cb2c
- Bugfix: Fix compilation on io.js 3 d06114dba0a522fb436f0c5f47b994210968cd7b
### 2.8.0 Nov 15 2017
- Deprecation: Deprecate `Nan::ForceSet` in favor of `Nan::DefineOwnProperty()` 95cbb976d6fbbba88ba0f86dd188223a8591b4e7
- Feature: Add `Nan::AsyncProgressQueueWorker` a976636ecc2ef617d1b061ce4a6edf39923691cb
- Feature: Add `Nan::DefineOwnProperty()` 95cbb976d6fbbba88ba0f86dd188223a8591b4e7
- Bugfix: Fix compiling on io.js 1 & 2 82705a64503ce60c62e98df5bd02972bba090900
- Bugfix: Use DefineOwnProperty instead of ForceSet 95cbb976d6fbbba88ba0f86dd188223a8591b4e7
### 2.7.0 Aug 30 2017
- Feature: Add `Nan::To<v8::Function>()` overload. b93280670c9f6da42ed4cf6cbf085ffdd87bd65b
- Bugfix: Fix ternary in `Nan::MaybeLocal<T>::FromMaybe<S>()`. 79a26f7d362e756a9524e672a82c3d603b542867
### 2.6.2 Apr 12 2017
- Bugfix: Fix v8::JSON::Parse() deprecation warning. 87f6a3c65815fa062296a994cc863e2fa124867d
### 2.6.1 Apr 6 2017
- Bugfix: nan_json.h: fix build breakage in Node 6 ac8d47dc3c10bfbf3f15a6b951633120c0ee6d51
### 2.6.0 Apr 6 2017
- Feature: nan: add support for JSON::Parse & Stringify b533226c629cce70e1932a873bb6f849044a56c5
### 2.5.1 Jan 23 2017
- Bugfix: Fix disappearing handle for private value 6a80995694f162ef63dbc9948fbefd45d4485aa0
- Bugfix: Add missing scopes a93b8bae6bc7d32a170db6e89228b7f60ee57112
- Bugfix: Use string::data instead of string::front in NewOneByteString d5f920371e67e1f3b268295daee6e83af86b6e50
### 2.5.0 Dec 21 2016
- Feature: Support Private accessors a86255cb357e8ad8ccbf1f6a4a901c921e39a178
- Bugfix: Abort in delete operators that shouldn't be called 0fe38215ff8581703967dfd26c12793feb960018
### 2.4.0 Jul 10 2016
- Feature: Rewrite Callback to add Callback::Reset c4cf44d61f8275cd5f7b0c911d7a806d4004f649
- Feature: AsyncProgressWorker: add template types for .send 1242c9a11a7ed481c8f08ec06316385cacc513d0
- Bugfix: Add constness to old Persistent comparison operators bd43cb9982c7639605d60fd073efe8cae165d9b2
### 2.3.5 May 31 2016
- Bugfix: Replace NAN_INLINE with 'inline' keyword. 71819d8725f822990f439479c9aba3b240804909
### 2.3.4 May 31 2016
- Bugfix: Remove V8 deprecation warnings 0592fb0a47f3a1c7763087ebea8e1138829f24f9
- Bugfix: Fix new versions not to use WeakCallbackInfo::IsFirstPass 615c19d9e03d4be2049c10db0151edbc3b229246
- Bugfix: Make ObjectWrap::handle() const d19af99595587fe7a26bd850af6595c2a7145afc
- Bugfix: Fix compilation errors related to 0592fb0a47f3a1c7763087ebea8e1138829f24f9 e9191c525b94f652718325e28610a1adcf90fed8
### 2.3.3 May 4 2016
- Bugfix: Refactor SetMethod() to deal with v8::Templates (#566) b9083cf6d5de6ebe6bcb49c7502fbb7c0d9ddda8
### 2.3.2 Apr 27 2016
- Bugfix: Fix compilation on outdated versions due to Handle removal f8b7c875d04d425a41dfd4f3f8345bc3a11e6c52
### 2.3.1 Apr 27 2016
- Bugfix: Don't use deprecated v8::Template::Set() in SetMethod a90951e9ea70fa1b3836af4b925322919159100e
### 2.3.0 Apr 27 2016
- Feature: added Signal() for invoking async callbacks without sending data from AsyncProgressWorker d8adba45f20e077d00561b20199133620c990b38
- Bugfix: Don't use deprecated v8::Template::Set() 00dacf0a4b86027415867fa7f1059acc499dcece
### 2.2.1 Mar 29 2016
- Bugfix: Use NewFromUnsigned in ReturnValue<T>::Set(uint32_t i) for pre_12 3a18f9bdce29826e0e4c217854bc476918241a58
- Performance: Remove unneeeded nullptr checks b715ef44887931c94f0d1605b3b1a4156eebece9
### 2.2.0 Jan 9 2016
- Feature: Add Function::Call wrapper 4c157474dacf284d125c324177b45aa5dabc08c6
- Feature: Rename GC*logueCallback to GCCallback for > 4.0 3603435109f981606d300eb88004ca101283acec
- Bugfix: Fix Global::Pass for old versions 367e82a60fbaa52716232cc89db1cc3f685d77d9
- Bugfix: Remove weird MaybeLocal wrapping of what already is a MaybeLocal 23b4590db10c2ba66aee2338aebe9751c4cb190b
### 2.1.0 Oct 8 2015
- Deprecation: Deprecate NanErrnoException in favor of ErrnoException 0af1ca4cf8b3f0f65ed31bc63a663ab3319da55c
- Feature: added helper class for accessing contents of typedarrays 17b51294c801e534479d5463697a73462d0ca555
- Feature: [Maybe types] Add MakeMaybe(...) 48d7b53d9702b0c7a060e69ea10fea8fb48d814d
- Feature: new: allow utf16 string with length 66ac6e65c8ab9394ef588adfc59131b3b9d8347b
- Feature: Introduce SetCallHandler and SetCallAsFunctionHandler 7764a9a115d60ba10dc24d86feb0fbc9b4f75537
- Bugfix: Enable creating Locals from Globals under Node 0.10. 9bf9b8b190821af889790fdc18ace57257e4f9ff
- Bugfix: Fix issue #462 where PropertyCallbackInfo data is not stored safely. 55f50adedd543098526c7b9f4fffd607d3f9861f
### 2.0.9 Sep 8 2015
- Bugfix: EscapableHandleScope in Nan::NewBuffer for Node 0.8 and 0.10 b1654d7
### 2.0.8 Aug 28 2015
- Work around duplicate linking bug in clang 11902da
### 2.0.7 Aug 26 2015
- Build: Repackage
### 2.0.6 Aug 26 2015
- Bugfix: Properly handle null callback in FunctionTemplate factory 6e99cb1
- Bugfix: Remove unused static std::map instances 525bddc
- Bugfix: Make better use of maybe versions of APIs bfba85b
- Bugfix: Fix shadowing issues with handle in ObjectWrap 0a9072d
### 2.0.5 Aug 10 2015
- Bugfix: Reimplement weak callback in ObjectWrap 98d38c1
- Bugfix: Make sure callback classes are not assignable, copyable or movable 81f9b1d
### 2.0.4 Aug 6 2015
- Build: Repackage
### 2.0.3 Aug 6 2015
- Bugfix: Don't use clang++ / g++ syntax extension. 231450e
### 2.0.2 Aug 6 2015
- Build: Repackage
### 2.0.1 Aug 6 2015
- Bugfix: Add workaround for missing REPLACE_INVALID_UTF8 60d6687
- Bugfix: Reimplement ObjectWrap from scratch to prevent memory leaks 6484601
- Bugfix: Fix Persistent leak in FunctionCallbackInfo and PropertyCallbackInfo 641ef5f
- Bugfix: Add missing overload for Nan::NewInstance that takes argc/argv 29450ed
### 2.0.0 Jul 31 2015
- Change: Renamed identifiers with leading underscores b5932b4
- Change: Replaced NanObjectWrapHandle with class NanObjectWrap 464f1e1
- Change: Replace NanScope and NanEscpableScope macros with classes 47751c4
- Change: Rename NanNewBufferHandle to NanNewBuffer 6745f99
- Change: Rename NanBufferUse to NanNewBuffer 3e8b0a5
- Change: Rename NanNewBuffer to NanCopyBuffer d6af78d
- Change: Remove Nan prefix from all names 72d1f67
- Change: Update Buffer API for new upstream changes d5d3291
- Change: Rename Scope and EscapableScope to HandleScope and EscapableHandleScope 21a7a6a
- Change: Get rid of Handles e6c0daf
- Feature: Support io.js 3 with V8 4.4
- Feature: Introduce NanPersistent 7fed696
- Feature: Introduce NanGlobal 4408da1
- Feature: Added NanTryCatch 10f1ca4
- Feature: Update for V8 v4.3 4b6404a
- Feature: Introduce NanNewOneByteString c543d32
- Feature: Introduce namespace Nan 67ed1b1
- Removal: Remove NanLocker and NanUnlocker dd6e401
- Removal: Remove string converters, except NanUtf8String, which now follows the node implementation b5d00a9
- Removal: Remove NanReturn* macros d90a25c
- Removal: Remove HasInstance e8f84fe
### 1.9.0 Jul 31 2015
- Feature: Added `NanFatalException` 81d4a2c
- Feature: Added more error types 4265f06
- Feature: Added dereference and function call operators to NanCallback c4b2ed0
- Feature: Added indexed GetFromPersistent and SaveToPersistent edd510c
- Feature: Added more overloads of SaveToPersistent and GetFromPersistent 8b1cef6
- Feature: Added NanErrnoException dd87d9e
- Correctness: Prevent assign, copy, and move for classes that do not support it 1f55c59, 4b808cb, c96d9b2, fba4a29, 3357130
- Deprecation: Deprecate `NanGetPointerSafe` and `NanSetPointerSafe` 81d4a2c
- Deprecation: Deprecate `NanBooleanOptionValue` and `NanUInt32OptionValue` 0ad254b
### 1.8.4 Apr 26 2015
- Build: Repackage
### 1.8.3 Apr 26 2015
- Bugfix: Include missing header 1af8648
### 1.8.2 Apr 23 2015
- Build: Repackage
### 1.8.1 Apr 23 2015
- Bugfix: NanObjectWrapHandle should take a pointer 155f1d3
### 1.8.0 Apr 23 2015
- Feature: Allow primitives with NanReturnValue 2e4475e
- Feature: Added comparison operators to NanCallback 55b075e
- Feature: Backport thread local storage 15bb7fa
- Removal: Remove support for signatures with arguments 8a2069d
- Correcteness: Replaced NanObjectWrapHandle macro with function 0bc6d59
### 1.7.0 Feb 28 2015
- Feature: Made NanCallback::Call accept optional target 8d54da7
- Feature: Support atom-shell 0.21 0b7f1bb
### 1.6.2 Feb 6 2015
- Bugfix: NanEncode: fix argument type for node::Encode on io.js 2be8639
### 1.6.1 Jan 23 2015
- Build: version bump
### 1.5.3 Jan 23 2015
- Build: repackage
### 1.6.0 Jan 23 2015
- Deprecated `NanNewContextHandle` in favor of `NanNew<Context>` 49259af
- Support utility functions moved in newer v8 versions (Node 0.11.15, io.js 1.0) a0aa179
- Added `NanEncode`, `NanDecodeBytes` and `NanDecodeWrite` 75e6fb9
### 1.5.2 Jan 23 2015
- Bugfix: Fix non-inline definition build error with clang++ 21d96a1, 60fadd4
- Bugfix: Readded missing String constructors 18d828f
- Bugfix: Add overload handling NanNew<FunctionTemplate>(..) 5ef813b
- Bugfix: Fix uv_work_cb versioning 997e4ae
- Bugfix: Add function factory and test 4eca89c
- Bugfix: Add object template factory and test cdcb951
- Correctness: Lifted an io.js related typedef c9490be
- Correctness: Make explicit downcasts of String lengths 00074e6
- Windows: Limit the scope of disabled warning C4530 83d7deb
### 1.5.1 Jan 15 2015
- Build: version bump
### 1.4.3 Jan 15 2015
- Build: version bump
### 1.4.2 Jan 15 2015
- Feature: Support io.js 0dbc5e8
### 1.5.0 Jan 14 2015
- Feature: Support io.js b003843
- Correctness: Improved NanNew internals 9cd4f6a
- Feature: Implement progress to NanAsyncWorker 8d6a160
### 1.4.1 Nov 8 2014
- Bugfix: Handle DEBUG definition correctly
- Bugfix: Accept int as Boolean
### 1.4.0 Nov 1 2014
- Feature: Added NAN_GC_CALLBACK 6a5c245
- Performance: Removed unnecessary local handle creation 18a7243, 41fe2f8
- Correctness: Added constness to references in NanHasInstance 02c61cd
- Warnings: Fixed spurious warnings from -Wundef and -Wshadow, 541b122, 99d8cb6
- Windoze: Shut Visual Studio up when compiling 8d558c1
- License: Switch to plain MIT from custom hacked MIT license 11de983
- Build: Added test target to Makefile e232e46
- Performance: Removed superfluous scope in NanAsyncWorker f4b7821
- Sugar/Feature: Added NanReturnThis() and NanReturnHolder() shorthands 237a5ff, d697208
- Feature: Added suitable overload of NanNew for v8::Integer::NewFromUnsigned b27b450
### 1.3.0 Aug 2 2014
- Added NanNew<v8::String, std::string>(std::string)
- Added NanNew<v8::String, std::string&>(std::string&)
- Added NanAsciiString helper class
- Added NanUtf8String helper class
- Added NanUcs2String helper class
- Deprecated NanRawString()
- Deprecated NanCString()
- Added NanGetIsolateData(v8::Isolate *isolate)
- Added NanMakeCallback(v8::Handle<v8::Object> target, v8::Handle<v8::Function> func, int argc, v8::Handle<v8::Value>* argv)
- Added NanMakeCallback(v8::Handle<v8::Object> target, v8::Handle<v8::String> symbol, int argc, v8::Handle<v8::Value>* argv)
- Added NanMakeCallback(v8::Handle<v8::Object> target, const char* method, int argc, v8::Handle<v8::Value>* argv)
- Added NanSetTemplate(v8::Handle<v8::Template> templ, v8::Handle<v8::String> name , v8::Handle<v8::Data> value, v8::PropertyAttribute attributes)
- Added NanSetPrototypeTemplate(v8::Local<v8::FunctionTemplate> templ, v8::Handle<v8::String> name, v8::Handle<v8::Data> value, v8::PropertyAttribute attributes)
- Added NanSetInstanceTemplate(v8::Local<v8::FunctionTemplate> templ, const char *name, v8::Handle<v8::Data> value)
- Added NanSetInstanceTemplate(v8::Local<v8::FunctionTemplate> templ, v8::Handle<v8::String> name, v8::Handle<v8::Data> value, v8::PropertyAttribute attributes)
### 1.2.0 Jun 5 2014
- Add NanSetPrototypeTemplate
- Changed NAN_WEAK_CALLBACK internals, switched _NanWeakCallbackData to class,
introduced _NanWeakCallbackDispatcher
- Removed -Wno-unused-local-typedefs from test builds
- Made test builds Windows compatible ('Sleep()')
### 1.1.2 May 28 2014
- Release to fix more stuff-ups in 1.1.1
### 1.1.1 May 28 2014
- Release to fix version mismatch in nan.h and lack of changelog entry for 1.1.0
### 1.1.0 May 25 2014
- Remove nan_isolate, use v8::Isolate::GetCurrent() internally instead
- Additional explicit overloads for NanNew(): (char*,int), (uint8_t*[,int]),
(uint16_t*[,int), double, int, unsigned int, bool, v8::String::ExternalStringResource*,
v8::String::ExternalAsciiStringResource*
- Deprecate NanSymbol()
- Added SetErrorMessage() and ErrorMessage() to NanAsyncWorker
### 1.0.0 May 4 2014
- Heavy API changes for V8 3.25 / Node 0.11.13
- Use cpplint.py
- Removed NanInitPersistent
- Removed NanPersistentToLocal
- Removed NanFromV8String
- Removed NanMakeWeak
- Removed NanNewLocal
- Removed NAN_WEAK_CALLBACK_OBJECT
- Removed NAN_WEAK_CALLBACK_DATA
- Introduce NanNew, replaces NanNewLocal, NanPersistentToLocal, adds many overloaded typed versions
- Introduce NanUndefined, NanNull, NanTrue and NanFalse
- Introduce NanEscapableScope and NanEscapeScope
- Introduce NanMakeWeakPersistent (requires a special callback to work on both old and new node)
- Introduce NanMakeCallback for node::MakeCallback
- Introduce NanSetTemplate
- Introduce NanGetCurrentContext
- Introduce NanCompileScript and NanRunScript
- Introduce NanAdjustExternalMemory
- Introduce NanAddGCEpilogueCallback, NanAddGCPrologueCallback, NanRemoveGCEpilogueCallback, NanRemoveGCPrologueCallback
- Introduce NanGetHeapStatistics
- Rename NanAsyncWorker#SavePersistent() to SaveToPersistent()
### 0.8.0 Jan 9 2014
- NanDispose -> NanDisposePersistent, deprecate NanDispose
- Extract _NAN_*_RETURN_TYPE, pull up NAN_*()
### 0.7.1 Jan 9 2014
- Fixes to work against debug builds of Node
- Safer NanPersistentToLocal (avoid reinterpret_cast)
- Speed up common NanRawString case by only extracting flattened string when necessary
### 0.7.0 Dec 17 2013
- New no-arg form of NanCallback() constructor.
- NanCallback#Call takes Handle rather than Local
- Removed deprecated NanCallback#Run method, use NanCallback#Call instead
- Split off _NAN_*_ARGS_TYPE from _NAN_*_ARGS
- Restore (unofficial) Node 0.6 compatibility at NanCallback#Call()
- Introduce NanRawString() for char* (or appropriate void*) from v8::String
(replacement for NanFromV8String)
- Introduce NanCString() for null-terminated char* from v8::String
### 0.6.0 Nov 21 2013
- Introduce NanNewLocal<T>(v8::Handle<T> value) for use in place of
v8::Local<T>::New(...) since v8 started requiring isolate in Node 0.11.9
### 0.5.2 Nov 16 2013
- Convert SavePersistent and GetFromPersistent in NanAsyncWorker from protected and public
### 0.5.1 Nov 12 2013
- Use node::MakeCallback() instead of direct v8::Function::Call()
### 0.5.0 Nov 11 2013
- Added @TooTallNate as collaborator
- New, much simpler, "include_dirs" for binding.gyp
- Added full range of NAN_INDEX_* macros to match NAN_PROPERTY_* macros
### 0.4.4 Nov 2 2013
- Isolate argument from v8::Persistent::MakeWeak removed for 0.11.8+
### 0.4.3 Nov 2 2013
- Include node_object_wrap.h, removed from node.h for Node 0.11.8.
### 0.4.2 Nov 2 2013
- Handle deprecation of v8::Persistent::Dispose(v8::Isolate* isolate)) for
Node 0.11.8 release.
### 0.4.1 Sep 16 2013
- Added explicit `#include <uv.h>` as it was removed from node.h for v0.11.8
### 0.4.0 Sep 2 2013
- Added NAN_INLINE and NAN_DEPRECATED and made use of them
- Added NanError, NanTypeError and NanRangeError
- Cleaned up code
### 0.3.2 Aug 30 2013
- Fix missing scope declaration in GetFromPersistent() and SaveToPersistent
in NanAsyncWorker
### 0.3.1 Aug 20 2013
- fix "not all control paths return a value" compile warning on some platforms
### 0.3.0 Aug 19 2013
- Made NAN work with NPM
- Lots of fixes to NanFromV8String, pulling in features from new Node core
- Changed node::encoding to Nan::Encoding in NanFromV8String to unify the API
- Added optional error number argument for NanThrowError()
- Added NanInitPersistent()
- Added NanReturnNull() and NanReturnEmptyString()
- Added NanLocker and NanUnlocker
- Added missing scopes
- Made sure to clear disposed Persistent handles
- Changed NanAsyncWorker to allocate error messages on the heap
- Changed NanThrowError(Local<Value>) to NanThrowError(Handle<Value>)
- Fixed leak in NanAsyncWorker when errmsg is used
### 0.2.2 Aug 5 2013
- Fixed usage of undefined variable with node::BASE64 in NanFromV8String()
### 0.2.1 Aug 5 2013
- Fixed 0.8 breakage, node::BUFFER encoding type not available in 0.8 for
NanFromV8String()
### 0.2.0 Aug 5 2013
- Added NAN_PROPERTY_GETTER, NAN_PROPERTY_SETTER, NAN_PROPERTY_ENUMERATOR,
NAN_PROPERTY_DELETER, NAN_PROPERTY_QUERY
- Extracted _NAN_METHOD_ARGS, _NAN_GETTER_ARGS, _NAN_SETTER_ARGS,
_NAN_PROPERTY_GETTER_ARGS, _NAN_PROPERTY_SETTER_ARGS,
_NAN_PROPERTY_ENUMERATOR_ARGS, _NAN_PROPERTY_DELETER_ARGS,
_NAN_PROPERTY_QUERY_ARGS
- Added NanGetInternalFieldPointer, NanSetInternalFieldPointer
- Added NAN_WEAK_CALLBACK, NAN_WEAK_CALLBACK_OBJECT,
NAN_WEAK_CALLBACK_DATA, NanMakeWeak
- Renamed THROW_ERROR to _NAN_THROW_ERROR
- Added NanNewBufferHandle(char*, size_t, node::smalloc::FreeCallback, void*)
- Added NanBufferUse(char*, uint32_t)
- Added NanNewContextHandle(v8::ExtensionConfiguration*,
v8::Handle<v8::ObjectTemplate>, v8::Handle<v8::Value>)
- Fixed broken NanCallback#GetFunction()
- Added optional encoding and size arguments to NanFromV8String()
- Added NanGetPointerSafe() and NanSetPointerSafe()
- Added initial test suite (to be expanded)
- Allow NanUInt32OptionValue to convert any Number object
### 0.1.0 Jul 21 2013
- Added `NAN_GETTER`, `NAN_SETTER`
- Added `NanThrowError` with single Local<Value> argument
- Added `NanNewBufferHandle` with single uint32_t argument
- Added `NanHasInstance(Persistent<FunctionTemplate>&, Handle<Value>)`
- Added `Local<Function> NanCallback#GetFunction()`
- Added `NanCallback#Call(int, Local<Value>[])`
- Deprecated `NanCallback#Run(int, Local<Value>[])` in favour of Call

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The MIT License (MIT)
=====================
Copyright (c) 2018 NAN contributors
-----------------------------------
*NAN contributors listed at <https://github.com/nodejs/nan#contributors>*
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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Native Abstractions for Node.js
===============================
**A header file filled with macro and utility goodness for making add-on development for Node.js easier across versions 0.8, 0.10, 0.12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 and 16.**
***Current version: 2.15.0***
*(See [CHANGELOG.md](https://github.com/nodejs/nan/blob/master/CHANGELOG.md) for complete ChangeLog)*
[![NPM](https://nodei.co/npm/nan.png?downloads=true&downloadRank=true)](https://nodei.co/npm/nan/) [![NPM](https://nodei.co/npm-dl/nan.png?months=6&height=3)](https://nodei.co/npm/nan/)
[![Build Status](https://api.travis-ci.com/nodejs/nan.svg?branch=master)](https://travis-ci.com/nodejs/nan)
[![Build status](https://ci.appveyor.com/api/projects/status/kh73pbm9dsju7fgh)](https://ci.appveyor.com/project/RodVagg/nan)
Thanks to the crazy changes in V8 (and some in Node core), keeping native addons compiling happily across versions, particularly 0.10 to 0.12 to 4.0, is a minor nightmare. The goal of this project is to store all logic necessary to develop native Node.js addons without having to inspect `NODE_MODULE_VERSION` and get yourself into a macro-tangle.
This project also contains some helper utilities that make addon development a bit more pleasant.
* **[News & Updates](#news)**
* **[Usage](#usage)**
* **[Example](#example)**
* **[API](#api)**
* **[Tests](#tests)**
* **[Known issues](#issues)**
* **[Governance & Contributing](#governance)**
<a name="news"></a>
## News & Updates
<a name="usage"></a>
## Usage
Simply add **NAN** as a dependency in the *package.json* of your Node addon:
``` bash
$ npm install --save nan
```
Pull in the path to **NAN** in your *binding.gyp* so that you can use `#include <nan.h>` in your *.cpp* files:
``` python
"include_dirs" : [
"<!(node -e \"require('nan')\")"
]
```
This works like a `-I<path-to-NAN>` when compiling your addon.
<a name="example"></a>
## Example
Just getting started with Nan? Take a look at the **[Node Add-on Examples](https://github.com/nodejs/node-addon-examples)**.
Refer to a [quick-start **Nan** Boilerplate](https://github.com/fcanas/node-native-boilerplate) for a ready-to-go project that utilizes basic Nan functionality.
For a simpler example, see the **[async pi estimation example](https://github.com/nodejs/nan/tree/master/examples/async_pi_estimate)** in the examples directory for full code and an explanation of what this Monte Carlo Pi estimation example does. Below are just some parts of the full example that illustrate the use of **NAN**.
Yet another example is **[nan-example-eol](https://github.com/CodeCharmLtd/nan-example-eol)**. It shows newline detection implemented as a native addon.
Also take a look at our comprehensive **[C++ test suite](https://github.com/nodejs/nan/tree/master/test/cpp)** which has a plethora of code snippets for your pasting pleasure.
<a name="api"></a>
## API
Additional to the NAN documentation below, please consult:
* [The V8 Getting Started * Guide](https://v8.dev/docs/embed)
* [V8 API Documentation](https://v8docs.nodesource.com/)
* [Node Add-on Documentation](https://nodejs.org/api/addons.html)
<!-- START API -->
### JavaScript-accessible methods
A _template_ is a blueprint for JavaScript functions and objects in a context. You can use a template to wrap C++ functions and data structures within JavaScript objects so that they can be manipulated from JavaScript. See the V8 Embedders Guide section on [Templates](https://github.com/v8/v8/wiki/Embedder%27s-Guide#templates) for further information.
In order to expose functionality to JavaScript via a template, you must provide it to V8 in a form that it understands. Across the versions of V8 supported by NAN, JavaScript-accessible method signatures vary widely, NAN fully abstracts method declaration and provides you with an interface that is similar to the most recent V8 API but is backward-compatible with older versions that still use the now-deceased `v8::Argument` type.
* **Method argument types**
- <a href="doc/methods.md#api_nan_function_callback_info"><b><code>Nan::FunctionCallbackInfo</code></b></a>
- <a href="doc/methods.md#api_nan_property_callback_info"><b><code>Nan::PropertyCallbackInfo</code></b></a>
- <a href="doc/methods.md#api_nan_return_value"><b><code>Nan::ReturnValue</code></b></a>
* **Method declarations**
- <a href="doc/methods.md#api_nan_method"><b>Method declaration</b></a>
- <a href="doc/methods.md#api_nan_getter"><b>Getter declaration</b></a>
- <a href="doc/methods.md#api_nan_setter"><b>Setter declaration</b></a>
- <a href="doc/methods.md#api_nan_property_getter"><b>Property getter declaration</b></a>
- <a href="doc/methods.md#api_nan_property_setter"><b>Property setter declaration</b></a>
- <a href="doc/methods.md#api_nan_property_enumerator"><b>Property enumerator declaration</b></a>
- <a href="doc/methods.md#api_nan_property_deleter"><b>Property deleter declaration</b></a>
- <a href="doc/methods.md#api_nan_property_query"><b>Property query declaration</b></a>
- <a href="doc/methods.md#api_nan_index_getter"><b>Index getter declaration</b></a>
- <a href="doc/methods.md#api_nan_index_setter"><b>Index setter declaration</b></a>
- <a href="doc/methods.md#api_nan_index_enumerator"><b>Index enumerator declaration</b></a>
- <a href="doc/methods.md#api_nan_index_deleter"><b>Index deleter declaration</b></a>
- <a href="doc/methods.md#api_nan_index_query"><b>Index query declaration</b></a>
* Method and template helpers
- <a href="doc/methods.md#api_nan_set_method"><b><code>Nan::SetMethod()</code></b></a>
- <a href="doc/methods.md#api_nan_set_prototype_method"><b><code>Nan::SetPrototypeMethod()</code></b></a>
- <a href="doc/methods.md#api_nan_set_accessor"><b><code>Nan::SetAccessor()</code></b></a>
- <a href="doc/methods.md#api_nan_set_named_property_handler"><b><code>Nan::SetNamedPropertyHandler()</code></b></a>
- <a href="doc/methods.md#api_nan_set_indexed_property_handler"><b><code>Nan::SetIndexedPropertyHandler()</code></b></a>
- <a href="doc/methods.md#api_nan_set_template"><b><code>Nan::SetTemplate()</code></b></a>
- <a href="doc/methods.md#api_nan_set_prototype_template"><b><code>Nan::SetPrototypeTemplate()</code></b></a>
- <a href="doc/methods.md#api_nan_set_instance_template"><b><code>Nan::SetInstanceTemplate()</code></b></a>
- <a href="doc/methods.md#api_nan_set_call_handler"><b><code>Nan::SetCallHandler()</code></b></a>
- <a href="doc/methods.md#api_nan_set_call_as_function_handler"><b><code>Nan::SetCallAsFunctionHandler()</code></b></a>
### Scopes
A _local handle_ is a pointer to an object. All V8 objects are accessed using handles, they are necessary because of the way the V8 garbage collector works.
A handle scope can be thought of as a container for any number of handles. When you've finished with your handles, instead of deleting each one individually you can simply delete their scope.
The creation of `HandleScope` objects is different across the supported versions of V8. Therefore, NAN provides its own implementations that can be used safely across these.
- <a href="doc/scopes.md#api_nan_handle_scope"><b><code>Nan::HandleScope</code></b></a>
- <a href="doc/scopes.md#api_nan_escapable_handle_scope"><b><code>Nan::EscapableHandleScope</code></b></a>
Also see the V8 Embedders Guide section on [Handles and Garbage Collection](https://github.com/v8/v8/wiki/Embedder%27s%20Guide#handles-and-garbage-collection).
### Persistent references
An object reference that is independent of any `HandleScope` is a _persistent_ reference. Where a `Local` handle only lives as long as the `HandleScope` in which it was allocated, a `Persistent` handle remains valid until it is explicitly disposed.
Due to the evolution of the V8 API, it is necessary for NAN to provide a wrapper implementation of the `Persistent` classes to supply compatibility across the V8 versions supported.
- <a href="doc/persistent.md#api_nan_persistent_base"><b><code>Nan::PersistentBase & v8::PersistentBase</code></b></a>
- <a href="doc/persistent.md#api_nan_non_copyable_persistent_traits"><b><code>Nan::NonCopyablePersistentTraits & v8::NonCopyablePersistentTraits</code></b></a>
- <a href="doc/persistent.md#api_nan_copyable_persistent_traits"><b><code>Nan::CopyablePersistentTraits & v8::CopyablePersistentTraits</code></b></a>
- <a href="doc/persistent.md#api_nan_persistent"><b><code>Nan::Persistent</code></b></a>
- <a href="doc/persistent.md#api_nan_global"><b><code>Nan::Global</code></b></a>
- <a href="doc/persistent.md#api_nan_weak_callback_info"><b><code>Nan::WeakCallbackInfo</code></b></a>
- <a href="doc/persistent.md#api_nan_weak_callback_type"><b><code>Nan::WeakCallbackType</code></b></a>
Also see the V8 Embedders Guide section on [Handles and Garbage Collection](https://developers.google.com/v8/embed#handles).
### New
NAN provides a `Nan::New()` helper for the creation of new JavaScript objects in a way that's compatible across the supported versions of V8.
- <a href="doc/new.md#api_nan_new"><b><code>Nan::New()</code></b></a>
- <a href="doc/new.md#api_nan_undefined"><b><code>Nan::Undefined()</code></b></a>
- <a href="doc/new.md#api_nan_null"><b><code>Nan::Null()</code></b></a>
- <a href="doc/new.md#api_nan_true"><b><code>Nan::True()</code></b></a>
- <a href="doc/new.md#api_nan_false"><b><code>Nan::False()</code></b></a>
- <a href="doc/new.md#api_nan_empty_string"><b><code>Nan::EmptyString()</code></b></a>
### Converters
NAN contains functions that convert `v8::Value`s to other `v8::Value` types and native types. Since type conversion is not guaranteed to succeed, they return `Nan::Maybe` types. These converters can be used in place of `value->ToX()` and `value->XValue()` (where `X` is one of the types, e.g. `Boolean`) in a way that provides a consistent interface across V8 versions. Newer versions of V8 use the new `v8::Maybe` and `v8::MaybeLocal` types for these conversions, older versions don't have this functionality so it is provided by NAN.
- <a href="doc/converters.md#api_nan_to"><b><code>Nan::To()</code></b></a>
### Maybe Types
The `Nan::MaybeLocal` and `Nan::Maybe` types are monads that encapsulate `v8::Local` handles that _may be empty_.
* **Maybe Types**
- <a href="doc/maybe_types.md#api_nan_maybe_local"><b><code>Nan::MaybeLocal</code></b></a>
- <a href="doc/maybe_types.md#api_nan_maybe"><b><code>Nan::Maybe</code></b></a>
- <a href="doc/maybe_types.md#api_nan_nothing"><b><code>Nan::Nothing</code></b></a>
- <a href="doc/maybe_types.md#api_nan_just"><b><code>Nan::Just</code></b></a>
* **Maybe Helpers**
- <a href="doc/maybe_types.md#api_nan_call"><b><code>Nan::Call()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_to_detail_string"><b><code>Nan::ToDetailString()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_to_array_index"><b><code>Nan::ToArrayIndex()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_equals"><b><code>Nan::Equals()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_new_instance"><b><code>Nan::NewInstance()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_function"><b><code>Nan::GetFunction()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_set"><b><code>Nan::Set()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_define_own_property"><b><code>Nan::DefineOwnProperty()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_force_set"><del><b><code>Nan::ForceSet()</code></b></del></a>
- <a href="doc/maybe_types.md#api_nan_get"><b><code>Nan::Get()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_property_attribute"><b><code>Nan::GetPropertyAttributes()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_has"><b><code>Nan::Has()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_delete"><b><code>Nan::Delete()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_property_names"><b><code>Nan::GetPropertyNames()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_own_property_names"><b><code>Nan::GetOwnPropertyNames()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_set_prototype"><b><code>Nan::SetPrototype()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_object_proto_to_string"><b><code>Nan::ObjectProtoToString()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_has_own_property"><b><code>Nan::HasOwnProperty()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_has_real_named_property"><b><code>Nan::HasRealNamedProperty()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_has_real_indexed_property"><b><code>Nan::HasRealIndexedProperty()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_has_real_named_callback_property"><b><code>Nan::HasRealNamedCallbackProperty()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_real_named_property_in_prototype_chain"><b><code>Nan::GetRealNamedPropertyInPrototypeChain()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_real_named_property"><b><code>Nan::GetRealNamedProperty()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_call_as_function"><b><code>Nan::CallAsFunction()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_call_as_constructor"><b><code>Nan::CallAsConstructor()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_source_line"><b><code>Nan::GetSourceLine()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_line_number"><b><code>Nan::GetLineNumber()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_start_column"><b><code>Nan::GetStartColumn()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_end_column"><b><code>Nan::GetEndColumn()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_clone_element_at"><b><code>Nan::CloneElementAt()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_has_private"><b><code>Nan::HasPrivate()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_get_private"><b><code>Nan::GetPrivate()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_set_private"><b><code>Nan::SetPrivate()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_delete_private"><b><code>Nan::DeletePrivate()</code></b></a>
- <a href="doc/maybe_types.md#api_nan_make_maybe"><b><code>Nan::MakeMaybe()</code></b></a>
### Script
NAN provides `v8::Script` helpers as the API has changed over the supported versions of V8.
- <a href="doc/script.md#api_nan_compile_script"><b><code>Nan::CompileScript()</code></b></a>
- <a href="doc/script.md#api_nan_run_script"><b><code>Nan::RunScript()</code></b></a>
- <a href="doc/script.md#api_nan_script_origin"><b><code>Nan::ScriptOrigin</code></b></a>
### JSON
The _JSON_ object provides the C++ versions of the methods offered by the `JSON` object in javascript. V8 exposes these methods via the `v8::JSON` object.
- <a href="doc/json.md#api_nan_json_parse"><b><code>Nan::JSON.Parse</code></b></a>
- <a href="doc/json.md#api_nan_json_stringify"><b><code>Nan::JSON.Stringify</code></b></a>
Refer to the V8 JSON object in the [V8 documentation](https://v8docs.nodesource.com/node-8.16/da/d6f/classv8_1_1_j_s_o_n.html) for more information about these methods and their arguments.
### Errors
NAN includes helpers for creating, throwing and catching Errors as much of this functionality varies across the supported versions of V8 and must be abstracted.
Note that an Error object is simply a specialized form of `v8::Value`.
Also consult the V8 Embedders Guide section on [Exceptions](https://developers.google.com/v8/embed#exceptions) for more information.
- <a href="doc/errors.md#api_nan_error"><b><code>Nan::Error()</code></b></a>
- <a href="doc/errors.md#api_nan_range_error"><b><code>Nan::RangeError()</code></b></a>
- <a href="doc/errors.md#api_nan_reference_error"><b><code>Nan::ReferenceError()</code></b></a>
- <a href="doc/errors.md#api_nan_syntax_error"><b><code>Nan::SyntaxError()</code></b></a>
- <a href="doc/errors.md#api_nan_type_error"><b><code>Nan::TypeError()</code></b></a>
- <a href="doc/errors.md#api_nan_throw_error"><b><code>Nan::ThrowError()</code></b></a>
- <a href="doc/errors.md#api_nan_throw_range_error"><b><code>Nan::ThrowRangeError()</code></b></a>
- <a href="doc/errors.md#api_nan_throw_reference_error"><b><code>Nan::ThrowReferenceError()</code></b></a>
- <a href="doc/errors.md#api_nan_throw_syntax_error"><b><code>Nan::ThrowSyntaxError()</code></b></a>
- <a href="doc/errors.md#api_nan_throw_type_error"><b><code>Nan::ThrowTypeError()</code></b></a>
- <a href="doc/errors.md#api_nan_fatal_exception"><b><code>Nan::FatalException()</code></b></a>
- <a href="doc/errors.md#api_nan_errno_exception"><b><code>Nan::ErrnoException()</code></b></a>
- <a href="doc/errors.md#api_nan_try_catch"><b><code>Nan::TryCatch</code></b></a>
### Buffers
NAN's `node::Buffer` helpers exist as the API has changed across supported Node versions. Use these methods to ensure compatibility.
- <a href="doc/buffers.md#api_nan_new_buffer"><b><code>Nan::NewBuffer()</code></b></a>
- <a href="doc/buffers.md#api_nan_copy_buffer"><b><code>Nan::CopyBuffer()</code></b></a>
- <a href="doc/buffers.md#api_nan_free_callback"><b><code>Nan::FreeCallback()</code></b></a>
### Nan::Callback
`Nan::Callback` makes it easier to use `v8::Function` handles as callbacks. A class that wraps a `v8::Function` handle, protecting it from garbage collection and making it particularly useful for storage and use across asynchronous execution.
- <a href="doc/callback.md#api_nan_callback"><b><code>Nan::Callback</code></b></a>
### Asynchronous work helpers
`Nan::AsyncWorker`, `Nan::AsyncProgressWorker` and `Nan::AsyncProgressQueueWorker` are helper classes that make working with asynchronous code easier.
- <a href="doc/asyncworker.md#api_nan_async_worker"><b><code>Nan::AsyncWorker</code></b></a>
- <a href="doc/asyncworker.md#api_nan_async_progress_worker"><b><code>Nan::AsyncProgressWorkerBase &amp; Nan::AsyncProgressWorker</code></b></a>
- <a href="doc/asyncworker.md#api_nan_async_progress_queue_worker"><b><code>Nan::AsyncProgressQueueWorker</code></b></a>
- <a href="doc/asyncworker.md#api_nan_async_queue_worker"><b><code>Nan::AsyncQueueWorker</code></b></a>
### Strings & Bytes
Miscellaneous string & byte encoding and decoding functionality provided for compatibility across supported versions of V8 and Node. Implemented by NAN to ensure that all encoding types are supported, even for older versions of Node where they are missing.
- <a href="doc/string_bytes.md#api_nan_encoding"><b><code>Nan::Encoding</code></b></a>
- <a href="doc/string_bytes.md#api_nan_encode"><b><code>Nan::Encode()</code></b></a>
- <a href="doc/string_bytes.md#api_nan_decode_bytes"><b><code>Nan::DecodeBytes()</code></b></a>
- <a href="doc/string_bytes.md#api_nan_decode_write"><b><code>Nan::DecodeWrite()</code></b></a>
### Object Wrappers
The `ObjectWrap` class can be used to make wrapped C++ objects and a factory of wrapped objects.
- <a href="doc/object_wrappers.md#api_nan_object_wrap"><b><code>Nan::ObjectWrap</code></b></a>
### V8 internals
The hooks to access V8 internals—including GC and statistics—are different across the supported versions of V8, therefore NAN provides its own hooks that call the appropriate V8 methods.
- <a href="doc/v8_internals.md#api_nan_gc_callback"><b><code>NAN_GC_CALLBACK()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_add_gc_epilogue_callback"><b><code>Nan::AddGCEpilogueCallback()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_remove_gc_epilogue_callback"><b><code>Nan::RemoveGCEpilogueCallback()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_add_gc_prologue_callback"><b><code>Nan::AddGCPrologueCallback()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_remove_gc_prologue_callback"><b><code>Nan::RemoveGCPrologueCallback()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_get_heap_statistics"><b><code>Nan::GetHeapStatistics()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_set_counter_function"><b><code>Nan::SetCounterFunction()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_set_create_histogram_function"><b><code>Nan::SetCreateHistogramFunction()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_set_add_histogram_sample_function"><b><code>Nan::SetAddHistogramSampleFunction()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_idle_notification"><b><code>Nan::IdleNotification()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_low_memory_notification"><b><code>Nan::LowMemoryNotification()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_context_disposed_notification"><b><code>Nan::ContextDisposedNotification()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_get_internal_field_pointer"><b><code>Nan::GetInternalFieldPointer()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_set_internal_field_pointer"><b><code>Nan::SetInternalFieldPointer()</code></b></a>
- <a href="doc/v8_internals.md#api_nan_adjust_external_memory"><b><code>Nan::AdjustExternalMemory()</code></b></a>
### Miscellaneous V8 Helpers
- <a href="doc/v8_misc.md#api_nan_utf8_string"><b><code>Nan::Utf8String</code></b></a>
- <a href="doc/v8_misc.md#api_nan_get_current_context"><b><code>Nan::GetCurrentContext()</code></b></a>
- <a href="doc/v8_misc.md#api_nan_set_isolate_data"><b><code>Nan::SetIsolateData()</code></b></a>
- <a href="doc/v8_misc.md#api_nan_get_isolate_data"><b><code>Nan::GetIsolateData()</code></b></a>
- <a href="doc/v8_misc.md#api_nan_typedarray_contents"><b><code>Nan::TypedArrayContents</code></b></a>
### Miscellaneous Node Helpers
- <a href="doc/node_misc.md#api_nan_asyncresource"><b><code>Nan::AsyncResource</code></b></a>
- <a href="doc/node_misc.md#api_nan_make_callback"><b><code>Nan::MakeCallback()</code></b></a>
- <a href="doc/node_misc.md#api_nan_module_init"><b><code>NAN_MODULE_INIT()</code></b></a>
- <a href="doc/node_misc.md#api_nan_export"><b><code>Nan::Export()</code></b></a>
<!-- END API -->
<a name="tests"></a>
### Tests
To run the NAN tests do:
``` sh
npm install
npm run-script rebuild-tests
npm test
```
Or just:
``` sh
npm install
make test
```
<a name="issues"></a>
## Known issues
### Compiling against Node.js 0.12 on OSX
With new enough compilers available on OSX, the versions of V8 headers corresponding to Node.js 0.12
do not compile anymore. The error looks something like:
```
CXX(target) Release/obj.target/accessors/cpp/accessors.o
In file included from ../cpp/accessors.cpp:9:
In file included from ../../nan.h:51:
In file included from /Users/ofrobots/.node-gyp/0.12.18/include/node/node.h:61:
/Users/ofrobots/.node-gyp/0.12.18/include/node/v8.h:5800:54: error: 'CreateHandle' is a protected member of 'v8::HandleScope'
return Handle<T>(reinterpret_cast<T*>(HandleScope::CreateHandle(
~~~~~~~~~~~~~^~~~~~~~~~~~
```
This can be worked around by patching your local versions of v8.h corresponding to Node 0.12 to make
`v8::Handle` a friend of `v8::HandleScope`. Since neither Node.js not V8 support this release line anymore
this patch cannot be released by either project in an official release.
For this reason, we do not test against Node.js 0.12 on OSX in this project's CI. If you need to support
that configuration, you will need to either get an older compiler, or apply a source patch to the version
of V8 headers as a workaround.
<a name="governance"></a>
## Governance & Contributing
NAN is governed by the [Node.js Addon API Working Group](https://github.com/nodejs/CTC/blob/master/WORKING_GROUPS.md#addon-api)
### Addon API Working Group (WG)
The NAN project is jointly governed by a Working Group which is responsible for high-level guidance of the project.
Members of the WG are also known as Collaborators, there is no distinction between the two, unlike other Node.js projects.
The WG has final authority over this project including:
* Technical direction
* Project governance and process (including this policy)
* Contribution policy
* GitHub repository hosting
* Maintaining the list of additional Collaborators
For the current list of WG members, see the project [README.md](./README.md#collaborators).
Individuals making significant and valuable contributions are made members of the WG and given commit-access to the project. These individuals are identified by the WG and their addition to the WG is discussed via GitHub and requires unanimous consensus amongst those WG members participating in the discussion with a quorum of 50% of WG members required for acceptance of the vote.
_Note:_ If you make a significant contribution and are not considered for commit-access log an issue or contact a WG member directly.
For the current list of WG members / Collaborators, see the project [README.md](./README.md#collaborators).
### Consensus Seeking Process
The WG follows a [Consensus Seeking](https://en.wikipedia.org/wiki/Consensus-seeking_decision-making) decision making model.
Modifications of the contents of the NAN repository are made on a collaborative basis. Anybody with a GitHub account may propose a modification via pull request and it will be considered by the WG. All pull requests must be reviewed and accepted by a WG member with sufficient expertise who is able to take full responsibility for the change. In the case of pull requests proposed by an existing WG member, an additional WG member is required for sign-off. Consensus should be sought if additional WG members participate and there is disagreement around a particular modification.
If a change proposal cannot reach a consensus, a WG member can call for a vote amongst the members of the WG. Simple majority wins.
<a id="developers-certificate-of-origin"></a>
## Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
* (a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
* (b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
* (c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
* (d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
<a name="collaborators"></a>
### WG Members / Collaborators
<table><tbody>
<tr><th align="left">Rod Vagg</th><td><a href="https://github.com/rvagg">GitHub/rvagg</a></td><td><a href="http://twitter.com/rvagg">Twitter/@rvagg</a></td></tr>
<tr><th align="left">Benjamin Byholm</th><td><a href="https://github.com/kkoopa/">GitHub/kkoopa</a></td><td>-</td></tr>
<tr><th align="left">Trevor Norris</th><td><a href="https://github.com/trevnorris">GitHub/trevnorris</a></td><td><a href="http://twitter.com/trevnorris">Twitter/@trevnorris</a></td></tr>
<tr><th align="left">Nathan Rajlich</th><td><a href="https://github.com/TooTallNate">GitHub/TooTallNate</a></td><td><a href="http://twitter.com/TooTallNate">Twitter/@TooTallNate</a></td></tr>
<tr><th align="left">Brett Lawson</th><td><a href="https://github.com/brett19">GitHub/brett19</a></td><td><a href="http://twitter.com/brett19x">Twitter/@brett19x</a></td></tr>
<tr><th align="left">Ben Noordhuis</th><td><a href="https://github.com/bnoordhuis">GitHub/bnoordhuis</a></td><td><a href="http://twitter.com/bnoordhuis">Twitter/@bnoordhuis</a></td></tr>
<tr><th align="left">David Siegel</th><td><a href="https://github.com/agnat">GitHub/agnat</a></td><td><a href="http://twitter.com/agnat">Twitter/@agnat</a></td></tr>
<tr><th align="left">Michael Ira Krufky</th><td><a href="https://github.com/mkrufky">GitHub/mkrufky</a></td><td><a href="http://twitter.com/mkrufky">Twitter/@mkrufky</a></td></tr>
</tbody></table>
## Licence &amp; copyright
Copyright (c) 2018 NAN WG Members / Collaborators (listed above).
Native Abstractions for Node.js is licensed under an MIT license. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE file for more details.

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## Asynchronous work helpers
`Nan::AsyncWorker`, `Nan::AsyncProgressWorker` and `Nan::AsyncProgressQueueWorker` are helper classes that make working with asynchronous code easier.
- <a href="#api_nan_async_worker"><b><code>Nan::AsyncWorker</code></b></a>
- <a href="#api_nan_async_progress_worker"><b><code>Nan::AsyncProgressWorkerBase &amp; Nan::AsyncProgressWorker</code></b></a>
- <a href="#api_nan_async_progress_queue_worker"><b><code>Nan::AsyncProgressQueueWorker</code></b></a>
- <a href="#api_nan_async_queue_worker"><b><code>Nan::AsyncQueueWorker</code></b></a>
<a name="api_nan_async_worker"></a>
### Nan::AsyncWorker
`Nan::AsyncWorker` is an _abstract_ class that you can subclass to have much of the annoying asynchronous queuing and handling taken care of for you. It can even store arbitrary V8 objects for you and have them persist while the asynchronous work is in progress.
This class internally handles the details of creating an [`AsyncResource`][AsyncResource], and running the callback in the
correct async context. To be able to identify the async resources created by this class in async-hooks, provide a
`resource_name` to the constructor. It is recommended that the module name be used as a prefix to the `resource_name` to avoid
collisions in the names. For more details see [`AsyncResource`][AsyncResource] documentation. The `resource_name` needs to stay valid for the lifetime of the worker instance.
Definition:
```c++
class AsyncWorker {
public:
explicit AsyncWorker(Callback *callback_, const char* resource_name = "nan:AsyncWorker");
virtual ~AsyncWorker();
virtual void WorkComplete();
void SaveToPersistent(const char *key, const v8::Local<v8::Value> &value);
void SaveToPersistent(const v8::Local<v8::String> &key,
const v8::Local<v8::Value> &value);
void SaveToPersistent(uint32_t index,
const v8::Local<v8::Value> &value);
v8::Local<v8::Value> GetFromPersistent(const char *key) const;
v8::Local<v8::Value> GetFromPersistent(const v8::Local<v8::String> &key) const;
v8::Local<v8::Value> GetFromPersistent(uint32_t index) const;
virtual void Execute() = 0;
uv_work_t request;
virtual void Destroy();
protected:
Persistent<v8::Object> persistentHandle;
Callback *callback;
virtual void HandleOKCallback();
virtual void HandleErrorCallback();
void SetErrorMessage(const char *msg);
const char* ErrorMessage();
};
```
<a name="api_nan_async_progress_worker"></a>
### Nan::AsyncProgressWorkerBase &amp; Nan::AsyncProgressWorker
`Nan::AsyncProgressWorkerBase` is an _abstract_ class template that extends `Nan::AsyncWorker` and adds additional progress reporting callbacks that can be used during the asynchronous work execution to provide progress data back to JavaScript.
Previously the definition of `Nan::AsyncProgressWorker` only allowed sending `const char` data. Now extending `Nan::AsyncProgressWorker` will yield an instance of the implicit `Nan::AsyncProgressWorkerBase` template with type `<char>` for compatibility.
`Nan::AsyncProgressWorkerBase` &amp; `Nan::AsyncProgressWorker` is intended for best-effort delivery of nonessential progress messages, e.g. a progress bar. The last event sent before the main thread is woken will be delivered.
Definition:
```c++
template<class T>
class AsyncProgressWorkerBase<T> : public AsyncWorker {
public:
explicit AsyncProgressWorkerBase(Callback *callback_, const char* resource_name = ...);
virtual ~AsyncProgressWorkerBase();
void WorkProgress();
class ExecutionProgress {
public:
void Signal() const;
void Send(const T* data, size_t count) const;
};
virtual void Execute(const ExecutionProgress& progress) = 0;
virtual void HandleProgressCallback(const T *data, size_t count) = 0;
virtual void Destroy();
};
typedef AsyncProgressWorkerBase<T> AsyncProgressWorker;
```
<a name="api_nan_async_progress_queue_worker"></a>
### Nan::AsyncProgressQueueWorker
`Nan::AsyncProgressQueueWorker` is an _abstract_ class template that extends `Nan::AsyncWorker` and adds additional progress reporting callbacks that can be used during the asynchronous work execution to provide progress data back to JavaScript.
`Nan::AsyncProgressQueueWorker` behaves exactly the same as `Nan::AsyncProgressWorker`, except all events are queued and delivered to the main thread.
Definition:
```c++
template<class T>
class AsyncProgressQueueWorker<T> : public AsyncWorker {
public:
explicit AsyncProgressQueueWorker(Callback *callback_, const char* resource_name = "nan:AsyncProgressQueueWorker");
virtual ~AsyncProgressQueueWorker();
void WorkProgress();
class ExecutionProgress {
public:
void Send(const T* data, size_t count) const;
};
virtual void Execute(const ExecutionProgress& progress) = 0;
virtual void HandleProgressCallback(const T *data, size_t count) = 0;
virtual void Destroy();
};
```
<a name="api_nan_async_queue_worker"></a>
### Nan::AsyncQueueWorker
`Nan::AsyncQueueWorker` will run a `Nan::AsyncWorker` asynchronously via libuv. Both the `execute` and `after_work` steps are taken care of for you. Most of the logic for this is embedded in `Nan::AsyncWorker`.
Definition:
```c++
void AsyncQueueWorker(AsyncWorker *);
```
[AsyncResource]: node_misc.md#api_nan_asyncresource

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## Buffers
NAN's `node::Buffer` helpers exist as the API has changed across supported Node versions. Use these methods to ensure compatibility.
- <a href="#api_nan_new_buffer"><b><code>Nan::NewBuffer()</code></b></a>
- <a href="#api_nan_copy_buffer"><b><code>Nan::CopyBuffer()</code></b></a>
- <a href="#api_nan_free_callback"><b><code>Nan::FreeCallback()</code></b></a>
<a name="api_nan_new_buffer"></a>
### Nan::NewBuffer()
Allocate a new `node::Buffer` object with the specified size and optional data. Calls `node::Buffer::New()`.
Note that when creating a `Buffer` using `Nan::NewBuffer()` and an existing `char*`, it is assumed that the ownership of the pointer is being transferred to the new `Buffer` for management.
When a `node::Buffer` instance is garbage collected and a `FreeCallback` has not been specified, `data` will be disposed of via a call to `free()`.
You _must not_ free the memory space manually once you have created a `Buffer` in this way.
Signature:
```c++
Nan::MaybeLocal<v8::Object> Nan::NewBuffer(uint32_t size)
Nan::MaybeLocal<v8::Object> Nan::NewBuffer(char* data, uint32_t size)
Nan::MaybeLocal<v8::Object> Nan::NewBuffer(char *data,
size_t length,
Nan::FreeCallback callback,
void *hint)
```
<a name="api_nan_copy_buffer"></a>
### Nan::CopyBuffer()
Similar to [`Nan::NewBuffer()`](#api_nan_new_buffer) except that an implicit memcpy will occur within Node. Calls `node::Buffer::Copy()`.
Management of the `char*` is left to the user, you should manually free the memory space if necessary as the new `Buffer` will have its own copy.
Signature:
```c++
Nan::MaybeLocal<v8::Object> Nan::CopyBuffer(const char *data, uint32_t size)
```
<a name="api_nan_free_callback"></a>
### Nan::FreeCallback()
A free callback that can be provided to [`Nan::NewBuffer()`](#api_nan_new_buffer).
The supplied callback will be invoked when the `Buffer` undergoes garbage collection.
Signature:
```c++
typedef void (*FreeCallback)(char *data, void *hint);
```

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## Nan::Callback
`Nan::Callback` makes it easier to use `v8::Function` handles as callbacks. A class that wraps a `v8::Function` handle, protecting it from garbage collection and making it particularly useful for storage and use across asynchronous execution.
- <a href="#api_nan_callback"><b><code>Nan::Callback</code></b></a>
<a name="api_nan_callback"></a>
### Nan::Callback
```c++
class Callback {
public:
Callback();
explicit Callback(const v8::Local<v8::Function> &fn);
~Callback();
bool operator==(const Callback &other) const;
bool operator!=(const Callback &other) const;
v8::Local<v8::Function> operator*() const;
MaybeLocal<v8::Value> operator()(AsyncResource* async_resource,
v8::Local<v8::Object> target,
int argc = 0,
v8::Local<v8::Value> argv[] = 0) const;
MaybeLocal<v8::Value> operator()(AsyncResource* async_resource,
int argc = 0,
v8::Local<v8::Value> argv[] = 0) const;
void SetFunction(const v8::Local<v8::Function> &fn);
v8::Local<v8::Function> GetFunction() const;
bool IsEmpty() const;
void Reset(const v8::Local<v8::Function> &fn);
void Reset();
MaybeLocal<v8::Value> Call(v8::Local<v8::Object> target,
int argc,
v8::Local<v8::Value> argv[],
AsyncResource* async_resource) const;
MaybeLocal<v8::Value> Call(int argc,
v8::Local<v8::Value> argv[],
AsyncResource* async_resource) const;
// Deprecated versions. Use the versions that accept an async_resource instead
// as they run the callback in the correct async context as specified by the
// resource. If you want to call a synchronous JS function (i.e. on a
// non-empty JS stack), you can use Nan::Call instead.
v8::Local<v8::Value> operator()(v8::Local<v8::Object> target,
int argc = 0,
v8::Local<v8::Value> argv[] = 0) const;
v8::Local<v8::Value> operator()(int argc = 0,
v8::Local<v8::Value> argv[] = 0) const;
v8::Local<v8::Value> Call(v8::Local<v8::Object> target,
int argc,
v8::Local<v8::Value> argv[]) const;
v8::Local<v8::Value> Call(int argc, v8::Local<v8::Value> argv[]) const;
};
```
Example usage:
```c++
v8::Local<v8::Function> function;
Nan::Callback callback(function);
callback.Call(0, 0);
```

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## Converters
NAN contains functions that convert `v8::Value`s to other `v8::Value` types and native types. Since type conversion is not guaranteed to succeed, they return `Nan::Maybe` types. These converters can be used in place of `value->ToX()` and `value->XValue()` (where `X` is one of the types, e.g. `Boolean`) in a way that provides a consistent interface across V8 versions. Newer versions of V8 use the new `v8::Maybe` and `v8::MaybeLocal` types for these conversions, older versions don't have this functionality so it is provided by NAN.
- <a href="#api_nan_to"><b><code>Nan::To()</code></b></a>
<a name="api_nan_to"></a>
### Nan::To()
Converts a `v8::Local<v8::Value>` to a different subtype of `v8::Value` or to a native data type. Returns a `Nan::MaybeLocal<>` or a `Nan::Maybe<>` accordingly.
See [maybe_types.md](./maybe_types.md) for more information on `Nan::Maybe` types.
Signatures:
```c++
// V8 types
Nan::MaybeLocal<v8::Boolean> Nan::To<v8::Boolean>(v8::Local<v8::Value> val);
Nan::MaybeLocal<v8::Int32> Nan::To<v8::Int32>(v8::Local<v8::Value> val);
Nan::MaybeLocal<v8::Integer> Nan::To<v8::Integer>(v8::Local<v8::Value> val);
Nan::MaybeLocal<v8::Object> Nan::To<v8::Object>(v8::Local<v8::Value> val);
Nan::MaybeLocal<v8::Number> Nan::To<v8::Number>(v8::Local<v8::Value> val);
Nan::MaybeLocal<v8::String> Nan::To<v8::String>(v8::Local<v8::Value> val);
Nan::MaybeLocal<v8::Uint32> Nan::To<v8::Uint32>(v8::Local<v8::Value> val);
// Native types
Nan::Maybe<bool> Nan::To<bool>(v8::Local<v8::Value> val);
Nan::Maybe<double> Nan::To<double>(v8::Local<v8::Value> val);
Nan::Maybe<int32_t> Nan::To<int32_t>(v8::Local<v8::Value> val);
Nan::Maybe<int64_t> Nan::To<int64_t>(v8::Local<v8::Value> val);
Nan::Maybe<uint32_t> Nan::To<uint32_t>(v8::Local<v8::Value> val);
```
### Example
```c++
v8::Local<v8::Value> val;
Nan::MaybeLocal<v8::String> str = Nan::To<v8::String>(val);
Nan::Maybe<double> d = Nan::To<double>(val);
```

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## Errors
NAN includes helpers for creating, throwing and catching Errors as much of this functionality varies across the supported versions of V8 and must be abstracted.
Note that an Error object is simply a specialized form of `v8::Value`.
Also consult the V8 Embedders Guide section on [Exceptions](https://developers.google.com/v8/embed#exceptions) for more information.
- <a href="#api_nan_error"><b><code>Nan::Error()</code></b></a>
- <a href="#api_nan_range_error"><b><code>Nan::RangeError()</code></b></a>
- <a href="#api_nan_reference_error"><b><code>Nan::ReferenceError()</code></b></a>
- <a href="#api_nan_syntax_error"><b><code>Nan::SyntaxError()</code></b></a>
- <a href="#api_nan_type_error"><b><code>Nan::TypeError()</code></b></a>
- <a href="#api_nan_throw_error"><b><code>Nan::ThrowError()</code></b></a>
- <a href="#api_nan_throw_range_error"><b><code>Nan::ThrowRangeError()</code></b></a>
- <a href="#api_nan_throw_reference_error"><b><code>Nan::ThrowReferenceError()</code></b></a>
- <a href="#api_nan_throw_syntax_error"><b><code>Nan::ThrowSyntaxError()</code></b></a>
- <a href="#api_nan_throw_type_error"><b><code>Nan::ThrowTypeError()</code></b></a>
- <a href="#api_nan_fatal_exception"><b><code>Nan::FatalException()</code></b></a>
- <a href="#api_nan_errno_exception"><b><code>Nan::ErrnoException()</code></b></a>
- <a href="#api_nan_try_catch"><b><code>Nan::TryCatch</code></b></a>
<a name="api_nan_error"></a>
### Nan::Error()
Create a new Error object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
Note that an Error object is simply a specialized form of `v8::Value`.
Signature:
```c++
v8::Local<v8::Value> Nan::Error(const char *msg);
v8::Local<v8::Value> Nan::Error(v8::Local<v8::String> msg);
```
<a name="api_nan_range_error"></a>
### Nan::RangeError()
Create a new RangeError object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
Note that an RangeError object is simply a specialized form of `v8::Value`.
Signature:
```c++
v8::Local<v8::Value> Nan::RangeError(const char *msg);
v8::Local<v8::Value> Nan::RangeError(v8::Local<v8::String> msg);
```
<a name="api_nan_reference_error"></a>
### Nan::ReferenceError()
Create a new ReferenceError object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
Note that an ReferenceError object is simply a specialized form of `v8::Value`.
Signature:
```c++
v8::Local<v8::Value> Nan::ReferenceError(const char *msg);
v8::Local<v8::Value> Nan::ReferenceError(v8::Local<v8::String> msg);
```
<a name="api_nan_syntax_error"></a>
### Nan::SyntaxError()
Create a new SyntaxError object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
Note that an SyntaxError object is simply a specialized form of `v8::Value`.
Signature:
```c++
v8::Local<v8::Value> Nan::SyntaxError(const char *msg);
v8::Local<v8::Value> Nan::SyntaxError(v8::Local<v8::String> msg);
```
<a name="api_nan_type_error"></a>
### Nan::TypeError()
Create a new TypeError object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
Note that an TypeError object is simply a specialized form of `v8::Value`.
Signature:
```c++
v8::Local<v8::Value> Nan::TypeError(const char *msg);
v8::Local<v8::Value> Nan::TypeError(v8::Local<v8::String> msg);
```
<a name="api_nan_throw_error"></a>
### Nan::ThrowError()
Throw an Error object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new Error object will be created.
Signature:
```c++
void Nan::ThrowError(const char *msg);
void Nan::ThrowError(v8::Local<v8::String> msg);
void Nan::ThrowError(v8::Local<v8::Value> error);
```
<a name="api_nan_throw_range_error"></a>
### Nan::ThrowRangeError()
Throw an RangeError object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new RangeError object will be created.
Signature:
```c++
void Nan::ThrowRangeError(const char *msg);
void Nan::ThrowRangeError(v8::Local<v8::String> msg);
void Nan::ThrowRangeError(v8::Local<v8::Value> error);
```
<a name="api_nan_throw_reference_error"></a>
### Nan::ThrowReferenceError()
Throw an ReferenceError object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new ReferenceError object will be created.
Signature:
```c++
void Nan::ThrowReferenceError(const char *msg);
void Nan::ThrowReferenceError(v8::Local<v8::String> msg);
void Nan::ThrowReferenceError(v8::Local<v8::Value> error);
```
<a name="api_nan_throw_syntax_error"></a>
### Nan::ThrowSyntaxError()
Throw an SyntaxError object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new SyntaxError object will be created.
Signature:
```c++
void Nan::ThrowSyntaxError(const char *msg);
void Nan::ThrowSyntaxError(v8::Local<v8::String> msg);
void Nan::ThrowSyntaxError(v8::Local<v8::Value> error);
```
<a name="api_nan_throw_type_error"></a>
### Nan::ThrowTypeError()
Throw an TypeError object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new TypeError object will be created.
Signature:
```c++
void Nan::ThrowTypeError(const char *msg);
void Nan::ThrowTypeError(v8::Local<v8::String> msg);
void Nan::ThrowTypeError(v8::Local<v8::Value> error);
```
<a name="api_nan_fatal_exception"></a>
### Nan::FatalException()
Replaces `node::FatalException()` which has a different API across supported versions of Node. For use with [`Nan::TryCatch`](#api_nan_try_catch).
Signature:
```c++
void Nan::FatalException(const Nan::TryCatch& try_catch);
```
<a name="api_nan_errno_exception"></a>
### Nan::ErrnoException()
Replaces `node::ErrnoException()` which has a different API across supported versions of Node.
Signature:
```c++
v8::Local<v8::Value> Nan::ErrnoException(int errorno,
const char* syscall = NULL,
const char* message = NULL,
const char* path = NULL);
```
<a name="api_nan_try_catch"></a>
### Nan::TryCatch
A simple wrapper around [`v8::TryCatch`](https://v8docs.nodesource.com/node-8.16/d4/dc6/classv8_1_1_try_catch.html) compatible with all supported versions of V8. Can be used as a direct replacement in most cases. See also [`Nan::FatalException()`](#api_nan_fatal_exception) for an internal use compatible with `node::FatalException`.
Signature:
```c++
class Nan::TryCatch {
public:
Nan::TryCatch();
bool HasCaught() const;
bool CanContinue() const;
v8::Local<v8::Value> ReThrow();
v8::Local<v8::Value> Exception() const;
// Nan::MaybeLocal for older versions of V8
v8::MaybeLocal<v8::Value> StackTrace() const;
v8::Local<v8::Message> Message() const;
void Reset();
void SetVerbose(bool value);
void SetCaptureMessage(bool value);
};
```

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## JSON
The _JSON_ object provides the C++ versions of the methods offered by the `JSON` object in javascript. V8 exposes these methods via the `v8::JSON` object.
- <a href="#api_nan_json_parse"><b><code>Nan::JSON.Parse</code></b></a>
- <a href="#api_nan_json_stringify"><b><code>Nan::JSON.Stringify</code></b></a>
Refer to the V8 JSON object in the [V8 documentation](https://v8docs.nodesource.com/node-8.16/da/d6f/classv8_1_1_j_s_o_n.html) for more information about these methods and their arguments.
<a name="api_nan_json_parse"></a>
### Nan::JSON.Parse
A simple wrapper around [`v8::JSON::Parse`](https://v8docs.nodesource.com/node-8.16/da/d6f/classv8_1_1_j_s_o_n.html#a936310d2540fb630ed37d3ee3ffe4504).
Definition:
```c++
Nan::MaybeLocal<v8::Value> Nan::JSON::Parse(v8::Local<v8::String> json_string);
```
Use `JSON.Parse(json_string)` to parse a string into a `v8::Value`.
Example:
```c++
v8::Local<v8::String> json_string = Nan::New("{ \"JSON\": \"object\" }").ToLocalChecked();
Nan::JSON NanJSON;
Nan::MaybeLocal<v8::Value> result = NanJSON.Parse(json_string);
if (!result.IsEmpty()) {
v8::Local<v8::Value> val = result.ToLocalChecked();
}
```
<a name="api_nan_json_stringify"></a>
### Nan::JSON.Stringify
A simple wrapper around [`v8::JSON::Stringify`](https://v8docs.nodesource.com/node-8.16/da/d6f/classv8_1_1_j_s_o_n.html#a44b255c3531489ce43f6110209138860).
Definition:
```c++
Nan::MaybeLocal<v8::String> Nan::JSON::Stringify(v8::Local<v8::Object> json_object, v8::Local<v8::String> gap = v8::Local<v8::String>());
```
Use `JSON.Stringify(value)` to stringify a `v8::Object`.
Example:
```c++
// using `v8::Local<v8::Value> val` from the `JSON::Parse` example
v8::Local<v8::Object> obj = Nan::To<v8::Object>(val).ToLocalChecked();
Nan::JSON NanJSON;
Nan::MaybeLocal<v8::String> result = NanJSON.Stringify(obj);
if (!result.IsEmpty()) {
v8::Local<v8::String> stringified = result.ToLocalChecked();
}
```

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## Maybe Types
The `Nan::MaybeLocal` and `Nan::Maybe` types are monads that encapsulate `v8::Local` handles that _may be empty_.
* **Maybe Types**
- <a href="#api_nan_maybe_local"><b><code>Nan::MaybeLocal</code></b></a>
- <a href="#api_nan_maybe"><b><code>Nan::Maybe</code></b></a>
- <a href="#api_nan_nothing"><b><code>Nan::Nothing</code></b></a>
- <a href="#api_nan_just"><b><code>Nan::Just</code></b></a>
* **Maybe Helpers**
- <a href="#api_nan_call"><b><code>Nan::Call()</code></b></a>
- <a href="#api_nan_to_detail_string"><b><code>Nan::ToDetailString()</code></b></a>
- <a href="#api_nan_to_array_index"><b><code>Nan::ToArrayIndex()</code></b></a>
- <a href="#api_nan_equals"><b><code>Nan::Equals()</code></b></a>
- <a href="#api_nan_new_instance"><b><code>Nan::NewInstance()</code></b></a>
- <a href="#api_nan_get_function"><b><code>Nan::GetFunction()</code></b></a>
- <a href="#api_nan_set"><b><code>Nan::Set()</code></b></a>
- <a href="#api_nan_define_own_property"><b><code>Nan::DefineOwnProperty()</code></b></a>
- <a href="#api_nan_force_set"><del><b><code>Nan::ForceSet()</code></b></del></a>
- <a href="#api_nan_get"><b><code>Nan::Get()</code></b></a>
- <a href="#api_nan_get_property_attribute"><b><code>Nan::GetPropertyAttributes()</code></b></a>
- <a href="#api_nan_has"><b><code>Nan::Has()</code></b></a>
- <a href="#api_nan_delete"><b><code>Nan::Delete()</code></b></a>
- <a href="#api_nan_get_property_names"><b><code>Nan::GetPropertyNames()</code></b></a>
- <a href="#api_nan_get_own_property_names"><b><code>Nan::GetOwnPropertyNames()</code></b></a>
- <a href="#api_nan_set_prototype"><b><code>Nan::SetPrototype()</code></b></a>
- <a href="#api_nan_object_proto_to_string"><b><code>Nan::ObjectProtoToString()</code></b></a>
- <a href="#api_nan_has_own_property"><b><code>Nan::HasOwnProperty()</code></b></a>
- <a href="#api_nan_has_real_named_property"><b><code>Nan::HasRealNamedProperty()</code></b></a>
- <a href="#api_nan_has_real_indexed_property"><b><code>Nan::HasRealIndexedProperty()</code></b></a>
- <a href="#api_nan_has_real_named_callback_property"><b><code>Nan::HasRealNamedCallbackProperty()</code></b></a>
- <a href="#api_nan_get_real_named_property_in_prototype_chain"><b><code>Nan::GetRealNamedPropertyInPrototypeChain()</code></b></a>
- <a href="#api_nan_get_real_named_property"><b><code>Nan::GetRealNamedProperty()</code></b></a>
- <a href="#api_nan_call_as_function"><b><code>Nan::CallAsFunction()</code></b></a>
- <a href="#api_nan_call_as_constructor"><b><code>Nan::CallAsConstructor()</code></b></a>
- <a href="#api_nan_get_source_line"><b><code>Nan::GetSourceLine()</code></b></a>
- <a href="#api_nan_get_line_number"><b><code>Nan::GetLineNumber()</code></b></a>
- <a href="#api_nan_get_start_column"><b><code>Nan::GetStartColumn()</code></b></a>
- <a href="#api_nan_get_end_column"><b><code>Nan::GetEndColumn()</code></b></a>
- <a href="#api_nan_clone_element_at"><b><code>Nan::CloneElementAt()</code></b></a>
- <a href="#api_nan_has_private"><b><code>Nan::HasPrivate()</code></b></a>
- <a href="#api_nan_get_private"><b><code>Nan::GetPrivate()</code></b></a>
- <a href="#api_nan_set_private"><b><code>Nan::SetPrivate()</code></b></a>
- <a href="#api_nan_delete_private"><b><code>Nan::DeletePrivate()</code></b></a>
- <a href="#api_nan_make_maybe"><b><code>Nan::MakeMaybe()</code></b></a>
<a name="api_nan_maybe_local"></a>
### Nan::MaybeLocal
A `Nan::MaybeLocal<T>` is a wrapper around [`v8::Local<T>`](https://v8docs.nodesource.com/node-8.16/de/deb/classv8_1_1_local.html) that enforces a check that determines whether the `v8::Local<T>` is empty before it can be used.
If an API method returns a `Nan::MaybeLocal`, the API method can potentially fail either because an exception is thrown, or because an exception is pending, e.g. because a previous API call threw an exception that hasn't been caught yet, or because a `v8::TerminateExecution` exception was thrown. In that case, an empty `Nan::MaybeLocal` is returned.
Definition:
```c++
template<typename T> class Nan::MaybeLocal {
public:
MaybeLocal();
template<typename S> MaybeLocal(v8::Local<S> that);
bool IsEmpty() const;
template<typename S> bool ToLocal(v8::Local<S> *out);
// Will crash if the MaybeLocal<> is empty.
v8::Local<T> ToLocalChecked();
template<typename S> v8::Local<S> FromMaybe(v8::Local<S> default_value) const;
};
```
See the documentation for [`v8::MaybeLocal`](https://v8docs.nodesource.com/node-8.16/d8/d7d/classv8_1_1_maybe_local.html) for further details.
<a name="api_nan_maybe"></a>
### Nan::Maybe
A simple `Nan::Maybe` type, representing an object which may or may not have a value, see https://hackage.haskell.org/package/base/docs/Data-Maybe.html.
If an API method returns a `Nan::Maybe<>`, the API method can potentially fail either because an exception is thrown, or because an exception is pending, e.g. because a previous API call threw an exception that hasn't been caught yet, or because a `v8::TerminateExecution` exception was thrown. In that case, a "Nothing" value is returned.
Definition:
```c++
template<typename T> class Nan::Maybe {
public:
bool IsNothing() const;
bool IsJust() const;
// Will crash if the Maybe<> is nothing.
T FromJust();
T FromMaybe(const T& default_value);
bool operator==(const Maybe &other);
bool operator!=(const Maybe &other);
};
```
See the documentation for [`v8::Maybe`](https://v8docs.nodesource.com/node-8.16/d9/d4b/classv8_1_1_maybe.html) for further details.
<a name="api_nan_nothing"></a>
### Nan::Nothing
Construct an empty `Nan::Maybe` type representing _nothing_.
```c++
template<typename T> Nan::Maybe<T> Nan::Nothing();
```
<a name="api_nan_just"></a>
### Nan::Just
Construct a `Nan::Maybe` type representing _just_ a value.
```c++
template<typename T> Nan::Maybe<T> Nan::Just(const T &t);
```
<a name="api_nan_call"></a>
### Nan::Call()
A helper method for calling a synchronous [`v8::Function#Call()`](https://v8docs.nodesource.com/node-8.16/d5/d54/classv8_1_1_function.html#a9c3d0e4e13ddd7721fce238aa5b94a11) in a way compatible across supported versions of V8.
For asynchronous callbacks, use Nan::Callback::Call along with an AsyncResource.
Signature:
```c++
Nan::MaybeLocal<v8::Value> Nan::Call(v8::Local<v8::Function> fun, v8::Local<v8::Object> recv, int argc, v8::Local<v8::Value> argv[]);
Nan::MaybeLocal<v8::Value> Nan::Call(const Nan::Callback& callback, v8::Local<v8::Object> recv,
int argc, v8::Local<v8::Value> argv[]);
Nan::MaybeLocal<v8::Value> Nan::Call(const Nan::Callback& callback, int argc, v8::Local<v8::Value> argv[]);
```
<a name="api_nan_to_detail_string"></a>
### Nan::ToDetailString()
A helper method for calling [`v8::Value#ToDetailString()`](https://v8docs.nodesource.com/node-8.16/dc/d0a/classv8_1_1_value.html#a2f9770296dc2c8d274bc8cc0dca243e5) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::String> Nan::ToDetailString(v8::Local<v8::Value> val);
```
<a name="api_nan_to_array_index"></a>
### Nan::ToArrayIndex()
A helper method for calling [`v8::Value#ToArrayIndex()`](https://v8docs.nodesource.com/node-8.16/dc/d0a/classv8_1_1_value.html#acc5bbef3c805ec458470c0fcd6f13493) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Uint32> Nan::ToArrayIndex(v8::Local<v8::Value> val);
```
<a name="api_nan_equals"></a>
### Nan::Equals()
A helper method for calling [`v8::Value#Equals()`](https://v8docs.nodesource.com/node-8.16/dc/d0a/classv8_1_1_value.html#a08fba1d776a59bbf6864b25f9152c64b) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::Equals(v8::Local<v8::Value> a, v8::Local<v8::Value>(b));
```
<a name="api_nan_new_instance"></a>
### Nan::NewInstance()
A helper method for calling [`v8::Function#NewInstance()`](https://v8docs.nodesource.com/node-8.16/d5/d54/classv8_1_1_function.html#ae477558b10c14b76ed00e8dbab44ce5b) and [`v8::ObjectTemplate#NewInstance()`](https://v8docs.nodesource.com/node-8.16/db/d5f/classv8_1_1_object_template.html#ad605a7543cfbc5dab54cdb0883d14ae4) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Object> Nan::NewInstance(v8::Local<v8::Function> h);
Nan::MaybeLocal<v8::Object> Nan::NewInstance(v8::Local<v8::Function> h, int argc, v8::Local<v8::Value> argv[]);
Nan::MaybeLocal<v8::Object> Nan::NewInstance(v8::Local<v8::ObjectTemplate> h);
```
<a name="api_nan_get_function"></a>
### Nan::GetFunction()
A helper method for calling [`v8::FunctionTemplate#GetFunction()`](https://v8docs.nodesource.com/node-8.16/d8/d83/classv8_1_1_function_template.html#a56d904662a86eca78da37d9bb0ed3705) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Function> Nan::GetFunction(v8::Local<v8::FunctionTemplate> t);
```
<a name="api_nan_set"></a>
### Nan::Set()
A helper method for calling [`v8::Object#Set()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a67604ea3734f170c66026064ea808f20) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::Set(v8::Local<v8::Object> obj,
v8::Local<v8::Value> key,
v8::Local<v8::Value> value)
Nan::Maybe<bool> Nan::Set(v8::Local<v8::Object> obj,
uint32_t index,
v8::Local<v8::Value> value);
```
<a name="api_nan_define_own_property"></a>
### Nan::DefineOwnProperty()
A helper method for calling [`v8::Object#DefineOwnProperty()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a6f76b2ed605cb8f9185b92de0033a820) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::DefineOwnProperty(v8::Local<v8::Object> obj,
v8::Local<v8::String> key,
v8::Local<v8::Value> value,
v8::PropertyAttribute attribs = v8::None);
```
<a name="api_nan_force_set"></a>
### <del>Nan::ForceSet()</del>
Deprecated, use <a href="#api_nan_define_own_property"><code>Nan::DefineOwnProperty()</code></a>.
<del>A helper method for calling [`v8::Object#ForceSet()`](https://v8docs.nodesource.com/node-0.12/db/d85/classv8_1_1_object.html#acfbdfd7427b516ebdb5c47c4df5ed96c) in a way compatible across supported versions of V8.</del>
Signature:
```c++
NAN_DEPRECATED Nan::Maybe<bool> Nan::ForceSet(v8::Local<v8::Object> obj,
v8::Local<v8::Value> key,
v8::Local<v8::Value> value,
v8::PropertyAttribute attribs = v8::None);
```
<a name="api_nan_get"></a>
### Nan::Get()
A helper method for calling [`v8::Object#Get()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a2565f03e736694f6b1e1cf22a0b4eac2) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Value> Nan::Get(v8::Local<v8::Object> obj,
v8::Local<v8::Value> key);
Nan::MaybeLocal<v8::Value> Nan::Get(v8::Local<v8::Object> obj, uint32_t index);
```
<a name="api_nan_get_property_attribute"></a>
### Nan::GetPropertyAttributes()
A helper method for calling [`v8::Object#GetPropertyAttributes()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a9b898894da3d1db2714fd9325a54fe57) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<v8::PropertyAttribute> Nan::GetPropertyAttributes(
v8::Local<v8::Object> obj,
v8::Local<v8::Value> key);
```
<a name="api_nan_has"></a>
### Nan::Has()
A helper method for calling [`v8::Object#Has()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#ab3c3d89ea7c2f9afd08965bd7299a41d) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::Has(v8::Local<v8::Object> obj, v8::Local<v8::String> key);
Nan::Maybe<bool> Nan::Has(v8::Local<v8::Object> obj, uint32_t index);
```
<a name="api_nan_delete"></a>
### Nan::Delete()
A helper method for calling [`v8::Object#Delete()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a48e4a19b2cedff867eecc73ddb7d377f) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::Delete(v8::Local<v8::Object> obj,
v8::Local<v8::String> key);
Nan::Maybe<bool> Nan::Delete(v8::Local<v8::Object> obj, uint32_t index);
```
<a name="api_nan_get_property_names"></a>
### Nan::GetPropertyNames()
A helper method for calling [`v8::Object#GetPropertyNames()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#aced885270cfd2c956367b5eedc7fbfe8) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Array> Nan::GetPropertyNames(v8::Local<v8::Object> obj);
```
<a name="api_nan_get_own_property_names"></a>
### Nan::GetOwnPropertyNames()
A helper method for calling [`v8::Object#GetOwnPropertyNames()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a79a6e4d66049b9aa648ed4dfdb23e6eb) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Array> Nan::GetOwnPropertyNames(v8::Local<v8::Object> obj);
```
<a name="api_nan_set_prototype"></a>
### Nan::SetPrototype()
A helper method for calling [`v8::Object#SetPrototype()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a442706b22fceda6e6d1f632122a9a9f4) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::SetPrototype(v8::Local<v8::Object> obj,
v8::Local<v8::Value> prototype);
```
<a name="api_nan_object_proto_to_string"></a>
### Nan::ObjectProtoToString()
A helper method for calling [`v8::Object#ObjectProtoToString()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#ab7a92b4dcf822bef72f6c0ac6fea1f0b) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::String> Nan::ObjectProtoToString(v8::Local<v8::Object> obj);
```
<a name="api_nan_has_own_property"></a>
### Nan::HasOwnProperty()
A helper method for calling [`v8::Object#HasOwnProperty()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#ab7b7245442ca6de1e1c145ea3fd653ff) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::HasOwnProperty(v8::Local<v8::Object> obj,
v8::Local<v8::String> key);
```
<a name="api_nan_has_real_named_property"></a>
### Nan::HasRealNamedProperty()
A helper method for calling [`v8::Object#HasRealNamedProperty()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#ad8b80a59c9eb3c1e6c3cd6c84571f767) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::HasRealNamedProperty(v8::Local<v8::Object> obj,
v8::Local<v8::String> key);
```
<a name="api_nan_has_real_indexed_property"></a>
### Nan::HasRealIndexedProperty()
A helper method for calling [`v8::Object#HasRealIndexedProperty()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#af94fc1135a5e74a2193fb72c3a1b9855) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::HasRealIndexedProperty(v8::Local<v8::Object> obj,
uint32_t index);
```
<a name="api_nan_has_real_named_callback_property"></a>
### Nan::HasRealNamedCallbackProperty()
A helper method for calling [`v8::Object#HasRealNamedCallbackProperty()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#af743b7ea132b89f84d34d164d0668811) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::HasRealNamedCallbackProperty(
v8::Local<v8::Object> obj,
v8::Local<v8::String> key);
```
<a name="api_nan_get_real_named_property_in_prototype_chain"></a>
### Nan::GetRealNamedPropertyInPrototypeChain()
A helper method for calling [`v8::Object#GetRealNamedPropertyInPrototypeChain()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a8700b1862e6b4783716964ba4d5e6172) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Value> Nan::GetRealNamedPropertyInPrototypeChain(
v8::Local<v8::Object> obj,
v8::Local<v8::String> key);
```
<a name="api_nan_get_real_named_property"></a>
### Nan::GetRealNamedProperty()
A helper method for calling [`v8::Object#GetRealNamedProperty()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a84471a824576a5994fdd0ffcbf99ccc0) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Value> Nan::GetRealNamedProperty(v8::Local<v8::Object> obj,
v8::Local<v8::String> key);
```
<a name="api_nan_call_as_function"></a>
### Nan::CallAsFunction()
A helper method for calling [`v8::Object#CallAsFunction()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#ad3ffc36f3dfc3592ce2a96bc047ee2cd) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Value> Nan::CallAsFunction(v8::Local<v8::Object> obj,
v8::Local<v8::Object> recv,
int argc,
v8::Local<v8::Value> argv[]);
```
<a name="api_nan_call_as_constructor"></a>
### Nan::CallAsConstructor()
A helper method for calling [`v8::Object#CallAsConstructor()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a50d571de50d0b0dfb28795619d07a01b) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Value> Nan::CallAsConstructor(v8::Local<v8::Object> obj,
int argc,
v8::Local<v8::Value> argv[]);
```
<a name="api_nan_get_source_line"></a>
### Nan::GetSourceLine()
A helper method for calling [`v8::Message#GetSourceLine()`](https://v8docs.nodesource.com/node-8.16/d9/d28/classv8_1_1_message.html#a849f7a6c41549d83d8159825efccd23a) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::String> Nan::GetSourceLine(v8::Local<v8::Message> msg);
```
<a name="api_nan_get_line_number"></a>
### Nan::GetLineNumber()
A helper method for calling [`v8::Message#GetLineNumber()`](https://v8docs.nodesource.com/node-8.16/d9/d28/classv8_1_1_message.html#adbe46c10a88a6565f2732a2d2adf99b9) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<int> Nan::GetLineNumber(v8::Local<v8::Message> msg);
```
<a name="api_nan_get_start_column"></a>
### Nan::GetStartColumn()
A helper method for calling [`v8::Message#GetStartColumn()`](https://v8docs.nodesource.com/node-8.16/d9/d28/classv8_1_1_message.html#a60ede616ba3822d712e44c7a74487ba6) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<int> Nan::GetStartColumn(v8::Local<v8::Message> msg);
```
<a name="api_nan_get_end_column"></a>
### Nan::GetEndColumn()
A helper method for calling [`v8::Message#GetEndColumn()`](https://v8docs.nodesource.com/node-8.16/d9/d28/classv8_1_1_message.html#aaa004cf19e529da980bc19fcb76d93be) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<int> Nan::GetEndColumn(v8::Local<v8::Message> msg);
```
<a name="api_nan_clone_element_at"></a>
### Nan::CloneElementAt()
A helper method for calling [`v8::Array#CloneElementAt()`](https://v8docs.nodesource.com/node-4.8/d3/d32/classv8_1_1_array.html#a1d3a878d4c1c7cae974dd50a1639245e) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Object> Nan::CloneElementAt(v8::Local<v8::Array> array, uint32_t index);
```
<a name="api_nan_has_private"></a>
### Nan::HasPrivate()
A helper method for calling [`v8::Object#HasPrivate()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#af68a0b98066cfdeb8f943e98a40ba08d) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::HasPrivate(v8::Local<v8::Object> object, v8::Local<v8::String> key);
```
<a name="api_nan_get_private"></a>
### Nan::GetPrivate()
A helper method for calling [`v8::Object#GetPrivate()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a169f2da506acbec34deadd9149a1925a) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Value> Nan::GetPrivate(v8::Local<v8::Object> object, v8::Local<v8::String> key);
```
<a name="api_nan_set_private"></a>
### Nan::SetPrivate()
A helper method for calling [`v8::Object#SetPrivate()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#ace1769b0f3b86bfe9fda1010916360ee) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::SetPrivate(v8::Local<v8::Object> object, v8::Local<v8::String> key, v8::Local<v8::Value> value);
```
<a name="api_nan_delete_private"></a>
### Nan::DeletePrivate()
A helper method for calling [`v8::Object#DeletePrivate()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a138bb32a304f3982be02ad499693b8fd) in a way compatible across supported versions of V8.
Signature:
```c++
Nan::Maybe<bool> Nan::DeletePrivate(v8::Local<v8::Object> object, v8::Local<v8::String> key);
```
<a name="api_nan_make_maybe"></a>
### Nan::MakeMaybe()
Wraps a `v8::Local<>` in a `Nan::MaybeLocal<>`. When called with a `Nan::MaybeLocal<>` it just returns its argument. This is useful in generic template code that builds on NAN.
Synopsis:
```c++
MaybeLocal<v8::Number> someNumber = MakeMaybe(New<v8::Number>(3.141592654));
MaybeLocal<v8::String> someString = MakeMaybe(New<v8::String>("probably"));
```
Signature:
```c++
template <typename T, template <typename> class MaybeMaybe>
Nan::MaybeLocal<T> Nan::MakeMaybe(MaybeMaybe<T> v);
```

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## JavaScript-accessible methods
A _template_ is a blueprint for JavaScript functions and objects in a context. You can use a template to wrap C++ functions and data structures within JavaScript objects so that they can be manipulated from JavaScript. See the V8 Embedders Guide section on [Templates](https://github.com/v8/v8/wiki/Embedder%27s-Guide#templates) for further information.
In order to expose functionality to JavaScript via a template, you must provide it to V8 in a form that it understands. Across the versions of V8 supported by NAN, JavaScript-accessible method signatures vary widely, NAN fully abstracts method declaration and provides you with an interface that is similar to the most recent V8 API but is backward-compatible with older versions that still use the now-deceased `v8::Argument` type.
* **Method argument types**
- <a href="#api_nan_function_callback_info"><b><code>Nan::FunctionCallbackInfo</code></b></a>
- <a href="#api_nan_property_callback_info"><b><code>Nan::PropertyCallbackInfo</code></b></a>
- <a href="#api_nan_return_value"><b><code>Nan::ReturnValue</code></b></a>
* **Method declarations**
- <a href="#api_nan_method"><b>Method declaration</b></a>
- <a href="#api_nan_getter"><b>Getter declaration</b></a>
- <a href="#api_nan_setter"><b>Setter declaration</b></a>
- <a href="#api_nan_property_getter"><b>Property getter declaration</b></a>
- <a href="#api_nan_property_setter"><b>Property setter declaration</b></a>
- <a href="#api_nan_property_enumerator"><b>Property enumerator declaration</b></a>
- <a href="#api_nan_property_deleter"><b>Property deleter declaration</b></a>
- <a href="#api_nan_property_query"><b>Property query declaration</b></a>
- <a href="#api_nan_index_getter"><b>Index getter declaration</b></a>
- <a href="#api_nan_index_setter"><b>Index setter declaration</b></a>
- <a href="#api_nan_index_enumerator"><b>Index enumerator declaration</b></a>
- <a href="#api_nan_index_deleter"><b>Index deleter declaration</b></a>
- <a href="#api_nan_index_query"><b>Index query declaration</b></a>
* Method and template helpers
- <a href="#api_nan_set_method"><b><code>Nan::SetMethod()</code></b></a>
- <a href="#api_nan_set_prototype_method"><b><code>Nan::SetPrototypeMethod()</code></b></a>
- <a href="#api_nan_set_accessor"><b><code>Nan::SetAccessor()</code></b></a>
- <a href="#api_nan_set_named_property_handler"><b><code>Nan::SetNamedPropertyHandler()</code></b></a>
- <a href="#api_nan_set_indexed_property_handler"><b><code>Nan::SetIndexedPropertyHandler()</code></b></a>
- <a href="#api_nan_set_template"><b><code>Nan::SetTemplate()</code></b></a>
- <a href="#api_nan_set_prototype_template"><b><code>Nan::SetPrototypeTemplate()</code></b></a>
- <a href="#api_nan_set_instance_template"><b><code>Nan::SetInstanceTemplate()</code></b></a>
- <a href="#api_nan_set_call_handler"><b><code>Nan::SetCallHandler()</code></b></a>
- <a href="#api_nan_set_call_as_function_handler"><b><code>Nan::SetCallAsFunctionHandler()</code></b></a>
<a name="api_nan_function_callback_info"></a>
### Nan::FunctionCallbackInfo
`Nan::FunctionCallbackInfo` should be used in place of [`v8::FunctionCallbackInfo`](https://v8docs.nodesource.com/node-8.16/dd/d0d/classv8_1_1_function_callback_info.html), even with older versions of Node where `v8::FunctionCallbackInfo` does not exist.
Definition:
```c++
template<typename T> class FunctionCallbackInfo {
public:
ReturnValue<T> GetReturnValue() const;
v8::Local<v8::Function> Callee(); // NOTE: Not available in NodeJS >= 10.0.0
v8::Local<v8::Value> Data();
v8::Local<v8::Object> Holder();
bool IsConstructCall();
int Length() const;
v8::Local<v8::Value> operator[](int i) const;
v8::Local<v8::Object> This() const;
v8::Isolate *GetIsolate() const;
};
```
See the [`v8::FunctionCallbackInfo`](https://v8docs.nodesource.com/node-8.16/dd/d0d/classv8_1_1_function_callback_info.html) documentation for usage details on these. See [`Nan::ReturnValue`](#api_nan_return_value) for further information on how to set a return value from methods.
**Note:** `FunctionCallbackInfo::Callee` is removed in Node.js after `10.0.0` because it is was deprecated in V8. Consider using `info.Data()` to pass any information you need.
<a name="api_nan_property_callback_info"></a>
### Nan::PropertyCallbackInfo
`Nan::PropertyCallbackInfo` should be used in place of [`v8::PropertyCallbackInfo`](https://v8docs.nodesource.com/node-8.16/d7/dc5/classv8_1_1_property_callback_info.html), even with older versions of Node where `v8::PropertyCallbackInfo` does not exist.
Definition:
```c++
template<typename T> class PropertyCallbackInfo : public PropertyCallbackInfoBase<T> {
public:
ReturnValue<T> GetReturnValue() const;
v8::Isolate* GetIsolate() const;
v8::Local<v8::Value> Data() const;
v8::Local<v8::Object> This() const;
v8::Local<v8::Object> Holder() const;
};
```
See the [`v8::PropertyCallbackInfo`](https://v8docs.nodesource.com/node-8.16/d7/dc5/classv8_1_1_property_callback_info.html) documentation for usage details on these. See [`Nan::ReturnValue`](#api_nan_return_value) for further information on how to set a return value from property accessor methods.
<a name="api_nan_return_value"></a>
### Nan::ReturnValue
`Nan::ReturnValue` is used in place of [`v8::ReturnValue`](https://v8docs.nodesource.com/node-8.16/da/da7/classv8_1_1_return_value.html) on both [`Nan::FunctionCallbackInfo`](#api_nan_function_callback_info) and [`Nan::PropertyCallbackInfo`](#api_nan_property_callback_info) as the return type of `GetReturnValue()`.
Example usage:
```c++
void EmptyArray(const Nan::FunctionCallbackInfo<v8::Value>& info) {
info.GetReturnValue().Set(Nan::New<v8::Array>());
}
```
Definition:
```c++
template<typename T> class ReturnValue {
public:
// Handle setters
template <typename S> void Set(const v8::Local<S> &handle);
template <typename S> void Set(const Nan::Global<S> &handle);
// Fast primitive setters
void Set(bool value);
void Set(double i);
void Set(int32_t i);
void Set(uint32_t i);
// Fast JS primitive setters
void SetNull();
void SetUndefined();
void SetEmptyString();
// Convenience getter for isolate
v8::Isolate *GetIsolate() const;
};
```
See the documentation on [`v8::ReturnValue`](https://v8docs.nodesource.com/node-8.16/da/da7/classv8_1_1_return_value.html) for further information on this.
<a name="api_nan_method"></a>
### Method declaration
JavaScript-accessible methods should be declared with the following signature to form a `Nan::FunctionCallback`:
```c++
typedef void(*FunctionCallback)(const FunctionCallbackInfo<v8::Value>&);
```
Example:
```c++
void MethodName(const Nan::FunctionCallbackInfo<v8::Value>& info) {
...
}
```
You do not need to declare a new `HandleScope` within a method as one is implicitly created for you.
**Example usage**
```c++
// .h:
class Foo : public Nan::ObjectWrap {
...
static void Bar(const Nan::FunctionCallbackInfo<v8::Value>& info);
static void Baz(const Nan::FunctionCallbackInfo<v8::Value>& info);
}
// .cc:
void Foo::Bar(const Nan::FunctionCallbackInfo<v8::Value>& info) {
...
}
void Foo::Baz(const Nan::FunctionCallbackInfo<v8::Value>& info) {
...
}
```
A helper macro `NAN_METHOD(methodname)` exists, compatible with NAN v1 method declarations.
**Example usage with `NAN_METHOD(methodname)`**
```c++
// .h:
class Foo : public Nan::ObjectWrap {
...
static NAN_METHOD(Bar);
static NAN_METHOD(Baz);
}
// .cc:
NAN_METHOD(Foo::Bar) {
...
}
NAN_METHOD(Foo::Baz) {
...
}
```
Use [`Nan::SetPrototypeMethod`](#api_nan_set_prototype_method) to attach a method to a JavaScript function prototype or [`Nan::SetMethod`](#api_nan_set_method) to attach a method directly on a JavaScript object.
<a name="api_nan_getter"></a>
### Getter declaration
JavaScript-accessible getters should be declared with the following signature to form a `Nan::GetterCallback`:
```c++
typedef void(*GetterCallback)(v8::Local<v8::String>,
const PropertyCallbackInfo<v8::Value>&);
```
Example:
```c++
void GetterName(v8::Local<v8::String> property,
const Nan::PropertyCallbackInfo<v8::Value>& info) {
...
}
```
You do not need to declare a new `HandleScope` within a getter as one is implicitly created for you.
A helper macro `NAN_GETTER(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on [Accessors](https://developers.google.com/v8/embed#accesssors).
<a name="api_nan_setter"></a>
### Setter declaration
JavaScript-accessible setters should be declared with the following signature to form a <b><code>Nan::SetterCallback</code></b>:
```c++
typedef void(*SetterCallback)(v8::Local<v8::String>,
v8::Local<v8::Value>,
const PropertyCallbackInfo<void>&);
```
Example:
```c++
void SetterName(v8::Local<v8::String> property,
v8::Local<v8::Value> value,
const Nan::PropertyCallbackInfo<void>& info) {
...
}
```
You do not need to declare a new `HandleScope` within a setter as one is implicitly created for you.
A helper macro `NAN_SETTER(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on [Accessors](https://developers.google.com/v8/embed#accesssors).
<a name="api_nan_property_getter"></a>
### Property getter declaration
JavaScript-accessible property getters should be declared with the following signature to form a <b><code>Nan::PropertyGetterCallback</code></b>:
```c++
typedef void(*PropertyGetterCallback)(v8::Local<v8::String>,
const PropertyCallbackInfo<v8::Value>&);
```
Example:
```c++
void PropertyGetterName(v8::Local<v8::String> property,
const Nan::PropertyCallbackInfo<v8::Value>& info) {
...
}
```
You do not need to declare a new `HandleScope` within a property getter as one is implicitly created for you.
A helper macro `NAN_PROPERTY_GETTER(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on named property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_property_setter"></a>
### Property setter declaration
JavaScript-accessible property setters should be declared with the following signature to form a <b><code>Nan::PropertySetterCallback</code></b>:
```c++
typedef void(*PropertySetterCallback)(v8::Local<v8::String>,
v8::Local<v8::Value>,
const PropertyCallbackInfo<v8::Value>&);
```
Example:
```c++
void PropertySetterName(v8::Local<v8::String> property,
v8::Local<v8::Value> value,
const Nan::PropertyCallbackInfo<v8::Value>& info);
```
You do not need to declare a new `HandleScope` within a property setter as one is implicitly created for you.
A helper macro `NAN_PROPERTY_SETTER(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on named property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_property_enumerator"></a>
### Property enumerator declaration
JavaScript-accessible property enumerators should be declared with the following signature to form a <b><code>Nan::PropertyEnumeratorCallback</code></b>:
```c++
typedef void(*PropertyEnumeratorCallback)(const PropertyCallbackInfo<v8::Array>&);
```
Example:
```c++
void PropertyEnumeratorName(const Nan::PropertyCallbackInfo<v8::Array>& info);
```
You do not need to declare a new `HandleScope` within a property enumerator as one is implicitly created for you.
A helper macro `NAN_PROPERTY_ENUMERATOR(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on named property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_property_deleter"></a>
### Property deleter declaration
JavaScript-accessible property deleters should be declared with the following signature to form a <b><code>Nan::PropertyDeleterCallback</code></b>:
```c++
typedef void(*PropertyDeleterCallback)(v8::Local<v8::String>,
const PropertyCallbackInfo<v8::Boolean>&);
```
Example:
```c++
void PropertyDeleterName(v8::Local<v8::String> property,
const Nan::PropertyCallbackInfo<v8::Boolean>& info);
```
You do not need to declare a new `HandleScope` within a property deleter as one is implicitly created for you.
A helper macro `NAN_PROPERTY_DELETER(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on named property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_property_query"></a>
### Property query declaration
JavaScript-accessible property query methods should be declared with the following signature to form a <b><code>Nan::PropertyQueryCallback</code></b>:
```c++
typedef void(*PropertyQueryCallback)(v8::Local<v8::String>,
const PropertyCallbackInfo<v8::Integer>&);
```
Example:
```c++
void PropertyQueryName(v8::Local<v8::String> property,
const Nan::PropertyCallbackInfo<v8::Integer>& info);
```
You do not need to declare a new `HandleScope` within a property query method as one is implicitly created for you.
A helper macro `NAN_PROPERTY_QUERY(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on named property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_index_getter"></a>
### Index getter declaration
JavaScript-accessible index getter methods should be declared with the following signature to form a <b><code>Nan::IndexGetterCallback</code></b>:
```c++
typedef void(*IndexGetterCallback)(uint32_t,
const PropertyCallbackInfo<v8::Value>&);
```
Example:
```c++
void IndexGetterName(uint32_t index, const PropertyCallbackInfo<v8::Value>& info);
```
You do not need to declare a new `HandleScope` within a index getter as one is implicitly created for you.
A helper macro `NAN_INDEX_GETTER(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on indexed property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_index_setter"></a>
### Index setter declaration
JavaScript-accessible index setter methods should be declared with the following signature to form a <b><code>Nan::IndexSetterCallback</code></b>:
```c++
typedef void(*IndexSetterCallback)(uint32_t,
v8::Local<v8::Value>,
const PropertyCallbackInfo<v8::Value>&);
```
Example:
```c++
void IndexSetterName(uint32_t index,
v8::Local<v8::Value> value,
const PropertyCallbackInfo<v8::Value>& info);
```
You do not need to declare a new `HandleScope` within a index setter as one is implicitly created for you.
A helper macro `NAN_INDEX_SETTER(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on indexed property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_index_enumerator"></a>
### Index enumerator declaration
JavaScript-accessible index enumerator methods should be declared with the following signature to form a <b><code>Nan::IndexEnumeratorCallback</code></b>:
```c++
typedef void(*IndexEnumeratorCallback)(const PropertyCallbackInfo<v8::Array>&);
```
Example:
```c++
void IndexEnumeratorName(const PropertyCallbackInfo<v8::Array>& info);
```
You do not need to declare a new `HandleScope` within a index enumerator as one is implicitly created for you.
A helper macro `NAN_INDEX_ENUMERATOR(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on indexed property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_index_deleter"></a>
### Index deleter declaration
JavaScript-accessible index deleter methods should be declared with the following signature to form a <b><code>Nan::IndexDeleterCallback</code></b>:
```c++
typedef void(*IndexDeleterCallback)(uint32_t,
const PropertyCallbackInfo<v8::Boolean>&);
```
Example:
```c++
void IndexDeleterName(uint32_t index, const PropertyCallbackInfo<v8::Boolean>& info);
```
You do not need to declare a new `HandleScope` within a index deleter as one is implicitly created for you.
A helper macro `NAN_INDEX_DELETER(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on indexed property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_index_query"></a>
### Index query declaration
JavaScript-accessible index query methods should be declared with the following signature to form a <b><code>Nan::IndexQueryCallback</code></b>:
```c++
typedef void(*IndexQueryCallback)(uint32_t,
const PropertyCallbackInfo<v8::Integer>&);
```
Example:
```c++
void IndexQueryName(uint32_t index, const PropertyCallbackInfo<v8::Integer>& info);
```
You do not need to declare a new `HandleScope` within a index query method as one is implicitly created for you.
A helper macro `NAN_INDEX_QUERY(methodname)` exists, compatible with NAN v1 method declarations.
Also see the V8 Embedders Guide documentation on indexed property [Interceptors](https://developers.google.com/v8/embed#interceptors).
<a name="api_nan_set_method"></a>
### Nan::SetMethod()
Sets a method with a given name directly on a JavaScript object where the method has the `Nan::FunctionCallback` signature (see <a href="#api_nan_method">Method declaration</a>).
Signature:
```c++
void Nan::SetMethod(v8::Local<v8::Object> recv,
const char *name,
Nan::FunctionCallback callback,
v8::Local<v8::Value> data = v8::Local<v8::Value>())
void Nan::SetMethod(v8::Local<v8::Template> templ,
const char *name,
Nan::FunctionCallback callback,
v8::Local<v8::Value> data = v8::Local<v8::Value>())
```
<a name="api_nan_set_prototype_method"></a>
### Nan::SetPrototypeMethod()
Sets a method with a given name on a `FunctionTemplate`'s prototype where the method has the `Nan::FunctionCallback` signature (see <a href="#api_nan_method">Method declaration</a>).
Signature:
```c++
void Nan::SetPrototypeMethod(v8::Local<v8::FunctionTemplate> recv,
const char* name,
Nan::FunctionCallback callback,
v8::Local<v8::Value> data = v8::Local<v8::Value>())
```
<a name="api_nan_set_accessor"></a>
### Nan::SetAccessor()
Sets getters and setters for a property with a given name on an `ObjectTemplate` or a plain `Object`. Accepts getters with the `Nan::GetterCallback` signature (see <a href="#api_nan_getter">Getter declaration</a>) and setters with the `Nan::SetterCallback` signature (see <a href="#api_nan_setter">Setter declaration</a>).
Signature:
```c++
void SetAccessor(v8::Local<v8::ObjectTemplate> tpl,
v8::Local<v8::String> name,
Nan::GetterCallback getter,
Nan::SetterCallback setter = 0,
v8::Local<v8::Value> data = v8::Local<v8::Value>(),
v8::AccessControl settings = v8::DEFAULT,
v8::PropertyAttribute attribute = v8::None,
imp::Sig signature = imp::Sig());
bool SetAccessor(v8::Local<v8::Object> obj,
v8::Local<v8::String> name,
Nan::GetterCallback getter,
Nan::SetterCallback setter = 0,
v8::Local<v8::Value> data = v8::Local<v8::Value>(),
v8::AccessControl settings = v8::DEFAULT,
v8::PropertyAttribute attribute = v8::None)
```
See the V8 [`ObjectTemplate#SetAccessor()`](https://v8docs.nodesource.com/node-8.16/db/d5f/classv8_1_1_object_template.html#aca0ed196f8a9adb1f68b1aadb6c9cd77) and [`Object#SetAccessor()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#ae91b3b56b357f285288c89fbddc46d1b) for further information about how to use `Nan::SetAccessor()`.
<a name="api_nan_set_named_property_handler"></a>
### Nan::SetNamedPropertyHandler()
Sets named property getters, setters, query, deleter and enumerator methods on an `ObjectTemplate`. Accepts:
* Property getters with the `Nan::PropertyGetterCallback` signature (see <a href="#api_nan_property_getter">Property getter declaration</a>)
* Property setters with the `Nan::PropertySetterCallback` signature (see <a href="#api_nan_property_setter">Property setter declaration</a>)
* Property query methods with the `Nan::PropertyQueryCallback` signature (see <a href="#api_nan_property_query">Property query declaration</a>)
* Property deleters with the `Nan::PropertyDeleterCallback` signature (see <a href="#api_nan_property_deleter">Property deleter declaration</a>)
* Property enumerators with the `Nan::PropertyEnumeratorCallback` signature (see <a href="#api_nan_property_enumerator">Property enumerator declaration</a>)
Signature:
```c++
void SetNamedPropertyHandler(v8::Local<v8::ObjectTemplate> tpl,
Nan::PropertyGetterCallback getter,
Nan::PropertySetterCallback setter = 0,
Nan::PropertyQueryCallback query = 0,
Nan::PropertyDeleterCallback deleter = 0,
Nan::PropertyEnumeratorCallback enumerator = 0,
v8::Local<v8::Value> data = v8::Local<v8::Value>())
```
See the V8 [`ObjectTemplate#SetNamedPropertyHandler()`](https://v8docs.nodesource.com/node-8.16/db/d5f/classv8_1_1_object_template.html#a33b3ebd7de641f6cc6414b7de01fc1c7) for further information about how to use `Nan::SetNamedPropertyHandler()`.
<a name="api_nan_set_indexed_property_handler"></a>
### Nan::SetIndexedPropertyHandler()
Sets indexed property getters, setters, query, deleter and enumerator methods on an `ObjectTemplate`. Accepts:
* Indexed property getters with the `Nan::IndexGetterCallback` signature (see <a href="#api_nan_index_getter">Index getter declaration</a>)
* Indexed property setters with the `Nan::IndexSetterCallback` signature (see <a href="#api_nan_index_setter">Index setter declaration</a>)
* Indexed property query methods with the `Nan::IndexQueryCallback` signature (see <a href="#api_nan_index_query">Index query declaration</a>)
* Indexed property deleters with the `Nan::IndexDeleterCallback` signature (see <a href="#api_nan_index_deleter">Index deleter declaration</a>)
* Indexed property enumerators with the `Nan::IndexEnumeratorCallback` signature (see <a href="#api_nan_index_enumerator">Index enumerator declaration</a>)
Signature:
```c++
void SetIndexedPropertyHandler(v8::Local<v8::ObjectTemplate> tpl,
Nan::IndexGetterCallback getter,
Nan::IndexSetterCallback setter = 0,
Nan::IndexQueryCallback query = 0,
Nan::IndexDeleterCallback deleter = 0,
Nan::IndexEnumeratorCallback enumerator = 0,
v8::Local<v8::Value> data = v8::Local<v8::Value>())
```
See the V8 [`ObjectTemplate#SetIndexedPropertyHandler()`](https://v8docs.nodesource.com/node-8.16/db/d5f/classv8_1_1_object_template.html#ac89f06d634add0e890452033f7d17ff1) for further information about how to use `Nan::SetIndexedPropertyHandler()`.
<a name="api_nan_set_template"></a>
### Nan::SetTemplate()
Adds properties on an `Object`'s or `Function`'s template.
Signature:
```c++
void Nan::SetTemplate(v8::Local<v8::Template> templ,
const char *name,
v8::Local<v8::Data> value);
void Nan::SetTemplate(v8::Local<v8::Template> templ,
v8::Local<v8::String> name,
v8::Local<v8::Data> value,
v8::PropertyAttribute attributes)
```
Calls the `Template`'s [`Set()`](https://v8docs.nodesource.com/node-8.16/db/df7/classv8_1_1_template.html#ae3fbaff137557aa6a0233bc7e52214ac).
<a name="api_nan_set_prototype_template"></a>
### Nan::SetPrototypeTemplate()
Adds properties on an `Object`'s or `Function`'s prototype template.
Signature:
```c++
void Nan::SetPrototypeTemplate(v8::Local<v8::FunctionTemplate> templ,
const char *name,
v8::Local<v8::Data> value);
void Nan::SetPrototypeTemplate(v8::Local<v8::FunctionTemplate> templ,
v8::Local<v8::String> name,
v8::Local<v8::Data> value,
v8::PropertyAttribute attributes)
```
Calls the `FunctionTemplate`'s _PrototypeTemplate's_ [`Set()`](https://v8docs.nodesource.com/node-8.16/db/df7/classv8_1_1_template.html#a2db6a56597bf23c59659c0659e564ddf).
<a name="api_nan_set_instance_template"></a>
### Nan::SetInstanceTemplate()
Use to add instance properties on `FunctionTemplate`'s.
Signature:
```c++
void Nan::SetInstanceTemplate(v8::Local<v8::FunctionTemplate> templ,
const char *name,
v8::Local<v8::Data> value);
void Nan::SetInstanceTemplate(v8::Local<v8::FunctionTemplate> templ,
v8::Local<v8::String> name,
v8::Local<v8::Data> value,
v8::PropertyAttribute attributes)
```
Calls the `FunctionTemplate`'s _InstanceTemplate's_ [`Set()`](https://v8docs.nodesource.com/node-8.16/db/df7/classv8_1_1_template.html#a2db6a56597bf23c59659c0659e564ddf).
<a name="api_nan_set_call_handler"></a>
### Nan::SetCallHandler()
Set the call-handler callback for a `v8::FunctionTemplate`.
This callback is called whenever the function created from this FunctionTemplate is called.
Signature:
```c++
void Nan::SetCallHandler(v8::Local<v8::FunctionTemplate> templ, Nan::FunctionCallback callback, v8::Local<v8::Value> data = v8::Local<v8::Value>())
```
Calls the `FunctionTemplate`'s [`SetCallHandler()`](https://v8docs.nodesource.com/node-8.16/d8/d83/classv8_1_1_function_template.html#ab7574b298db3c27fbc2ed465c08ea2f8).
<a name="api_nan_set_call_as_function_handler"></a>
### Nan::SetCallAsFunctionHandler()
Sets the callback to be used when calling instances created from the `v8::ObjectTemplate` as a function.
If no callback is set, instances behave like normal JavaScript objects that cannot be called as a function.
Signature:
```c++
void Nan::SetCallAsFunctionHandler(v8::Local<v8::ObjectTemplate> templ, Nan::FunctionCallback callback, v8::Local<v8::Value> data = v8::Local<v8::Value>())
```
Calls the `ObjectTemplate`'s [`SetCallAsFunctionHandler()`](https://v8docs.nodesource.com/node-8.16/db/d5f/classv8_1_1_object_template.html#a5e9612fc80bf6db8f2da199b9b0bd04e).

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## New
NAN provides a `Nan::New()` helper for the creation of new JavaScript objects in a way that's compatible across the supported versions of V8.
- <a href="#api_nan_new"><b><code>Nan::New()</code></b></a>
- <a href="#api_nan_undefined"><b><code>Nan::Undefined()</code></b></a>
- <a href="#api_nan_null"><b><code>Nan::Null()</code></b></a>
- <a href="#api_nan_true"><b><code>Nan::True()</code></b></a>
- <a href="#api_nan_false"><b><code>Nan::False()</code></b></a>
- <a href="#api_nan_empty_string"><b><code>Nan::EmptyString()</code></b></a>
<a name="api_nan_new"></a>
### Nan::New()
`Nan::New()` should be used to instantiate new JavaScript objects.
Refer to the specific V8 type in the [V8 documentation](https://v8docs.nodesource.com/node-8.16/d1/d83/classv8_1_1_data.html) for information on the types of arguments required for instantiation.
Signatures:
Return types are mostly omitted from the signatures for simplicity. In most cases the type will be contained within a `v8::Local<T>`. The following types will be contained within a `Nan::MaybeLocal<T>`: `v8::String`, `v8::Date`, `v8::RegExp`, `v8::Script`, `v8::UnboundScript`.
Empty objects:
```c++
Nan::New<T>();
```
Generic single and multiple-argument:
```c++
Nan::New<T>(A0 arg0);
Nan::New<T>(A0 arg0, A1 arg1);
Nan::New<T>(A0 arg0, A1 arg1, A2 arg2);
Nan::New<T>(A0 arg0, A1 arg1, A2 arg2, A3 arg3);
```
For creating `v8::FunctionTemplate` and `v8::Function` objects:
_The definition of `Nan::FunctionCallback` can be found in the [Method declaration](./methods.md#api_nan_method) documentation._
```c++
Nan::New<T>(Nan::FunctionCallback callback,
v8::Local<v8::Value> data = v8::Local<v8::Value>());
Nan::New<T>(Nan::FunctionCallback callback,
v8::Local<v8::Value> data = v8::Local<v8::Value>(),
A2 a2 = A2());
```
Native number types:
```c++
v8::Local<v8::Boolean> Nan::New<T>(bool value);
v8::Local<v8::Int32> Nan::New<T>(int32_t value);
v8::Local<v8::Uint32> Nan::New<T>(uint32_t value);
v8::Local<v8::Number> Nan::New<T>(double value);
```
String types:
```c++
Nan::MaybeLocal<v8::String> Nan::New<T>(std::string const& value);
Nan::MaybeLocal<v8::String> Nan::New<T>(const char * value, int length);
Nan::MaybeLocal<v8::String> Nan::New<T>(const char * value);
Nan::MaybeLocal<v8::String> Nan::New<T>(const uint16_t * value);
Nan::MaybeLocal<v8::String> Nan::New<T>(const uint16_t * value, int length);
```
Specialized types:
```c++
v8::Local<v8::String> Nan::New<T>(v8::String::ExternalStringResource * value);
v8::Local<v8::String> Nan::New<T>(Nan::ExternalOneByteStringResource * value);
v8::Local<v8::RegExp> Nan::New<T>(v8::Local<v8::String> pattern, v8::RegExp::Flags flags);
```
Note that `Nan::ExternalOneByteStringResource` maps to [`v8::String::ExternalOneByteStringResource`](https://v8docs.nodesource.com/node-8.16/d9/db3/classv8_1_1_string_1_1_external_one_byte_string_resource.html), and `v8::String::ExternalAsciiStringResource` in older versions of V8.
<a name="api_nan_undefined"></a>
### Nan::Undefined()
A helper method to reference the `v8::Undefined` object in a way that is compatible across all supported versions of V8.
Signature:
```c++
v8::Local<v8::Primitive> Nan::Undefined()
```
<a name="api_nan_null"></a>
### Nan::Null()
A helper method to reference the `v8::Null` object in a way that is compatible across all supported versions of V8.
Signature:
```c++
v8::Local<v8::Primitive> Nan::Null()
```
<a name="api_nan_true"></a>
### Nan::True()
A helper method to reference the `v8::Boolean` object representing the `true` value in a way that is compatible across all supported versions of V8.
Signature:
```c++
v8::Local<v8::Boolean> Nan::True()
```
<a name="api_nan_false"></a>
### Nan::False()
A helper method to reference the `v8::Boolean` object representing the `false` value in a way that is compatible across all supported versions of V8.
Signature:
```c++
v8::Local<v8::Boolean> Nan::False()
```
<a name="api_nan_empty_string"></a>
### Nan::EmptyString()
Call [`v8::String::Empty`](https://v8docs.nodesource.com/node-8.16/d2/db3/classv8_1_1_string.html#a7c1bc8886115d7ee46f1d571dd6ebc6d) to reference the empty string in a way that is compatible across all supported versions of V8.
Signature:
```c++
v8::Local<v8::String> Nan::EmptyString()
```
<a name="api_nan_new_one_byte_string"></a>
### Nan::NewOneByteString()
An implementation of [`v8::String::NewFromOneByte()`](https://v8docs.nodesource.com/node-8.16/d2/db3/classv8_1_1_string.html#a5264d50b96d2c896ce525a734dc10f09) provided for consistent availability and API across supported versions of V8. Allocates a new string from Latin-1 data.
Signature:
```c++
Nan::MaybeLocal<v8::String> Nan::NewOneByteString(const uint8_t * value,
int length = -1)
```

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## Miscellaneous Node Helpers
- <a href="#api_nan_asyncresource"><b><code>Nan::AsyncResource</code></b></a>
- <a href="#api_nan_make_callback"><b><code>Nan::MakeCallback()</code></b></a>
- <a href="#api_nan_module_init"><b><code>NAN_MODULE_INIT()</code></b></a>
- <a href="#api_nan_export"><b><code>Nan::Export()</code></b></a>
<a name="api_nan_asyncresource"></a>
### Nan::AsyncResource
This class is analogous to the `AsyncResource` JavaScript class exposed by Node's [async_hooks][] API.
When calling back into JavaScript asynchronously, special care must be taken to ensure that the runtime can properly track
async hops. `Nan::AsyncResource` is a class that provides an RAII wrapper around `node::EmitAsyncInit`, `node::EmitAsyncDestroy`,
and `node::MakeCallback`. Using this mechanism to call back into JavaScript, as opposed to `Nan::MakeCallback` or
`v8::Function::Call` ensures that the callback is executed in the correct async context. This ensures that async mechanisms
such as domains and [async_hooks][] function correctly.
Definition:
```c++
class AsyncResource {
public:
AsyncResource(v8::Local<v8::String> name,
v8::Local<v8::Object> resource = New<v8::Object>());
AsyncResource(const char* name,
v8::Local<v8::Object> resource = New<v8::Object>());
~AsyncResource();
v8::MaybeLocal<v8::Value> runInAsyncScope(v8::Local<v8::Object> target,
v8::Local<v8::Function> func,
int argc,
v8::Local<v8::Value>* argv);
v8::MaybeLocal<v8::Value> runInAsyncScope(v8::Local<v8::Object> target,
v8::Local<v8::String> symbol,
int argc,
v8::Local<v8::Value>* argv);
v8::MaybeLocal<v8::Value> runInAsyncScope(v8::Local<v8::Object> target,
const char* method,
int argc,
v8::Local<v8::Value>* argv);
};
```
* `name`: Identifier for the kind of resource that is being provided for diagnostics information exposed by the [async_hooks][]
API. This will be passed to the possible `init` hook as the `type`. To avoid name collisions with other modules we recommend
that the name include the name of the owning module as a prefix. For example `mysql` module could use something like
`mysql:batch-db-query-resource`.
* `resource`: An optional object associated with the async work that will be passed to the possible [async_hooks][]
`init` hook. If this parameter is omitted, or an empty handle is provided, this object will be created automatically.
* When calling JS on behalf of this resource, one can use `runInAsyncScope`. This will ensure that the callback runs in the
correct async execution context.
* `AsyncDestroy` is automatically called when an AsyncResource object is destroyed.
For more details, see the Node [async_hooks][] documentation. You might also want to take a look at the documentation for the
[N-API counterpart][napi]. For example usage, see the `asyncresource.cpp` example in the `test/cpp` directory.
<a name="api_nan_make_callback"></a>
### Nan::MakeCallback()
Deprecated wrappers around the legacy `node::MakeCallback()` APIs. Node.js 10+
has deprecated these legacy APIs as they do not provide a mechanism to preserve
async context.
We recommend that you use the `AsyncResource` class and `AsyncResource::runInAsyncScope` instead of using `Nan::MakeCallback` or
`v8::Function#Call()` directly. `AsyncResource` properly takes care of running the callback in the correct async execution
context something that is essential for functionality like domains, async_hooks and async debugging.
Signatures:
```c++
NAN_DEPRECATED
v8::Local<v8::Value> Nan::MakeCallback(v8::Local<v8::Object> target,
v8::Local<v8::Function> func,
int argc,
v8::Local<v8::Value>* argv);
NAN_DEPRECATED
v8::Local<v8::Value> Nan::MakeCallback(v8::Local<v8::Object> target,
v8::Local<v8::String> symbol,
int argc,
v8::Local<v8::Value>* argv);
NAN_DEPRECATED
v8::Local<v8::Value> Nan::MakeCallback(v8::Local<v8::Object> target,
const char* method,
int argc,
v8::Local<v8::Value>* argv);
```
<a name="api_nan_module_init"></a>
### NAN_MODULE_INIT()
Used to define the entry point function to a Node add-on. Creates a function with a given `name` that receives a `target` object representing the equivalent of the JavaScript `exports` object.
See example below.
<a name="api_nan_export"></a>
### Nan::Export()
A simple helper to register a `v8::FunctionTemplate` from a JavaScript-accessible method (see [Methods](./methods.md)) as a property on an object. Can be used in a way similar to assigning properties to `module.exports` in JavaScript.
Signature:
```c++
void Export(v8::Local<v8::Object> target, const char *name, Nan::FunctionCallback f)
```
Also available as the shortcut `NAN_EXPORT` macro.
Example:
```c++
NAN_METHOD(Foo) {
...
}
NAN_MODULE_INIT(Init) {
NAN_EXPORT(target, Foo);
}
```
[async_hooks]: https://nodejs.org/dist/latest-v9.x/docs/api/async_hooks.html
[napi]: https://nodejs.org/dist/latest-v9.x/docs/api/n-api.html#n_api_custom_asynchronous_operations

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## Object Wrappers
The `ObjectWrap` class can be used to make wrapped C++ objects and a factory of wrapped objects.
- <a href="#api_nan_object_wrap"><b><code>Nan::ObjectWrap</code></b></a>
<a name="api_nan_object_wrap"></a>
### Nan::ObjectWrap()
A reimplementation of `node::ObjectWrap` that adds some API not present in older versions of Node. Should be preferred over `node::ObjectWrap` in all cases for consistency.
Definition:
```c++
class ObjectWrap {
public:
ObjectWrap();
virtual ~ObjectWrap();
template <class T>
static inline T* Unwrap(v8::Local<v8::Object> handle);
inline v8::Local<v8::Object> handle();
inline Nan::Persistent<v8::Object>& persistent();
protected:
inline void Wrap(v8::Local<v8::Object> handle);
inline void MakeWeak();
/* Ref() marks the object as being attached to an event loop.
* Refed objects will not be garbage collected, even if
* all references are lost.
*/
virtual void Ref();
/* Unref() marks an object as detached from the event loop. This is its
* default state. When an object with a "weak" reference changes from
* attached to detached state it will be freed. Be careful not to access
* the object after making this call as it might be gone!
* (A "weak reference" means an object that only has a
* persistent handle.)
*
* DO NOT CALL THIS FROM DESTRUCTOR
*/
virtual void Unref();
int refs_; // ro
};
```
See the Node documentation on [Wrapping C++ Objects](https://nodejs.org/api/addons.html#addons_wrapping_c_objects) for more details.
### This vs. Holder
When calling `Unwrap`, it is important that the argument is indeed some JavaScript object which got wrapped by a `Wrap` call for this class or any derived class.
The `Signature` installed by [`Nan::SetPrototypeMethod()`](methods.md#api_nan_set_prototype_method) does ensure that `info.Holder()` is just such an instance.
In Node 0.12 and later, `info.This()` will also be of such a type, since otherwise the invocation will get rejected.
However, in Node 0.10 and before it was possible to invoke a method on a JavaScript object which just had the extension type in its prototype chain.
In such a situation, calling `Unwrap` on `info.This()` will likely lead to a failed assertion causing a crash, but could lead to even more serious corruption.
On the other hand, calling `Unwrap` in an [accessor](methods.md#api_nan_set_accessor) should not use `Holder()` if the accessor is defined on the prototype.
So either define your accessors on the instance template,
or use `This()` after verifying that it is indeed a valid object.
### Examples
#### Basic
```c++
class MyObject : public Nan::ObjectWrap {
public:
static NAN_MODULE_INIT(Init) {
v8::Local<v8::FunctionTemplate> tpl = Nan::New<v8::FunctionTemplate>(New);
tpl->SetClassName(Nan::New("MyObject").ToLocalChecked());
tpl->InstanceTemplate()->SetInternalFieldCount(1);
Nan::SetPrototypeMethod(tpl, "getHandle", GetHandle);
Nan::SetPrototypeMethod(tpl, "getValue", GetValue);
constructor().Reset(Nan::GetFunction(tpl).ToLocalChecked());
Nan::Set(target, Nan::New("MyObject").ToLocalChecked(),
Nan::GetFunction(tpl).ToLocalChecked());
}
private:
explicit MyObject(double value = 0) : value_(value) {}
~MyObject() {}
static NAN_METHOD(New) {
if (info.IsConstructCall()) {
double value = info[0]->IsUndefined() ? 0 : Nan::To<double>(info[0]).FromJust();
MyObject *obj = new MyObject(value);
obj->Wrap(info.This());
info.GetReturnValue().Set(info.This());
} else {
const int argc = 1;
v8::Local<v8::Value> argv[argc] = {info[0]};
v8::Local<v8::Function> cons = Nan::New(constructor());
info.GetReturnValue().Set(Nan::NewInstance(cons, argc, argv).ToLocalChecked());
}
}
static NAN_METHOD(GetHandle) {
MyObject* obj = Nan::ObjectWrap::Unwrap<MyObject>(info.Holder());
info.GetReturnValue().Set(obj->handle());
}
static NAN_METHOD(GetValue) {
MyObject* obj = Nan::ObjectWrap::Unwrap<MyObject>(info.Holder());
info.GetReturnValue().Set(obj->value_);
}
static inline Nan::Persistent<v8::Function> & constructor() {
static Nan::Persistent<v8::Function> my_constructor;
return my_constructor;
}
double value_;
};
NODE_MODULE(objectwrapper, MyObject::Init)
```
To use in Javascript:
```Javascript
var objectwrapper = require('bindings')('objectwrapper');
var obj = new objectwrapper.MyObject(5);
console.log('Should be 5: ' + obj.getValue());
```
#### Factory of wrapped objects
```c++
class MyFactoryObject : public Nan::ObjectWrap {
public:
static NAN_MODULE_INIT(Init) {
v8::Local<v8::FunctionTemplate> tpl = Nan::New<v8::FunctionTemplate>(New);
tpl->InstanceTemplate()->SetInternalFieldCount(1);
Nan::SetPrototypeMethod(tpl, "getValue", GetValue);
constructor().Reset(Nan::GetFunction(tpl).ToLocalChecked());
}
static NAN_METHOD(NewInstance) {
v8::Local<v8::Function> cons = Nan::New(constructor());
double value = info[0]->IsNumber() ? Nan::To<double>(info[0]).FromJust() : 0;
const int argc = 1;
v8::Local<v8::Value> argv[1] = {Nan::New(value)};
info.GetReturnValue().Set(Nan::NewInstance(cons, argc, argv).ToLocalChecked());
}
// Needed for the next example:
inline double value() const {
return value_;
}
private:
explicit MyFactoryObject(double value = 0) : value_(value) {}
~MyFactoryObject() {}
static NAN_METHOD(New) {
if (info.IsConstructCall()) {
double value = info[0]->IsNumber() ? Nan::To<double>(info[0]).FromJust() : 0;
MyFactoryObject * obj = new MyFactoryObject(value);
obj->Wrap(info.This());
info.GetReturnValue().Set(info.This());
} else {
const int argc = 1;
v8::Local<v8::Value> argv[argc] = {info[0]};
v8::Local<v8::Function> cons = Nan::New(constructor());
info.GetReturnValue().Set(Nan::NewInstance(cons, argc, argv).ToLocalChecked());
}
}
static NAN_METHOD(GetValue) {
MyFactoryObject* obj = ObjectWrap::Unwrap<MyFactoryObject>(info.Holder());
info.GetReturnValue().Set(obj->value_);
}
static inline Nan::Persistent<v8::Function> & constructor() {
static Nan::Persistent<v8::Function> my_constructor;
return my_constructor;
}
double value_;
};
NAN_MODULE_INIT(Init) {
MyFactoryObject::Init(target);
Nan::Set(target,
Nan::New<v8::String>("newFactoryObjectInstance").ToLocalChecked(),
Nan::GetFunction(
Nan::New<v8::FunctionTemplate>(MyFactoryObject::NewInstance)).ToLocalChecked()
);
}
NODE_MODULE(wrappedobjectfactory, Init)
```
To use in Javascript:
```Javascript
var wrappedobjectfactory = require('bindings')('wrappedobjectfactory');
var obj = wrappedobjectfactory.newFactoryObjectInstance(10);
console.log('Should be 10: ' + obj.getValue());
```
#### Passing wrapped objects around
Use the `MyFactoryObject` class above along with the following:
```c++
static NAN_METHOD(Sum) {
Nan::MaybeLocal<v8::Object> maybe1 = Nan::To<v8::Object>(info[0]);
Nan::MaybeLocal<v8::Object> maybe2 = Nan::To<v8::Object>(info[1]);
// Quick check:
if (maybe1.IsEmpty() || maybe2.IsEmpty()) {
// return value is undefined by default
return;
}
MyFactoryObject* obj1 =
Nan::ObjectWrap::Unwrap<MyFactoryObject>(maybe1.ToLocalChecked());
MyFactoryObject* obj2 =
Nan::ObjectWrap::Unwrap<MyFactoryObject>(maybe2.ToLocalChecked());
info.GetReturnValue().Set(Nan::New<v8::Number>(obj1->value() + obj2->value()));
}
NAN_MODULE_INIT(Init) {
MyFactoryObject::Init(target);
Nan::Set(target,
Nan::New<v8::String>("newFactoryObjectInstance").ToLocalChecked(),
Nan::GetFunction(
Nan::New<v8::FunctionTemplate>(MyFactoryObject::NewInstance)).ToLocalChecked()
);
Nan::Set(target,
Nan::New<v8::String>("sum").ToLocalChecked(),
Nan::GetFunction(Nan::New<v8::FunctionTemplate>(Sum)).ToLocalChecked()
);
}
NODE_MODULE(myaddon, Init)
```
To use in Javascript:
```Javascript
var myaddon = require('bindings')('myaddon');
var obj1 = myaddon.newFactoryObjectInstance(5);
var obj2 = myaddon.newFactoryObjectInstance(10);
console.log('sum of object values: ' + myaddon.sum(obj1, obj2));
```

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## Persistent references
An object reference that is independent of any `HandleScope` is a _persistent_ reference. Where a `Local` handle only lives as long as the `HandleScope` in which it was allocated, a `Persistent` handle remains valid until it is explicitly disposed.
Due to the evolution of the V8 API, it is necessary for NAN to provide a wrapper implementation of the `Persistent` classes to supply compatibility across the V8 versions supported.
- <a href="#api_nan_persistent_base"><b><code>Nan::PersistentBase & v8::PersistentBase</code></b></a>
- <a href="#api_nan_non_copyable_persistent_traits"><b><code>Nan::NonCopyablePersistentTraits & v8::NonCopyablePersistentTraits</code></b></a>
- <a href="#api_nan_copyable_persistent_traits"><b><code>Nan::CopyablePersistentTraits & v8::CopyablePersistentTraits</code></b></a>
- <a href="#api_nan_persistent"><b><code>Nan::Persistent</code></b></a>
- <a href="#api_nan_global"><b><code>Nan::Global</code></b></a>
- <a href="#api_nan_weak_callback_info"><b><code>Nan::WeakCallbackInfo</code></b></a>
- <a href="#api_nan_weak_callback_type"><b><code>Nan::WeakCallbackType</code></b></a>
Also see the V8 Embedders Guide section on [Handles and Garbage Collection](https://developers.google.com/v8/embed#handles).
<a name="api_nan_persistent_base"></a>
### Nan::PersistentBase & v8::PersistentBase
A persistent handle contains a reference to a storage cell in V8 which holds an object value and which is updated by the garbage collector whenever the object is moved. A new storage cell can be created using the constructor or `Nan::PersistentBase::Reset()`. Existing handles can be disposed using an argument-less `Nan::PersistentBase::Reset()`.
Definition:
_(note: this is implemented as `Nan::PersistentBase` for older versions of V8 and the native `v8::PersistentBase` is used for newer versions of V8)_
```c++
template<typename T> class PersistentBase {
public:
/**
* If non-empty, destroy the underlying storage cell
*/
void Reset();
/**
* If non-empty, destroy the underlying storage cell and create a new one with
* the contents of another if it is also non-empty
*/
template<typename S> void Reset(const v8::Local<S> &other);
/**
* If non-empty, destroy the underlying storage cell and create a new one with
* the contents of another if it is also non-empty
*/
template<typename S> void Reset(const PersistentBase<S> &other);
/** Returns true if the handle is empty. */
bool IsEmpty() const;
/**
* If non-empty, destroy the underlying storage cell
* IsEmpty() will return true after this call.
*/
void Empty();
template<typename S> bool operator==(const PersistentBase<S> &that);
template<typename S> bool operator==(const v8::Local<S> &that);
template<typename S> bool operator!=(const PersistentBase<S> &that);
template<typename S> bool operator!=(const v8::Local<S> &that);
/**
* Install a finalization callback on this object.
* NOTE: There is no guarantee as to *when* or even *if* the callback is
* invoked. The invocation is performed solely on a best effort basis.
* As always, GC-based finalization should *not* be relied upon for any
* critical form of resource management! At the moment you can either
* specify a parameter for the callback or the location of two internal
* fields in the dying object.
*/
template<typename P>
void SetWeak(P *parameter,
typename WeakCallbackInfo<P>::Callback callback,
WeakCallbackType type);
void ClearWeak();
/**
* Marks the reference to this object independent. Garbage collector is free
* to ignore any object groups containing this object. Weak callback for an
* independent handle should not assume that it will be preceded by a global
* GC prologue callback or followed by a global GC epilogue callback.
*/
void MarkIndependent() const;
bool IsIndependent() const;
/** Checks if the handle holds the only reference to an object. */
bool IsNearDeath() const;
/** Returns true if the handle's reference is weak. */
bool IsWeak() const
};
```
See the V8 documentation for [`PersistentBase`](https://v8docs.nodesource.com/node-8.16/d4/dca/classv8_1_1_persistent_base.html) for further information.
**Tip:** To get a `v8::Local` reference to the original object back from a `PersistentBase` or `Persistent` object:
```c++
v8::Local<v8::Object> object = Nan::New(persistent);
```
<a name="api_nan_non_copyable_persistent_traits"></a>
### Nan::NonCopyablePersistentTraits & v8::NonCopyablePersistentTraits
Default traits for `Nan::Persistent`. This class does not allow use of the a copy constructor or assignment operator. At present `kResetInDestructor` is not set, but that will change in a future version.
Definition:
_(note: this is implemented as `Nan::NonCopyablePersistentTraits` for older versions of V8 and the native `v8::NonCopyablePersistentTraits` is used for newer versions of V8)_
```c++
template<typename T> class NonCopyablePersistentTraits {
public:
typedef Persistent<T, NonCopyablePersistentTraits<T> > NonCopyablePersistent;
static const bool kResetInDestructor = false;
template<typename S, typename M>
static void Copy(const Persistent<S, M> &source,
NonCopyablePersistent *dest);
template<typename O> static void Uncompilable();
};
```
See the V8 documentation for [`NonCopyablePersistentTraits`](https://v8docs.nodesource.com/node-8.16/de/d73/classv8_1_1_non_copyable_persistent_traits.html) for further information.
<a name="api_nan_copyable_persistent_traits"></a>
### Nan::CopyablePersistentTraits & v8::CopyablePersistentTraits
A helper class of traits to allow copying and assignment of `Persistent`. This will clone the contents of storage cell, but not any of the flags, etc..
Definition:
_(note: this is implemented as `Nan::CopyablePersistentTraits` for older versions of V8 and the native `v8::NonCopyablePersistentTraits` is used for newer versions of V8)_
```c++
template<typename T>
class CopyablePersistentTraits {
public:
typedef Persistent<T, CopyablePersistentTraits<T> > CopyablePersistent;
static const bool kResetInDestructor = true;
template<typename S, typename M>
static void Copy(const Persistent<S, M> &source,
CopyablePersistent *dest);
};
```
See the V8 documentation for [`CopyablePersistentTraits`](https://v8docs.nodesource.com/node-8.16/da/d5c/structv8_1_1_copyable_persistent_traits.html) for further information.
<a name="api_nan_persistent"></a>
### Nan::Persistent
A type of `PersistentBase` which allows copy and assignment. Copy, assignment and destructor behavior is controlled by the traits class `M`.
Definition:
```c++
template<typename T, typename M = NonCopyablePersistentTraits<T> >
class Persistent;
template<typename T, typename M> class Persistent : public PersistentBase<T> {
public:
/**
* A Persistent with no storage cell.
*/
Persistent();
/**
* Construct a Persistent from a v8::Local. When the v8::Local is non-empty, a
* new storage cell is created pointing to the same object, and no flags are
* set.
*/
template<typename S> Persistent(v8::Local<S> that);
/**
* Construct a Persistent from a Persistent. When the Persistent is non-empty,
* a new storage cell is created pointing to the same object, and no flags are
* set.
*/
Persistent(const Persistent &that);
/**
* The copy constructors and assignment operator create a Persistent exactly
* as the Persistent constructor, but the Copy function from the traits class
* is called, allowing the setting of flags based on the copied Persistent.
*/
Persistent &operator=(const Persistent &that);
template <typename S, typename M2>
Persistent &operator=(const Persistent<S, M2> &that);
/**
* The destructor will dispose the Persistent based on the kResetInDestructor
* flags in the traits class. Since not calling dispose can result in a
* memory leak, it is recommended to always set this flag.
*/
~Persistent();
};
```
See the V8 documentation for [`Persistent`](https://v8docs.nodesource.com/node-8.16/d2/d78/classv8_1_1_persistent.html) for further information.
<a name="api_nan_global"></a>
### Nan::Global
A type of `PersistentBase` which has move semantics.
```c++
template<typename T> class Global : public PersistentBase<T> {
public:
/**
* A Global with no storage cell.
*/
Global();
/**
* Construct a Global from a v8::Local. When the v8::Local is non-empty, a new
* storage cell is created pointing to the same object, and no flags are set.
*/
template<typename S> Global(v8::Local<S> that);
/**
* Construct a Global from a PersistentBase. When the Persistent is non-empty,
* a new storage cell is created pointing to the same object, and no flags are
* set.
*/
template<typename S> Global(const PersistentBase<S> &that);
/**
* Pass allows returning globals from functions, etc.
*/
Global Pass();
};
```
See the V8 documentation for [`Global`](https://v8docs.nodesource.com/node-8.16/d5/d40/classv8_1_1_global.html) for further information.
<a name="api_nan_weak_callback_info"></a>
### Nan::WeakCallbackInfo
`Nan::WeakCallbackInfo` is used as an argument when setting a persistent reference as weak. You may need to free any external resources attached to the object. It is a mirror of `v8:WeakCallbackInfo` as found in newer versions of V8.
Definition:
```c++
template<typename T> class WeakCallbackInfo {
public:
typedef void (*Callback)(const WeakCallbackInfo<T>& data);
v8::Isolate *GetIsolate() const;
/**
* Get the parameter that was associated with the weak handle.
*/
T *GetParameter() const;
/**
* Get pointer from internal field, index can be 0 or 1.
*/
void *GetInternalField(int index) const;
};
```
Example usage:
```c++
void weakCallback(const WeakCallbackInfo<int> &data) {
int *parameter = data.GetParameter();
delete parameter;
}
Persistent<v8::Object> obj;
int *data = new int(0);
obj.SetWeak(data, callback, WeakCallbackType::kParameter);
```
See the V8 documentation for [`WeakCallbackInfo`](https://v8docs.nodesource.com/node-8.16/d8/d06/classv8_1_1_weak_callback_info.html) for further information.
<a name="api_nan_weak_callback_type"></a>
### Nan::WeakCallbackType
Represents the type of a weak callback.
A weak callback of type `kParameter` makes the supplied parameter to `Nan::PersistentBase::SetWeak` available through `WeakCallbackInfo::GetParameter`.
A weak callback of type `kInternalFields` uses up to two internal fields at indices 0 and 1 on the `Nan::PersistentBase<v8::Object>` being made weak.
Note that only `v8::Object`s and derivatives can have internal fields.
Definition:
```c++
enum class WeakCallbackType { kParameter, kInternalFields };
```

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## Scopes
A _local handle_ is a pointer to an object. All V8 objects are accessed using handles, they are necessary because of the way the V8 garbage collector works.
A handle scope can be thought of as a container for any number of handles. When you've finished with your handles, instead of deleting each one individually you can simply delete their scope.
The creation of `HandleScope` objects is different across the supported versions of V8. Therefore, NAN provides its own implementations that can be used safely across these.
- <a href="#api_nan_handle_scope"><b><code>Nan::HandleScope</code></b></a>
- <a href="#api_nan_escapable_handle_scope"><b><code>Nan::EscapableHandleScope</code></b></a>
Also see the V8 Embedders Guide section on [Handles and Garbage Collection](https://github.com/v8/v8/wiki/Embedder%27s%20Guide#handles-and-garbage-collection).
<a name="api_nan_handle_scope"></a>
### Nan::HandleScope
A simple wrapper around [`v8::HandleScope`](https://v8docs.nodesource.com/node-8.16/d3/d95/classv8_1_1_handle_scope.html).
Definition:
```c++
class Nan::HandleScope {
public:
Nan::HandleScope();
static int NumberOfHandles();
};
```
Allocate a new `Nan::HandleScope` whenever you are creating new V8 JavaScript objects. Note that an implicit `HandleScope` is created for you on JavaScript-accessible methods so you do not need to insert one yourself.
Example:
```c++
// new object is created, it needs a new scope:
void Pointless() {
Nan::HandleScope scope;
v8::Local<v8::Object> obj = Nan::New<v8::Object>();
}
// JavaScript-accessible method already has a HandleScope
NAN_METHOD(Pointless2) {
v8::Local<v8::Object> obj = Nan::New<v8::Object>();
}
```
<a name="api_nan_escapable_handle_scope"></a>
### Nan::EscapableHandleScope
Similar to [`Nan::HandleScope`](#api_nan_handle_scope) but should be used in cases where a function needs to return a V8 JavaScript type that has been created within it.
Definition:
```c++
class Nan::EscapableHandleScope {
public:
Nan::EscapableHandleScope();
static int NumberOfHandles();
template<typename T> v8::Local<T> Escape(v8::Local<T> value);
}
```
Use `Escape(value)` to return the object.
Example:
```c++
v8::Local<v8::Object> EmptyObj() {
Nan::EscapableHandleScope scope;
v8::Local<v8::Object> obj = Nan::New<v8::Object>();
return scope.Escape(obj);
}
```

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## Script
NAN provides `v8::Script` helpers as the API has changed over the supported versions of V8.
- <a href="#api_nan_compile_script"><b><code>Nan::CompileScript()</code></b></a>
- <a href="#api_nan_run_script"><b><code>Nan::RunScript()</code></b></a>
- <a href="#api_nan_script_origin"><b><code>Nan::ScriptOrigin</code></b></a>
<a name="api_nan_compile_script"></a>
### Nan::CompileScript()
A wrapper around [`v8::ScriptCompiler::Compile()`](https://v8docs.nodesource.com/node-8.16/da/da5/classv8_1_1_script_compiler.html#a93f5072a0db55d881b969e9fc98e564b).
Note that `Nan::BoundScript` is an alias for `v8::Script`.
Signature:
```c++
Nan::MaybeLocal<Nan::BoundScript> Nan::CompileScript(
v8::Local<v8::String> s,
const v8::ScriptOrigin& origin);
Nan::MaybeLocal<Nan::BoundScript> Nan::CompileScript(v8::Local<v8::String> s);
```
<a name="api_nan_run_script"></a>
### Nan::RunScript()
Calls `script->Run()` or `script->BindToCurrentContext()->Run(Nan::GetCurrentContext())`.
Note that `Nan::BoundScript` is an alias for `v8::Script` and `Nan::UnboundScript` is an alias for `v8::UnboundScript` where available and `v8::Script` on older versions of V8.
Signature:
```c++
Nan::MaybeLocal<v8::Value> Nan::RunScript(v8::Local<Nan::UnboundScript> script)
Nan::MaybeLocal<v8::Value> Nan::RunScript(v8::Local<Nan::BoundScript> script)
```
<a name="api_nan_script_origin"></a>
### Nan::ScriptOrigin
A class transparently extending [`v8::ScriptOrigin`](https://v8docs.nodesource.com/node-16.0/db/d84/classv8_1_1_script_origin.html#pub-methods)
to provide backwards compatibility. Only the listed methods are guaranteed to
be available on all versions of Node.
Declaration:
```c++
class Nan::ScriptOrigin : public v8::ScriptOrigin {
public:
ScriptOrigin(v8::Local<v8::Value> name, v8::Local<v8::Integer> line = v8::Local<v8::Integer>(), v8::Local<v8::Integer> column = v8::Local<v8::Integer>())
v8::Local<v8::Value> ResourceName() const;
v8::Local<v8::Integer> ResourceLineOffset() const;
v8::Local<v8::Integer> ResourceColumnOffset() const;
}
```

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## Strings & Bytes
Miscellaneous string & byte encoding and decoding functionality provided for compatibility across supported versions of V8 and Node. Implemented by NAN to ensure that all encoding types are supported, even for older versions of Node where they are missing.
- <a href="#api_nan_encoding"><b><code>Nan::Encoding</code></b></a>
- <a href="#api_nan_encode"><b><code>Nan::Encode()</code></b></a>
- <a href="#api_nan_decode_bytes"><b><code>Nan::DecodeBytes()</code></b></a>
- <a href="#api_nan_decode_write"><b><code>Nan::DecodeWrite()</code></b></a>
<a name="api_nan_encoding"></a>
### Nan::Encoding
An enum representing the supported encoding types. A copy of `node::encoding` that is consistent across versions of Node.
Definition:
```c++
enum Nan::Encoding { ASCII, UTF8, BASE64, UCS2, BINARY, HEX, BUFFER }
```
<a name="api_nan_encode"></a>
### Nan::Encode()
A wrapper around `node::Encode()` that provides a consistent implementation across supported versions of Node.
Signature:
```c++
v8::Local<v8::Value> Nan::Encode(const void *buf,
size_t len,
enum Nan::Encoding encoding = BINARY);
```
<a name="api_nan_decode_bytes"></a>
### Nan::DecodeBytes()
A wrapper around `node::DecodeBytes()` that provides a consistent implementation across supported versions of Node.
Signature:
```c++
ssize_t Nan::DecodeBytes(v8::Local<v8::Value> val,
enum Nan::Encoding encoding = BINARY);
```
<a name="api_nan_decode_write"></a>
### Nan::DecodeWrite()
A wrapper around `node::DecodeWrite()` that provides a consistent implementation across supported versions of Node.
Signature:
```c++
ssize_t Nan::DecodeWrite(char *buf,
size_t len,
v8::Local<v8::Value> val,
enum Nan::Encoding encoding = BINARY);
```

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## V8 internals
The hooks to access V8 internals—including GC and statistics—are different across the supported versions of V8, therefore NAN provides its own hooks that call the appropriate V8 methods.
- <a href="#api_nan_gc_callback"><b><code>NAN_GC_CALLBACK()</code></b></a>
- <a href="#api_nan_add_gc_epilogue_callback"><b><code>Nan::AddGCEpilogueCallback()</code></b></a>
- <a href="#api_nan_remove_gc_epilogue_callback"><b><code>Nan::RemoveGCEpilogueCallback()</code></b></a>
- <a href="#api_nan_add_gc_prologue_callback"><b><code>Nan::AddGCPrologueCallback()</code></b></a>
- <a href="#api_nan_remove_gc_prologue_callback"><b><code>Nan::RemoveGCPrologueCallback()</code></b></a>
- <a href="#api_nan_get_heap_statistics"><b><code>Nan::GetHeapStatistics()</code></b></a>
- <a href="#api_nan_set_counter_function"><b><code>Nan::SetCounterFunction()</code></b></a>
- <a href="#api_nan_set_create_histogram_function"><b><code>Nan::SetCreateHistogramFunction()</code></b></a>
- <a href="#api_nan_set_add_histogram_sample_function"><b><code>Nan::SetAddHistogramSampleFunction()</code></b></a>
- <a href="#api_nan_idle_notification"><b><code>Nan::IdleNotification()</code></b></a>
- <a href="#api_nan_low_memory_notification"><b><code>Nan::LowMemoryNotification()</code></b></a>
- <a href="#api_nan_context_disposed_notification"><b><code>Nan::ContextDisposedNotification()</code></b></a>
- <a href="#api_nan_get_internal_field_pointer"><b><code>Nan::GetInternalFieldPointer()</code></b></a>
- <a href="#api_nan_set_internal_field_pointer"><b><code>Nan::SetInternalFieldPointer()</code></b></a>
- <a href="#api_nan_adjust_external_memory"><b><code>Nan::AdjustExternalMemory()</code></b></a>
<a name="api_nan_gc_callback"></a>
### NAN_GC_CALLBACK(callbackname)
Use `NAN_GC_CALLBACK` to declare your callbacks for `Nan::AddGCPrologueCallback()` and `Nan::AddGCEpilogueCallback()`. Your new method receives the arguments `v8::GCType type` and `v8::GCCallbackFlags flags`.
```c++
static Nan::Persistent<Function> callback;
NAN_GC_CALLBACK(gcPrologueCallback) {
v8::Local<Value> argv[] = { Nan::New("prologue").ToLocalChecked() };
Nan::MakeCallback(Nan::GetCurrentContext()->Global(), Nan::New(callback), 1, argv);
}
NAN_METHOD(Hook) {
callback.Reset(To<Function>(args[0]).ToLocalChecked());
Nan::AddGCPrologueCallback(gcPrologueCallback);
info.GetReturnValue().Set(info.Holder());
}
```
<a name="api_nan_add_gc_epilogue_callback"></a>
### Nan::AddGCEpilogueCallback()
Signature:
```c++
void Nan::AddGCEpilogueCallback(v8::Isolate::GCEpilogueCallback callback, v8::GCType gc_type_filter = v8::kGCTypeAll)
```
Calls V8's [`AddGCEpilogueCallback()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a580f976e4290cead62c2fc4dd396be3e).
<a name="api_nan_remove_gc_epilogue_callback"></a>
### Nan::RemoveGCEpilogueCallback()
Signature:
```c++
void Nan::RemoveGCEpilogueCallback(v8::Isolate::GCEpilogueCallback callback)
```
Calls V8's [`RemoveGCEpilogueCallback()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#adca9294555a3908e9f23c7bb0f0f284c).
<a name="api_nan_add_gc_prologue_callback"></a>
### Nan::AddGCPrologueCallback()
Signature:
```c++
void Nan::AddGCPrologueCallback(v8::Isolate::GCPrologueCallback, v8::GCType gc_type_filter callback)
```
Calls V8's [`AddGCPrologueCallback()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a6dbef303603ebdb03da6998794ea05b8).
<a name="api_nan_remove_gc_prologue_callback"></a>
### Nan::RemoveGCPrologueCallback()
Signature:
```c++
void Nan::RemoveGCPrologueCallback(v8::Isolate::GCPrologueCallback callback)
```
Calls V8's [`RemoveGCPrologueCallback()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a5f72c7cda21415ce062bbe5c58abe09e).
<a name="api_nan_get_heap_statistics"></a>
### Nan::GetHeapStatistics()
Signature:
```c++
void Nan::GetHeapStatistics(v8::HeapStatistics *heap_statistics)
```
Calls V8's [`GetHeapStatistics()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a5593ac74687b713095c38987e5950b34).
<a name="api_nan_set_counter_function"></a>
### Nan::SetCounterFunction()
Signature:
```c++
void Nan::SetCounterFunction(v8::CounterLookupCallback cb)
```
Calls V8's [`SetCounterFunction()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a045d7754e62fa0ec72ae6c259b29af94).
<a name="api_nan_set_create_histogram_function"></a>
### Nan::SetCreateHistogramFunction()
Signature:
```c++
void Nan::SetCreateHistogramFunction(v8::CreateHistogramCallback cb)
```
Calls V8's [`SetCreateHistogramFunction()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a542d67e85089cb3f92aadf032f99e732).
<a name="api_nan_set_add_histogram_sample_function"></a>
### Nan::SetAddHistogramSampleFunction()
Signature:
```c++
void Nan::SetAddHistogramSampleFunction(v8::AddHistogramSampleCallback cb)
```
Calls V8's [`SetAddHistogramSampleFunction()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#aeb420b690bc2c216882d6fdd00ddd3ea).
<a name="api_nan_idle_notification"></a>
### Nan::IdleNotification()
Signature:
```c++
bool Nan::IdleNotification(int idle_time_in_ms)
```
Calls V8's [`IdleNotification()` or `IdleNotificationDeadline()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#ad6a2a02657f5425ad460060652a5a118) depending on V8 version.
<a name="api_nan_low_memory_notification"></a>
### Nan::LowMemoryNotification()
Signature:
```c++
void Nan::LowMemoryNotification()
```
Calls V8's [`LowMemoryNotification()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a24647f61d6b41f69668094bdcd6ea91f).
<a name="api_nan_context_disposed_notification"></a>
### Nan::ContextDisposedNotification()
Signature:
```c++
void Nan::ContextDisposedNotification()
```
Calls V8's [`ContextDisposedNotification()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#ad7f5dc559866343fe6cd8db1f134d48b).
<a name="api_nan_get_internal_field_pointer"></a>
### Nan::GetInternalFieldPointer()
Gets a pointer to the internal field with at `index` from a V8 `Object` handle.
Signature:
```c++
void* Nan::GetInternalFieldPointer(v8::Local<v8::Object> object, int index)
```
Calls the Object's [`GetAlignedPointerFromInternalField()` or `GetPointerFromInternalField()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#a580ea84afb26c005d6762eeb9e3c308f) depending on the version of V8.
<a name="api_nan_set_internal_field_pointer"></a>
### Nan::SetInternalFieldPointer()
Sets the value of the internal field at `index` on a V8 `Object` handle.
Signature:
```c++
void Nan::SetInternalFieldPointer(v8::Local<v8::Object> object, int index, void* value)
```
Calls the Object's [`SetAlignedPointerInInternalField()` or `SetPointerInInternalField()`](https://v8docs.nodesource.com/node-8.16/db/d85/classv8_1_1_object.html#ab3c57184263cf29963ef0017bec82281) depending on the version of V8.
<a name="api_nan_adjust_external_memory"></a>
### Nan::AdjustExternalMemory()
Signature:
```c++
int Nan::AdjustExternalMemory(int bytesChange)
```
Calls V8's [`AdjustAmountOfExternalAllocatedMemory()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#ae1a59cac60409d3922582c4af675473e).

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## Miscellaneous V8 Helpers
- <a href="#api_nan_utf8_string"><b><code>Nan::Utf8String</code></b></a>
- <a href="#api_nan_get_current_context"><b><code>Nan::GetCurrentContext()</code></b></a>
- <a href="#api_nan_set_isolate_data"><b><code>Nan::SetIsolateData()</code></b></a>
- <a href="#api_nan_get_isolate_data"><b><code>Nan::GetIsolateData()</code></b></a>
- <a href="#api_nan_typedarray_contents"><b><code>Nan::TypedArrayContents</code></b></a>
<a name="api_nan_utf8_string"></a>
### Nan::Utf8String
Converts an object to a UTF-8-encoded character array. If conversion to a string fails (e.g. due to an exception in the toString() method of the object) then the length() method returns 0 and the * operator returns NULL. The underlying memory used for this object is managed by the object.
An implementation of [`v8::String::Utf8Value`](https://v8docs.nodesource.com/node-8.16/d4/d1b/classv8_1_1_string_1_1_utf8_value.html) that is consistent across all supported versions of V8.
Definition:
```c++
class Nan::Utf8String {
public:
Nan::Utf8String(v8::Local<v8::Value> from);
int length() const;
char* operator*();
const char* operator*() const;
};
```
<a name="api_nan_get_current_context"></a>
### Nan::GetCurrentContext()
A call to [`v8::Isolate::GetCurrent()->GetCurrentContext()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a81c7a1ed7001ae2a65e89107f75fd053) that works across all supported versions of V8.
Signature:
```c++
v8::Local<v8::Context> Nan::GetCurrentContext()
```
<a name="api_nan_set_isolate_data"></a>
### Nan::SetIsolateData()
A helper to provide a consistent API to [`v8::Isolate#SetData()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#a7acadfe7965997e9c386a05f098fbe36).
Signature:
```c++
void Nan::SetIsolateData(v8::Isolate *isolate, T *data)
```
<a name="api_nan_get_isolate_data"></a>
### Nan::GetIsolateData()
A helper to provide a consistent API to [`v8::Isolate#GetData()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#aabd223436bc1100a787dadaa024c6257).
Signature:
```c++
T *Nan::GetIsolateData(v8::Isolate *isolate)
```
<a name="api_nan_typedarray_contents"></a>
### Nan::TypedArrayContents<T>
A helper class for accessing the contents of an ArrayBufferView (aka a typedarray) from C++. If the input array is not a valid typedarray, then the data pointer of TypedArrayContents will default to `NULL` and the length will be 0. If the data pointer is not compatible with the alignment requirements of type, an assertion error will fail.
Note that you must store a reference to the `array` object while you are accessing its contents.
Definition:
```c++
template<typename T>
class Nan::TypedArrayContents {
public:
TypedArrayContents(v8::Local<Value> array);
size_t length() const;
T* const operator*();
const T* const operator*() const;
};
```

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console.log(require('path').relative('.', __dirname));

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_CALLBACKS_H_
#define NAN_CALLBACKS_H_
template<typename T> class FunctionCallbackInfo;
template<typename T> class PropertyCallbackInfo;
template<typename T> class Global;
typedef void(*FunctionCallback)(const FunctionCallbackInfo<v8::Value>&);
typedef void(*GetterCallback)
(v8::Local<v8::String>, const PropertyCallbackInfo<v8::Value>&);
typedef void(*SetterCallback)(
v8::Local<v8::String>,
v8::Local<v8::Value>,
const PropertyCallbackInfo<void>&);
typedef void(*PropertyGetterCallback)(
v8::Local<v8::String>,
const PropertyCallbackInfo<v8::Value>&);
typedef void(*PropertySetterCallback)(
v8::Local<v8::String>,
v8::Local<v8::Value>,
const PropertyCallbackInfo<v8::Value>&);
typedef void(*PropertyEnumeratorCallback)
(const PropertyCallbackInfo<v8::Array>&);
typedef void(*PropertyDeleterCallback)(
v8::Local<v8::String>,
const PropertyCallbackInfo<v8::Boolean>&);
typedef void(*PropertyQueryCallback)(
v8::Local<v8::String>,
const PropertyCallbackInfo<v8::Integer>&);
typedef void(*IndexGetterCallback)(
uint32_t,
const PropertyCallbackInfo<v8::Value>&);
typedef void(*IndexSetterCallback)(
uint32_t,
v8::Local<v8::Value>,
const PropertyCallbackInfo<v8::Value>&);
typedef void(*IndexEnumeratorCallback)
(const PropertyCallbackInfo<v8::Array>&);
typedef void(*IndexDeleterCallback)(
uint32_t,
const PropertyCallbackInfo<v8::Boolean>&);
typedef void(*IndexQueryCallback)(
uint32_t,
const PropertyCallbackInfo<v8::Integer>&);
namespace imp {
typedef v8::Local<v8::AccessorSignature> Sig;
static const int kDataIndex = 0;
static const int kFunctionIndex = 1;
static const int kFunctionFieldCount = 2;
static const int kGetterIndex = 1;
static const int kSetterIndex = 2;
static const int kAccessorFieldCount = 3;
static const int kPropertyGetterIndex = 1;
static const int kPropertySetterIndex = 2;
static const int kPropertyEnumeratorIndex = 3;
static const int kPropertyDeleterIndex = 4;
static const int kPropertyQueryIndex = 5;
static const int kPropertyFieldCount = 6;
static const int kIndexPropertyGetterIndex = 1;
static const int kIndexPropertySetterIndex = 2;
static const int kIndexPropertyEnumeratorIndex = 3;
static const int kIndexPropertyDeleterIndex = 4;
static const int kIndexPropertyQueryIndex = 5;
static const int kIndexPropertyFieldCount = 6;
} // end of namespace imp
#if NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION
# include "nan_callbacks_12_inl.h" // NOLINT(build/include)
#else
# include "nan_callbacks_pre_12_inl.h" // NOLINT(build/include)
#endif
#endif // NAN_CALLBACKS_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_CALLBACKS_12_INL_H_
#define NAN_CALLBACKS_12_INL_H_
template<typename T>
class ReturnValue {
v8::ReturnValue<T> value_;
public:
template <class S>
explicit inline ReturnValue(const v8::ReturnValue<S> &value) :
value_(value) {}
template <class S>
explicit inline ReturnValue(const ReturnValue<S>& that)
: value_(that.value_) {
TYPE_CHECK(T, S);
}
// Handle setters
template <typename S> inline void Set(const v8::Local<S> &handle) {
TYPE_CHECK(T, S);
value_.Set(handle);
}
template <typename S> inline void Set(const Global<S> &handle) {
TYPE_CHECK(T, S);
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && \
(V8_MINOR_VERSION > 5 || (V8_MINOR_VERSION == 5 && \
defined(V8_BUILD_NUMBER) && V8_BUILD_NUMBER >= 8))))
value_.Set(handle);
#else
value_.Set(*reinterpret_cast<const v8::Persistent<S>*>(&handle));
const_cast<Global<S> &>(handle).Reset();
#endif
}
// Fast primitive setters
inline void Set(bool value) {
TYPE_CHECK(T, v8::Boolean);
value_.Set(value);
}
inline void Set(double i) {
TYPE_CHECK(T, v8::Number);
value_.Set(i);
}
inline void Set(int32_t i) {
TYPE_CHECK(T, v8::Integer);
value_.Set(i);
}
inline void Set(uint32_t i) {
TYPE_CHECK(T, v8::Integer);
value_.Set(i);
}
// Fast JS primitive setters
inline void SetNull() {
TYPE_CHECK(T, v8::Primitive);
value_.SetNull();
}
inline void SetUndefined() {
TYPE_CHECK(T, v8::Primitive);
value_.SetUndefined();
}
inline void SetEmptyString() {
TYPE_CHECK(T, v8::String);
value_.SetEmptyString();
}
// Convenience getter for isolate
inline v8::Isolate *GetIsolate() const {
return value_.GetIsolate();
}
// Pointer setter: Uncompilable to prevent inadvertent misuse.
template<typename S>
inline void Set(S *whatever) { TYPE_CHECK(S*, v8::Primitive); }
};
template<typename T>
class FunctionCallbackInfo {
const v8::FunctionCallbackInfo<T> &info_;
const v8::Local<v8::Value> data_;
public:
explicit inline FunctionCallbackInfo(
const v8::FunctionCallbackInfo<T> &info
, v8::Local<v8::Value> data) :
info_(info)
, data_(data) {}
inline ReturnValue<T> GetReturnValue() const {
return ReturnValue<T>(info_.GetReturnValue());
}
#if NODE_MAJOR_VERSION < 10
inline v8::Local<v8::Function> Callee() const { return info_.Callee(); }
#endif
inline v8::Local<v8::Value> Data() const { return data_; }
inline v8::Local<v8::Object> Holder() const { return info_.Holder(); }
inline bool IsConstructCall() const { return info_.IsConstructCall(); }
inline int Length() const { return info_.Length(); }
inline v8::Local<v8::Value> operator[](int i) const { return info_[i]; }
inline v8::Local<v8::Object> This() const { return info_.This(); }
inline v8::Isolate *GetIsolate() const { return info_.GetIsolate(); }
protected:
static const int kHolderIndex = 0;
static const int kIsolateIndex = 1;
static const int kReturnValueDefaultValueIndex = 2;
static const int kReturnValueIndex = 3;
static const int kDataIndex = 4;
static const int kCalleeIndex = 5;
static const int kContextSaveIndex = 6;
static const int kArgsLength = 7;
private:
NAN_DISALLOW_ASSIGN_COPY_MOVE(FunctionCallbackInfo)
};
template<typename T>
class PropertyCallbackInfo {
const v8::PropertyCallbackInfo<T> &info_;
const v8::Local<v8::Value> data_;
public:
explicit inline PropertyCallbackInfo(
const v8::PropertyCallbackInfo<T> &info
, const v8::Local<v8::Value> data) :
info_(info)
, data_(data) {}
inline v8::Isolate* GetIsolate() const { return info_.GetIsolate(); }
inline v8::Local<v8::Value> Data() const { return data_; }
inline v8::Local<v8::Object> This() const { return info_.This(); }
inline v8::Local<v8::Object> Holder() const { return info_.Holder(); }
inline ReturnValue<T> GetReturnValue() const {
return ReturnValue<T>(info_.GetReturnValue());
}
protected:
static const int kHolderIndex = 0;
static const int kIsolateIndex = 1;
static const int kReturnValueDefaultValueIndex = 2;
static const int kReturnValueIndex = 3;
static const int kDataIndex = 4;
static const int kThisIndex = 5;
static const int kArgsLength = 6;
private:
NAN_DISALLOW_ASSIGN_COPY_MOVE(PropertyCallbackInfo)
};
namespace imp {
static
void FunctionCallbackWrapper(const v8::FunctionCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
FunctionCallback callback = reinterpret_cast<FunctionCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kFunctionIndex).As<v8::External>()->Value()));
FunctionCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
callback(cbinfo);
}
typedef void (*NativeFunction)(const v8::FunctionCallbackInfo<v8::Value> &);
#if NODE_MODULE_VERSION > NODE_0_12_MODULE_VERSION
static
void GetterCallbackWrapper(
v8::Local<v8::Name> property
, const v8::PropertyCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
GetterCallback callback = reinterpret_cast<GetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kGetterIndex).As<v8::External>()->Value()));
callback(property.As<v8::String>(), cbinfo);
}
typedef void (*NativeGetter)
(v8::Local<v8::Name>, const v8::PropertyCallbackInfo<v8::Value> &);
static
void SetterCallbackWrapper(
v8::Local<v8::Name> property
, v8::Local<v8::Value> value
, const v8::PropertyCallbackInfo<void> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<void>
cbinfo(info, obj->GetInternalField(kDataIndex));
SetterCallback callback = reinterpret_cast<SetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kSetterIndex).As<v8::External>()->Value()));
callback(property.As<v8::String>(), value, cbinfo);
}
typedef void (*NativeSetter)(
v8::Local<v8::Name>
, v8::Local<v8::Value>
, const v8::PropertyCallbackInfo<void> &);
#else
static
void GetterCallbackWrapper(
v8::Local<v8::String> property
, const v8::PropertyCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
GetterCallback callback = reinterpret_cast<GetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kGetterIndex).As<v8::External>()->Value()));
callback(property, cbinfo);
}
typedef void (*NativeGetter)
(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value> &);
static
void SetterCallbackWrapper(
v8::Local<v8::String> property
, v8::Local<v8::Value> value
, const v8::PropertyCallbackInfo<void> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<void>
cbinfo(info, obj->GetInternalField(kDataIndex));
SetterCallback callback = reinterpret_cast<SetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kSetterIndex).As<v8::External>()->Value()));
callback(property, value, cbinfo);
}
typedef void (*NativeSetter)(
v8::Local<v8::String>
, v8::Local<v8::Value>
, const v8::PropertyCallbackInfo<void> &);
#endif
#if NODE_MODULE_VERSION > NODE_0_12_MODULE_VERSION
static
void PropertyGetterCallbackWrapper(
v8::Local<v8::Name> property
, const v8::PropertyCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyGetterCallback callback = reinterpret_cast<PropertyGetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyGetterIndex)
.As<v8::External>()->Value()));
callback(property.As<v8::String>(), cbinfo);
}
typedef void (*NativePropertyGetter)
(v8::Local<v8::Name>, const v8::PropertyCallbackInfo<v8::Value> &);
static
void PropertySetterCallbackWrapper(
v8::Local<v8::Name> property
, v8::Local<v8::Value> value
, const v8::PropertyCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertySetterCallback callback = reinterpret_cast<PropertySetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertySetterIndex)
.As<v8::External>()->Value()));
callback(property.As<v8::String>(), value, cbinfo);
}
typedef void (*NativePropertySetter)(
v8::Local<v8::Name>
, v8::Local<v8::Value>
, const v8::PropertyCallbackInfo<v8::Value> &);
static
void PropertyEnumeratorCallbackWrapper(
const v8::PropertyCallbackInfo<v8::Array> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Array>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyEnumeratorCallback callback =
reinterpret_cast<PropertyEnumeratorCallback>(reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyEnumeratorIndex)
.As<v8::External>()->Value()));
callback(cbinfo);
}
typedef void (*NativePropertyEnumerator)
(const v8::PropertyCallbackInfo<v8::Array> &);
static
void PropertyDeleterCallbackWrapper(
v8::Local<v8::Name> property
, const v8::PropertyCallbackInfo<v8::Boolean> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Boolean>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyDeleterCallback callback = reinterpret_cast<PropertyDeleterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyDeleterIndex)
.As<v8::External>()->Value()));
callback(property.As<v8::String>(), cbinfo);
}
typedef void (NativePropertyDeleter)
(v8::Local<v8::Name>, const v8::PropertyCallbackInfo<v8::Boolean> &);
static
void PropertyQueryCallbackWrapper(
v8::Local<v8::Name> property
, const v8::PropertyCallbackInfo<v8::Integer> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Integer>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyQueryCallback callback = reinterpret_cast<PropertyQueryCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyQueryIndex)
.As<v8::External>()->Value()));
callback(property.As<v8::String>(), cbinfo);
}
typedef void (*NativePropertyQuery)
(v8::Local<v8::Name>, const v8::PropertyCallbackInfo<v8::Integer> &);
#else
static
void PropertyGetterCallbackWrapper(
v8::Local<v8::String> property
, const v8::PropertyCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyGetterCallback callback = reinterpret_cast<PropertyGetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyGetterIndex)
.As<v8::External>()->Value()));
callback(property, cbinfo);
}
typedef void (*NativePropertyGetter)
(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value> &);
static
void PropertySetterCallbackWrapper(
v8::Local<v8::String> property
, v8::Local<v8::Value> value
, const v8::PropertyCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertySetterCallback callback = reinterpret_cast<PropertySetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertySetterIndex)
.As<v8::External>()->Value()));
callback(property, value, cbinfo);
}
typedef void (*NativePropertySetter)(
v8::Local<v8::String>
, v8::Local<v8::Value>
, const v8::PropertyCallbackInfo<v8::Value> &);
static
void PropertyEnumeratorCallbackWrapper(
const v8::PropertyCallbackInfo<v8::Array> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Array>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyEnumeratorCallback callback =
reinterpret_cast<PropertyEnumeratorCallback>(reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyEnumeratorIndex)
.As<v8::External>()->Value()));
callback(cbinfo);
}
typedef void (*NativePropertyEnumerator)
(const v8::PropertyCallbackInfo<v8::Array> &);
static
void PropertyDeleterCallbackWrapper(
v8::Local<v8::String> property
, const v8::PropertyCallbackInfo<v8::Boolean> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Boolean>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyDeleterCallback callback = reinterpret_cast<PropertyDeleterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyDeleterIndex)
.As<v8::External>()->Value()));
callback(property, cbinfo);
}
typedef void (NativePropertyDeleter)
(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Boolean> &);
static
void PropertyQueryCallbackWrapper(
v8::Local<v8::String> property
, const v8::PropertyCallbackInfo<v8::Integer> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Integer>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyQueryCallback callback = reinterpret_cast<PropertyQueryCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyQueryIndex)
.As<v8::External>()->Value()));
callback(property, cbinfo);
}
typedef void (*NativePropertyQuery)
(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Integer> &);
#endif
static
void IndexGetterCallbackWrapper(
uint32_t index, const v8::PropertyCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexGetterCallback callback = reinterpret_cast<IndexGetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertyGetterIndex)
.As<v8::External>()->Value()));
callback(index, cbinfo);
}
typedef void (*NativeIndexGetter)
(uint32_t, const v8::PropertyCallbackInfo<v8::Value> &);
static
void IndexSetterCallbackWrapper(
uint32_t index
, v8::Local<v8::Value> value
, const v8::PropertyCallbackInfo<v8::Value> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexSetterCallback callback = reinterpret_cast<IndexSetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertySetterIndex)
.As<v8::External>()->Value()));
callback(index, value, cbinfo);
}
typedef void (*NativeIndexSetter)(
uint32_t
, v8::Local<v8::Value>
, const v8::PropertyCallbackInfo<v8::Value> &);
static
void IndexEnumeratorCallbackWrapper(
const v8::PropertyCallbackInfo<v8::Array> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Array>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexEnumeratorCallback callback = reinterpret_cast<IndexEnumeratorCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(
kIndexPropertyEnumeratorIndex).As<v8::External>()->Value()));
callback(cbinfo);
}
typedef void (*NativeIndexEnumerator)
(const v8::PropertyCallbackInfo<v8::Array> &);
static
void IndexDeleterCallbackWrapper(
uint32_t index, const v8::PropertyCallbackInfo<v8::Boolean> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Boolean>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexDeleterCallback callback = reinterpret_cast<IndexDeleterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertyDeleterIndex)
.As<v8::External>()->Value()));
callback(index, cbinfo);
}
typedef void (*NativeIndexDeleter)
(uint32_t, const v8::PropertyCallbackInfo<v8::Boolean> &);
static
void IndexQueryCallbackWrapper(
uint32_t index, const v8::PropertyCallbackInfo<v8::Integer> &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Integer>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexQueryCallback callback = reinterpret_cast<IndexQueryCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertyQueryIndex)
.As<v8::External>()->Value()));
callback(index, cbinfo);
}
typedef void (*NativeIndexQuery)
(uint32_t, const v8::PropertyCallbackInfo<v8::Integer> &);
} // end of namespace imp
#endif // NAN_CALLBACKS_12_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_CALLBACKS_PRE_12_INL_H_
#define NAN_CALLBACKS_PRE_12_INL_H_
namespace imp {
template<typename T> class ReturnValueImp;
} // end of namespace imp
template<typename T>
class ReturnValue {
v8::Isolate *isolate_;
v8::Persistent<T> *value_;
friend class imp::ReturnValueImp<T>;
public:
template <class S>
explicit inline ReturnValue(v8::Isolate *isolate, v8::Persistent<S> *p) :
isolate_(isolate), value_(p) {}
template <class S>
explicit inline ReturnValue(const ReturnValue<S>& that)
: isolate_(that.isolate_), value_(that.value_) {
TYPE_CHECK(T, S);
}
// Handle setters
template <typename S> inline void Set(const v8::Local<S> &handle) {
TYPE_CHECK(T, S);
value_->Dispose();
*value_ = v8::Persistent<T>::New(handle);
}
template <typename S> inline void Set(const Global<S> &handle) {
TYPE_CHECK(T, S);
value_->Dispose();
*value_ = v8::Persistent<T>::New(handle.persistent);
const_cast<Global<S> &>(handle).Reset();
}
// Fast primitive setters
inline void Set(bool value) {
v8::HandleScope scope;
TYPE_CHECK(T, v8::Boolean);
value_->Dispose();
*value_ = v8::Persistent<T>::New(v8::Boolean::New(value));
}
inline void Set(double i) {
v8::HandleScope scope;
TYPE_CHECK(T, v8::Number);
value_->Dispose();
*value_ = v8::Persistent<T>::New(v8::Number::New(i));
}
inline void Set(int32_t i) {
v8::HandleScope scope;
TYPE_CHECK(T, v8::Integer);
value_->Dispose();
*value_ = v8::Persistent<T>::New(v8::Int32::New(i));
}
inline void Set(uint32_t i) {
v8::HandleScope scope;
TYPE_CHECK(T, v8::Integer);
value_->Dispose();
*value_ = v8::Persistent<T>::New(v8::Uint32::NewFromUnsigned(i));
}
// Fast JS primitive setters
inline void SetNull() {
v8::HandleScope scope;
TYPE_CHECK(T, v8::Primitive);
value_->Dispose();
*value_ = v8::Persistent<T>::New(v8::Null());
}
inline void SetUndefined() {
v8::HandleScope scope;
TYPE_CHECK(T, v8::Primitive);
value_->Dispose();
*value_ = v8::Persistent<T>::New(v8::Undefined());
}
inline void SetEmptyString() {
v8::HandleScope scope;
TYPE_CHECK(T, v8::String);
value_->Dispose();
*value_ = v8::Persistent<T>::New(v8::String::Empty());
}
// Convenience getter for isolate
inline v8::Isolate *GetIsolate() const {
return isolate_;
}
// Pointer setter: Uncompilable to prevent inadvertent misuse.
template<typename S>
inline void Set(S *whatever) { TYPE_CHECK(S*, v8::Primitive); }
};
template<typename T>
class FunctionCallbackInfo {
const v8::Arguments &args_;
v8::Local<v8::Value> data_;
ReturnValue<T> return_value_;
v8::Persistent<T> retval_;
public:
explicit inline FunctionCallbackInfo(
const v8::Arguments &args
, v8::Local<v8::Value> data) :
args_(args)
, data_(data)
, return_value_(args.GetIsolate(), &retval_)
, retval_(v8::Persistent<T>::New(v8::Undefined())) {}
inline ~FunctionCallbackInfo() {
retval_.Dispose();
retval_.Clear();
}
inline ReturnValue<T> GetReturnValue() const {
return ReturnValue<T>(return_value_);
}
inline v8::Local<v8::Function> Callee() const { return args_.Callee(); }
inline v8::Local<v8::Value> Data() const { return data_; }
inline v8::Local<v8::Object> Holder() const { return args_.Holder(); }
inline bool IsConstructCall() const { return args_.IsConstructCall(); }
inline int Length() const { return args_.Length(); }
inline v8::Local<v8::Value> operator[](int i) const { return args_[i]; }
inline v8::Local<v8::Object> This() const { return args_.This(); }
inline v8::Isolate *GetIsolate() const { return args_.GetIsolate(); }
protected:
static const int kHolderIndex = 0;
static const int kIsolateIndex = 1;
static const int kReturnValueDefaultValueIndex = 2;
static const int kReturnValueIndex = 3;
static const int kDataIndex = 4;
static const int kCalleeIndex = 5;
static const int kContextSaveIndex = 6;
static const int kArgsLength = 7;
private:
NAN_DISALLOW_ASSIGN_COPY_MOVE(FunctionCallbackInfo)
};
template<typename T>
class PropertyCallbackInfoBase {
const v8::AccessorInfo &info_;
const v8::Local<v8::Value> data_;
public:
explicit inline PropertyCallbackInfoBase(
const v8::AccessorInfo &info
, const v8::Local<v8::Value> data) :
info_(info)
, data_(data) {}
inline v8::Isolate* GetIsolate() const { return info_.GetIsolate(); }
inline v8::Local<v8::Value> Data() const { return data_; }
inline v8::Local<v8::Object> This() const { return info_.This(); }
inline v8::Local<v8::Object> Holder() const { return info_.Holder(); }
protected:
static const int kHolderIndex = 0;
static const int kIsolateIndex = 1;
static const int kReturnValueDefaultValueIndex = 2;
static const int kReturnValueIndex = 3;
static const int kDataIndex = 4;
static const int kThisIndex = 5;
static const int kArgsLength = 6;
private:
NAN_DISALLOW_ASSIGN_COPY_MOVE(PropertyCallbackInfoBase)
};
template<typename T>
class PropertyCallbackInfo : public PropertyCallbackInfoBase<T> {
ReturnValue<T> return_value_;
v8::Persistent<T> retval_;
public:
explicit inline PropertyCallbackInfo(
const v8::AccessorInfo &info
, const v8::Local<v8::Value> data) :
PropertyCallbackInfoBase<T>(info, data)
, return_value_(info.GetIsolate(), &retval_)
, retval_(v8::Persistent<T>::New(v8::Undefined())) {}
inline ~PropertyCallbackInfo() {
retval_.Dispose();
retval_.Clear();
}
inline ReturnValue<T> GetReturnValue() const { return return_value_; }
};
template<>
class PropertyCallbackInfo<v8::Array> :
public PropertyCallbackInfoBase<v8::Array> {
ReturnValue<v8::Array> return_value_;
v8::Persistent<v8::Array> retval_;
public:
explicit inline PropertyCallbackInfo(
const v8::AccessorInfo &info
, const v8::Local<v8::Value> data) :
PropertyCallbackInfoBase<v8::Array>(info, data)
, return_value_(info.GetIsolate(), &retval_)
, retval_(v8::Persistent<v8::Array>::New(v8::Local<v8::Array>())) {}
inline ~PropertyCallbackInfo() {
retval_.Dispose();
retval_.Clear();
}
inline ReturnValue<v8::Array> GetReturnValue() const {
return return_value_;
}
};
template<>
class PropertyCallbackInfo<v8::Boolean> :
public PropertyCallbackInfoBase<v8::Boolean> {
ReturnValue<v8::Boolean> return_value_;
v8::Persistent<v8::Boolean> retval_;
public:
explicit inline PropertyCallbackInfo(
const v8::AccessorInfo &info
, const v8::Local<v8::Value> data) :
PropertyCallbackInfoBase<v8::Boolean>(info, data)
, return_value_(info.GetIsolate(), &retval_)
, retval_(v8::Persistent<v8::Boolean>::New(v8::Local<v8::Boolean>())) {}
inline ~PropertyCallbackInfo() {
retval_.Dispose();
retval_.Clear();
}
inline ReturnValue<v8::Boolean> GetReturnValue() const {
return return_value_;
}
};
template<>
class PropertyCallbackInfo<v8::Integer> :
public PropertyCallbackInfoBase<v8::Integer> {
ReturnValue<v8::Integer> return_value_;
v8::Persistent<v8::Integer> retval_;
public:
explicit inline PropertyCallbackInfo(
const v8::AccessorInfo &info
, const v8::Local<v8::Value> data) :
PropertyCallbackInfoBase<v8::Integer>(info, data)
, return_value_(info.GetIsolate(), &retval_)
, retval_(v8::Persistent<v8::Integer>::New(v8::Local<v8::Integer>())) {}
inline ~PropertyCallbackInfo() {
retval_.Dispose();
retval_.Clear();
}
inline ReturnValue<v8::Integer> GetReturnValue() const {
return return_value_;
}
};
namespace imp {
template<typename T>
class ReturnValueImp : public ReturnValue<T> {
public:
explicit ReturnValueImp(ReturnValue<T> that) :
ReturnValue<T>(that) {}
inline v8::Handle<T> Value() {
return *ReturnValue<T>::value_;
}
};
static
v8::Handle<v8::Value> FunctionCallbackWrapper(const v8::Arguments &args) {
v8::Local<v8::Object> obj = args.Data().As<v8::Object>();
FunctionCallback callback = reinterpret_cast<FunctionCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kFunctionIndex).As<v8::External>()->Value()));
FunctionCallbackInfo<v8::Value>
cbinfo(args, obj->GetInternalField(kDataIndex));
callback(cbinfo);
return ReturnValueImp<v8::Value>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Value> (*NativeFunction)(const v8::Arguments &);
static
v8::Handle<v8::Value> GetterCallbackWrapper(
v8::Local<v8::String> property, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
GetterCallback callback = reinterpret_cast<GetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kGetterIndex).As<v8::External>()->Value()));
callback(property, cbinfo);
return ReturnValueImp<v8::Value>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Value> (*NativeGetter)
(v8::Local<v8::String>, const v8::AccessorInfo &);
static
void SetterCallbackWrapper(
v8::Local<v8::String> property
, v8::Local<v8::Value> value
, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<void>
cbinfo(info, obj->GetInternalField(kDataIndex));
SetterCallback callback = reinterpret_cast<SetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kSetterIndex).As<v8::External>()->Value()));
callback(property, value, cbinfo);
}
typedef void (*NativeSetter)
(v8::Local<v8::String>, v8::Local<v8::Value>, const v8::AccessorInfo &);
static
v8::Handle<v8::Value> PropertyGetterCallbackWrapper(
v8::Local<v8::String> property, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyGetterCallback callback = reinterpret_cast<PropertyGetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyGetterIndex)
.As<v8::External>()->Value()));
callback(property, cbinfo);
return ReturnValueImp<v8::Value>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Value> (*NativePropertyGetter)
(v8::Local<v8::String>, const v8::AccessorInfo &);
static
v8::Handle<v8::Value> PropertySetterCallbackWrapper(
v8::Local<v8::String> property
, v8::Local<v8::Value> value
, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertySetterCallback callback = reinterpret_cast<PropertySetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertySetterIndex)
.As<v8::External>()->Value()));
callback(property, value, cbinfo);
return ReturnValueImp<v8::Value>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Value> (*NativePropertySetter)
(v8::Local<v8::String>, v8::Local<v8::Value>, const v8::AccessorInfo &);
static
v8::Handle<v8::Array> PropertyEnumeratorCallbackWrapper(
const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Array>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyEnumeratorCallback callback =
reinterpret_cast<PropertyEnumeratorCallback>(reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyEnumeratorIndex)
.As<v8::External>()->Value()));
callback(cbinfo);
return ReturnValueImp<v8::Array>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Array> (*NativePropertyEnumerator)
(const v8::AccessorInfo &);
static
v8::Handle<v8::Boolean> PropertyDeleterCallbackWrapper(
v8::Local<v8::String> property
, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Boolean>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyDeleterCallback callback = reinterpret_cast<PropertyDeleterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyDeleterIndex)
.As<v8::External>()->Value()));
callback(property, cbinfo);
return ReturnValueImp<v8::Boolean>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Boolean> (NativePropertyDeleter)
(v8::Local<v8::String>, const v8::AccessorInfo &);
static
v8::Handle<v8::Integer> PropertyQueryCallbackWrapper(
v8::Local<v8::String> property, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Integer>
cbinfo(info, obj->GetInternalField(kDataIndex));
PropertyQueryCallback callback = reinterpret_cast<PropertyQueryCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kPropertyQueryIndex)
.As<v8::External>()->Value()));
callback(property, cbinfo);
return ReturnValueImp<v8::Integer>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Integer> (*NativePropertyQuery)
(v8::Local<v8::String>, const v8::AccessorInfo &);
static
v8::Handle<v8::Value> IndexGetterCallbackWrapper(
uint32_t index, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexGetterCallback callback = reinterpret_cast<IndexGetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertyGetterIndex)
.As<v8::External>()->Value()));
callback(index, cbinfo);
return ReturnValueImp<v8::Value>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Value> (*NativeIndexGetter)
(uint32_t, const v8::AccessorInfo &);
static
v8::Handle<v8::Value> IndexSetterCallbackWrapper(
uint32_t index
, v8::Local<v8::Value> value
, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Value>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexSetterCallback callback = reinterpret_cast<IndexSetterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertySetterIndex)
.As<v8::External>()->Value()));
callback(index, value, cbinfo);
return ReturnValueImp<v8::Value>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Value> (*NativeIndexSetter)
(uint32_t, v8::Local<v8::Value>, const v8::AccessorInfo &);
static
v8::Handle<v8::Array> IndexEnumeratorCallbackWrapper(
const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Array>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexEnumeratorCallback callback = reinterpret_cast<IndexEnumeratorCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertyEnumeratorIndex)
.As<v8::External>()->Value()));
callback(cbinfo);
return ReturnValueImp<v8::Array>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Array> (*NativeIndexEnumerator)
(const v8::AccessorInfo &);
static
v8::Handle<v8::Boolean> IndexDeleterCallbackWrapper(
uint32_t index, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Boolean>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexDeleterCallback callback = reinterpret_cast<IndexDeleterCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertyDeleterIndex)
.As<v8::External>()->Value()));
callback(index, cbinfo);
return ReturnValueImp<v8::Boolean>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Boolean> (*NativeIndexDeleter)
(uint32_t, const v8::AccessorInfo &);
static
v8::Handle<v8::Integer> IndexQueryCallbackWrapper(
uint32_t index, const v8::AccessorInfo &info) {
v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
PropertyCallbackInfo<v8::Integer>
cbinfo(info, obj->GetInternalField(kDataIndex));
IndexQueryCallback callback = reinterpret_cast<IndexQueryCallback>(
reinterpret_cast<intptr_t>(
obj->GetInternalField(kIndexPropertyQueryIndex)
.As<v8::External>()->Value()));
callback(index, cbinfo);
return ReturnValueImp<v8::Integer>(cbinfo.GetReturnValue()).Value();
}
typedef v8::Handle<v8::Integer> (*NativeIndexQuery)
(uint32_t, const v8::AccessorInfo &);
} // end of namespace imp
#endif // NAN_CALLBACKS_PRE_12_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_CONVERTERS_H_
#define NAN_CONVERTERS_H_
namespace imp {
template<typename T> struct ToFactoryBase {
typedef MaybeLocal<T> return_t;
};
template<typename T> struct ValueFactoryBase { typedef Maybe<T> return_t; };
template<typename T> struct ToFactory;
template<>
struct ToFactory<v8::Function> : ToFactoryBase<v8::Function> {
static inline return_t convert(v8::Local<v8::Value> val) {
if (val.IsEmpty() || !val->IsFunction()) return MaybeLocal<v8::Function>();
return MaybeLocal<v8::Function>(val.As<v8::Function>());
}
};
#define X(TYPE) \
template<> \
struct ToFactory<v8::TYPE> : ToFactoryBase<v8::TYPE> { \
static inline return_t convert(v8::Local<v8::Value> val); \
};
X(Boolean)
X(Number)
X(String)
X(Object)
X(Integer)
X(Uint32)
X(Int32)
#undef X
#define X(TYPE) \
template<> \
struct ToFactory<TYPE> : ValueFactoryBase<TYPE> { \
static inline return_t convert(v8::Local<v8::Value> val); \
};
X(bool)
X(double)
X(int64_t)
X(uint32_t)
X(int32_t)
#undef X
} // end of namespace imp
template<typename T>
inline
typename imp::ToFactory<T>::return_t To(v8::Local<v8::Value> val) {
return imp::ToFactory<T>::convert(val);
}
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
# include "nan_converters_43_inl.h"
#else
# include "nan_converters_pre_43_inl.h"
#endif
#endif // NAN_CONVERTERS_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_CONVERTERS_43_INL_H_
#define NAN_CONVERTERS_43_INL_H_
#define X(TYPE) \
imp::ToFactory<v8::TYPE>::return_t \
imp::ToFactory<v8::TYPE>::convert(v8::Local<v8::Value> val) { \
v8::Isolate *isolate = v8::Isolate::GetCurrent(); \
v8::EscapableHandleScope scope(isolate); \
return scope.Escape( \
val->To ## TYPE(isolate->GetCurrentContext()) \
.FromMaybe(v8::Local<v8::TYPE>())); \
}
X(Number)
X(String)
X(Object)
X(Integer)
X(Uint32)
X(Int32)
// V8 <= 7.0
#if V8_MAJOR_VERSION < 7 || (V8_MAJOR_VERSION == 7 && V8_MINOR_VERSION == 0)
X(Boolean)
#else
imp::ToFactory<v8::Boolean>::return_t \
imp::ToFactory<v8::Boolean>::convert(v8::Local<v8::Value> val) { \
v8::Isolate *isolate = v8::Isolate::GetCurrent(); \
v8::EscapableHandleScope scope(isolate); \
return scope.Escape(val->ToBoolean(isolate)); \
}
#endif
#undef X
#define X(TYPE, NAME) \
imp::ToFactory<TYPE>::return_t \
imp::ToFactory<TYPE>::convert(v8::Local<v8::Value> val) { \
v8::Isolate *isolate = v8::Isolate::GetCurrent(); \
v8::HandleScope scope(isolate); \
return val->NAME ## Value(isolate->GetCurrentContext()); \
}
X(double, Number)
X(int64_t, Integer)
X(uint32_t, Uint32)
X(int32_t, Int32)
// V8 <= 7.0
#if V8_MAJOR_VERSION < 7 || (V8_MAJOR_VERSION == 7 && V8_MINOR_VERSION == 0)
X(bool, Boolean)
#else
imp::ToFactory<bool>::return_t \
imp::ToFactory<bool>::convert(v8::Local<v8::Value> val) { \
v8::Isolate *isolate = v8::Isolate::GetCurrent(); \
v8::HandleScope scope(isolate); \
return Just<bool>(val->BooleanValue(isolate)); \
}
#endif
#undef X
#endif // NAN_CONVERTERS_43_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_CONVERTERS_PRE_43_INL_H_
#define NAN_CONVERTERS_PRE_43_INL_H_
#define X(TYPE) \
imp::ToFactory<v8::TYPE>::return_t \
imp::ToFactory<v8::TYPE>::convert(v8::Local<v8::Value> val) { \
return val->To ## TYPE(); \
}
X(Boolean)
X(Number)
X(String)
X(Object)
X(Integer)
X(Uint32)
X(Int32)
#undef X
#define X(TYPE, NAME) \
imp::ToFactory<TYPE>::return_t \
imp::ToFactory<TYPE>::convert(v8::Local<v8::Value> val) { \
return Just(val->NAME ## Value()); \
}
X(bool, Boolean)
X(double, Number)
X(int64_t, Integer)
X(uint32_t, Uint32)
X(int32_t, Int32)
#undef X
#endif // NAN_CONVERTERS_PRE_43_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_DEFINE_OWN_PROPERTY_HELPER_H_
#define NAN_DEFINE_OWN_PROPERTY_HELPER_H_
namespace imp {
inline Maybe<bool> DefineOwnPropertyHelper(
v8::PropertyAttribute current
, v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key
, v8::Handle<v8::Value> value
, v8::PropertyAttribute attribs = v8::None) {
return !(current & v8::DontDelete) || // configurable OR
(!(current & v8::ReadOnly) && // writable AND
!((attribs ^ current) & ~v8::ReadOnly)) // same excluding RO
? Just<bool>(obj->ForceSet(key, value, attribs))
: Nothing<bool>();
}
} // end of namespace imp
#endif // NAN_DEFINE_OWN_PROPERTY_HELPER_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_IMPLEMENTATION_12_INL_H_
#define NAN_IMPLEMENTATION_12_INL_H_
//==============================================================================
// node v0.11 implementation
//==============================================================================
namespace imp {
//=== Array ====================================================================
Factory<v8::Array>::return_t
Factory<v8::Array>::New() {
return v8::Array::New(v8::Isolate::GetCurrent());
}
Factory<v8::Array>::return_t
Factory<v8::Array>::New(int length) {
return v8::Array::New(v8::Isolate::GetCurrent(), length);
}
//=== Boolean ==================================================================
Factory<v8::Boolean>::return_t
Factory<v8::Boolean>::New(bool value) {
return v8::Boolean::New(v8::Isolate::GetCurrent(), value);
}
//=== Boolean Object ===========================================================
Factory<v8::BooleanObject>::return_t
Factory<v8::BooleanObject>::New(bool value) {
#if (NODE_MODULE_VERSION >= NODE_6_0_MODULE_VERSION)
return v8::BooleanObject::New(
v8::Isolate::GetCurrent(), value).As<v8::BooleanObject>();
#else
return v8::BooleanObject::New(value).As<v8::BooleanObject>();
#endif
}
//=== Context ==================================================================
Factory<v8::Context>::return_t
Factory<v8::Context>::New( v8::ExtensionConfiguration* extensions
, v8::Local<v8::ObjectTemplate> tmpl
, v8::Local<v8::Value> obj) {
return v8::Context::New(v8::Isolate::GetCurrent(), extensions, tmpl, obj);
}
//=== Date =====================================================================
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
Factory<v8::Date>::return_t
Factory<v8::Date>::New(double value) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(v8::Date::New(isolate->GetCurrentContext(), value)
.FromMaybe(v8::Local<v8::Value>()).As<v8::Date>());
}
#else
Factory<v8::Date>::return_t
Factory<v8::Date>::New(double value) {
return v8::Date::New(v8::Isolate::GetCurrent(), value).As<v8::Date>();
}
#endif
//=== External =================================================================
Factory<v8::External>::return_t
Factory<v8::External>::New(void * value) {
return v8::External::New(v8::Isolate::GetCurrent(), value);
}
//=== Function =================================================================
Factory<v8::Function>::return_t
Factory<v8::Function>::New( FunctionCallback callback
, v8::Local<v8::Value> data) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> tpl = v8::ObjectTemplate::New(isolate);
tpl->SetInternalFieldCount(imp::kFunctionFieldCount);
v8::Local<v8::Object> obj = NewInstance(tpl).ToLocalChecked();
obj->SetInternalField(
imp::kFunctionIndex
, v8::External::New(isolate, reinterpret_cast<void *>(callback)));
v8::Local<v8::Value> val = v8::Local<v8::Value>::New(isolate, data);
if (!val.IsEmpty()) {
obj->SetInternalField(imp::kDataIndex, val);
}
#if NODE_MAJOR_VERSION >= 10
v8::Local<v8::Context> context = isolate->GetCurrentContext();
v8::Local<v8::Function> function =
v8::Function::New(context, imp::FunctionCallbackWrapper, obj)
.ToLocalChecked();
#else
v8::Local<v8::Function> function =
v8::Function::New(isolate, imp::FunctionCallbackWrapper, obj);
#endif
return scope.Escape(function);
}
//=== Function Template ========================================================
Factory<v8::FunctionTemplate>::return_t
Factory<v8::FunctionTemplate>::New( FunctionCallback callback
, v8::Local<v8::Value> data
, v8::Local<v8::Signature> signature) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
if (callback) {
v8::EscapableHandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> tpl = v8::ObjectTemplate::New(isolate);
tpl->SetInternalFieldCount(imp::kFunctionFieldCount);
v8::Local<v8::Object> obj = NewInstance(tpl).ToLocalChecked();
obj->SetInternalField(
imp::kFunctionIndex
, v8::External::New(isolate, reinterpret_cast<void *>(callback)));
v8::Local<v8::Value> val = v8::Local<v8::Value>::New(isolate, data);
if (!val.IsEmpty()) {
obj->SetInternalField(imp::kDataIndex, val);
}
return scope.Escape(v8::FunctionTemplate::New( isolate
, imp::FunctionCallbackWrapper
, obj
, signature));
} else {
return v8::FunctionTemplate::New(isolate, 0, data, signature);
}
}
//=== Number ===================================================================
Factory<v8::Number>::return_t
Factory<v8::Number>::New(double value) {
return v8::Number::New(v8::Isolate::GetCurrent(), value);
}
//=== Number Object ============================================================
Factory<v8::NumberObject>::return_t
Factory<v8::NumberObject>::New(double value) {
return v8::NumberObject::New( v8::Isolate::GetCurrent()
, value).As<v8::NumberObject>();
}
//=== Integer, Int32 and Uint32 ================================================
template <typename T>
typename IntegerFactory<T>::return_t
IntegerFactory<T>::New(int32_t value) {
return To<T>(T::New(v8::Isolate::GetCurrent(), value));
}
template <typename T>
typename IntegerFactory<T>::return_t
IntegerFactory<T>::New(uint32_t value) {
return To<T>(T::NewFromUnsigned(v8::Isolate::GetCurrent(), value));
}
Factory<v8::Uint32>::return_t
Factory<v8::Uint32>::New(int32_t value) {
return To<v8::Uint32>(
v8::Uint32::NewFromUnsigned(v8::Isolate::GetCurrent(), value));
}
Factory<v8::Uint32>::return_t
Factory<v8::Uint32>::New(uint32_t value) {
return To<v8::Uint32>(
v8::Uint32::NewFromUnsigned(v8::Isolate::GetCurrent(), value));
}
//=== Object ===================================================================
Factory<v8::Object>::return_t
Factory<v8::Object>::New() {
return v8::Object::New(v8::Isolate::GetCurrent());
}
//=== Object Template ==========================================================
Factory<v8::ObjectTemplate>::return_t
Factory<v8::ObjectTemplate>::New() {
return v8::ObjectTemplate::New(v8::Isolate::GetCurrent());
}
//=== RegExp ===================================================================
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
Factory<v8::RegExp>::return_t
Factory<v8::RegExp>::New(
v8::Local<v8::String> pattern
, v8::RegExp::Flags flags) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(
v8::RegExp::New(isolate->GetCurrentContext(), pattern, flags)
.FromMaybe(v8::Local<v8::RegExp>()));
}
#else
Factory<v8::RegExp>::return_t
Factory<v8::RegExp>::New(
v8::Local<v8::String> pattern
, v8::RegExp::Flags flags) {
return v8::RegExp::New(pattern, flags);
}
#endif
//=== Script ===================================================================
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
Factory<v8::Script>::return_t
Factory<v8::Script>::New( v8::Local<v8::String> source) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
v8::ScriptCompiler::Source src(source);
return scope.Escape(
v8::ScriptCompiler::Compile(isolate->GetCurrentContext(), &src)
.FromMaybe(v8::Local<v8::Script>()));
}
Factory<v8::Script>::return_t
Factory<v8::Script>::New( v8::Local<v8::String> source
, v8::ScriptOrigin const& origin) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
v8::ScriptCompiler::Source src(source, origin);
return scope.Escape(
v8::ScriptCompiler::Compile(isolate->GetCurrentContext(), &src)
.FromMaybe(v8::Local<v8::Script>()));
}
#else
Factory<v8::Script>::return_t
Factory<v8::Script>::New( v8::Local<v8::String> source) {
v8::ScriptCompiler::Source src(source);
return v8::ScriptCompiler::Compile(v8::Isolate::GetCurrent(), &src);
}
Factory<v8::Script>::return_t
Factory<v8::Script>::New( v8::Local<v8::String> source
, v8::ScriptOrigin const& origin) {
v8::ScriptCompiler::Source src(source, origin);
return v8::ScriptCompiler::Compile(v8::Isolate::GetCurrent(), &src);
}
#endif
//=== Signature ================================================================
Factory<v8::Signature>::return_t
Factory<v8::Signature>::New(Factory<v8::Signature>::FTH receiver) {
return v8::Signature::New(v8::Isolate::GetCurrent(), receiver);
}
//=== String ===================================================================
Factory<v8::String>::return_t
Factory<v8::String>::New() {
return v8::String::Empty(v8::Isolate::GetCurrent());
}
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
Factory<v8::String>::return_t
Factory<v8::String>::New(const char * value, int length) {
return v8::String::NewFromUtf8(
v8::Isolate::GetCurrent(), value, v8::NewStringType::kNormal, length);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(std::string const& value) {
assert(value.size() <= INT_MAX && "string too long");
return v8::String::NewFromUtf8(v8::Isolate::GetCurrent(),
value.data(), v8::NewStringType::kNormal, static_cast<int>(value.size()));
}
Factory<v8::String>::return_t
Factory<v8::String>::New(const uint16_t * value, int length) {
return v8::String::NewFromTwoByte(v8::Isolate::GetCurrent(), value,
v8::NewStringType::kNormal, length);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(v8::String::ExternalStringResource * value) {
return v8::String::NewExternalTwoByte(v8::Isolate::GetCurrent(), value);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(ExternalOneByteStringResource * value) {
return v8::String::NewExternalOneByte(v8::Isolate::GetCurrent(), value);
}
#else
Factory<v8::String>::return_t
Factory<v8::String>::New(const char * value, int length) {
return v8::String::NewFromUtf8(v8::Isolate::GetCurrent(), value,
v8::String::kNormalString, length);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(
std::string const& value) /* NOLINT(build/include_what_you_use) */ {
assert(value.size() <= INT_MAX && "string too long");
return v8::String::NewFromUtf8(v8::Isolate::GetCurrent(), value.data(),
v8::String::kNormalString,
static_cast<int>(value.size()));
}
Factory<v8::String>::return_t
Factory<v8::String>::New(const uint16_t * value, int length) {
return v8::String::NewFromTwoByte(v8::Isolate::GetCurrent(), value,
v8::String::kNormalString, length);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(v8::String::ExternalStringResource * value) {
return v8::String::NewExternal(v8::Isolate::GetCurrent(), value);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(ExternalOneByteStringResource * value) {
return v8::String::NewExternal(v8::Isolate::GetCurrent(), value);
}
#endif
//=== String Object ============================================================
// See https://github.com/nodejs/nan/pull/811#discussion_r224594980.
// Disable the warning as there is no way around it.
// TODO(bnoordhuis) Use isolate-based version in Node.js v12.
Factory<v8::StringObject>::return_t
Factory<v8::StringObject>::New(v8::Local<v8::String> value) {
// V8 > 7.0
#if V8_MAJOR_VERSION > 7 || (V8_MAJOR_VERSION == 7 && V8_MINOR_VERSION > 0)
return v8::StringObject::New(v8::Isolate::GetCurrent(), value)
.As<v8::StringObject>();
#else
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4996)
#endif
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
return v8::StringObject::New(value).As<v8::StringObject>();
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif
}
//=== Unbound Script ===========================================================
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
Factory<v8::UnboundScript>::return_t
Factory<v8::UnboundScript>::New(v8::Local<v8::String> source) {
v8::ScriptCompiler::Source src(source);
return v8::ScriptCompiler::CompileUnboundScript(
v8::Isolate::GetCurrent(), &src);
}
Factory<v8::UnboundScript>::return_t
Factory<v8::UnboundScript>::New( v8::Local<v8::String> source
, v8::ScriptOrigin const& origin) {
v8::ScriptCompiler::Source src(source, origin);
return v8::ScriptCompiler::CompileUnboundScript(
v8::Isolate::GetCurrent(), &src);
}
#else
Factory<v8::UnboundScript>::return_t
Factory<v8::UnboundScript>::New(v8::Local<v8::String> source) {
v8::ScriptCompiler::Source src(source);
return v8::ScriptCompiler::CompileUnbound(v8::Isolate::GetCurrent(), &src);
}
Factory<v8::UnboundScript>::return_t
Factory<v8::UnboundScript>::New( v8::Local<v8::String> source
, v8::ScriptOrigin const& origin) {
v8::ScriptCompiler::Source src(source, origin);
return v8::ScriptCompiler::CompileUnbound(v8::Isolate::GetCurrent(), &src);
}
#endif
} // end of namespace imp
//=== Presistents and Handles ==================================================
#if NODE_MODULE_VERSION < IOJS_3_0_MODULE_VERSION
template <typename T>
inline v8::Local<T> New(v8::Handle<T> h) {
return v8::Local<T>::New(v8::Isolate::GetCurrent(), h);
}
#endif
template <typename T, typename M>
inline v8::Local<T> New(v8::Persistent<T, M> const& p) {
return v8::Local<T>::New(v8::Isolate::GetCurrent(), p);
}
template <typename T, typename M>
inline v8::Local<T> New(Persistent<T, M> const& p) {
return v8::Local<T>::New(v8::Isolate::GetCurrent(), p);
}
template <typename T>
inline v8::Local<T> New(Global<T> const& p) {
return v8::Local<T>::New(v8::Isolate::GetCurrent(), p);
}
#endif // NAN_IMPLEMENTATION_12_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_IMPLEMENTATION_PRE_12_INL_H_
#define NAN_IMPLEMENTATION_PRE_12_INL_H_
//==============================================================================
// node v0.10 implementation
//==============================================================================
namespace imp {
//=== Array ====================================================================
Factory<v8::Array>::return_t
Factory<v8::Array>::New() {
return v8::Array::New();
}
Factory<v8::Array>::return_t
Factory<v8::Array>::New(int length) {
return v8::Array::New(length);
}
//=== Boolean ==================================================================
Factory<v8::Boolean>::return_t
Factory<v8::Boolean>::New(bool value) {
return v8::Boolean::New(value)->ToBoolean();
}
//=== Boolean Object ===========================================================
Factory<v8::BooleanObject>::return_t
Factory<v8::BooleanObject>::New(bool value) {
return v8::BooleanObject::New(value).As<v8::BooleanObject>();
}
//=== Context ==================================================================
Factory<v8::Context>::return_t
Factory<v8::Context>::New( v8::ExtensionConfiguration* extensions
, v8::Local<v8::ObjectTemplate> tmpl
, v8::Local<v8::Value> obj) {
v8::Persistent<v8::Context> ctx = v8::Context::New(extensions, tmpl, obj);
v8::Local<v8::Context> lctx = v8::Local<v8::Context>::New(ctx);
ctx.Dispose();
return lctx;
}
//=== Date =====================================================================
Factory<v8::Date>::return_t
Factory<v8::Date>::New(double value) {
return v8::Date::New(value).As<v8::Date>();
}
//=== External =================================================================
Factory<v8::External>::return_t
Factory<v8::External>::New(void * value) {
return v8::External::New(value);
}
//=== Function =================================================================
Factory<v8::Function>::return_t
Factory<v8::Function>::New( FunctionCallback callback
, v8::Local<v8::Value> data) {
v8::HandleScope scope;
return scope.Close(Factory<v8::FunctionTemplate>::New(
callback, data, v8::Local<v8::Signature>())
->GetFunction());
}
//=== FunctionTemplate =========================================================
Factory<v8::FunctionTemplate>::return_t
Factory<v8::FunctionTemplate>::New( FunctionCallback callback
, v8::Local<v8::Value> data
, v8::Local<v8::Signature> signature) {
if (callback) {
v8::HandleScope scope;
v8::Local<v8::ObjectTemplate> tpl = v8::ObjectTemplate::New();
tpl->SetInternalFieldCount(imp::kFunctionFieldCount);
v8::Local<v8::Object> obj = tpl->NewInstance();
obj->SetInternalField(
imp::kFunctionIndex
, v8::External::New(reinterpret_cast<void *>(callback)));
v8::Local<v8::Value> val = v8::Local<v8::Value>::New(data);
if (!val.IsEmpty()) {
obj->SetInternalField(imp::kDataIndex, val);
}
// Note(agnat): Emulate length argument here. Unfortunately, I couldn't find
// a way. Have at it though...
return scope.Close(
v8::FunctionTemplate::New(imp::FunctionCallbackWrapper
, obj
, signature));
} else {
return v8::FunctionTemplate::New(0, data, signature);
}
}
//=== Number ===================================================================
Factory<v8::Number>::return_t
Factory<v8::Number>::New(double value) {
return v8::Number::New(value);
}
//=== Number Object ============================================================
Factory<v8::NumberObject>::return_t
Factory<v8::NumberObject>::New(double value) {
return v8::NumberObject::New(value).As<v8::NumberObject>();
}
//=== Integer, Int32 and Uint32 ================================================
template <typename T>
typename IntegerFactory<T>::return_t
IntegerFactory<T>::New(int32_t value) {
return To<T>(T::New(value));
}
template <typename T>
typename IntegerFactory<T>::return_t
IntegerFactory<T>::New(uint32_t value) {
return To<T>(T::NewFromUnsigned(value));
}
Factory<v8::Uint32>::return_t
Factory<v8::Uint32>::New(int32_t value) {
return To<v8::Uint32>(v8::Uint32::NewFromUnsigned(value));
}
Factory<v8::Uint32>::return_t
Factory<v8::Uint32>::New(uint32_t value) {
return To<v8::Uint32>(v8::Uint32::NewFromUnsigned(value));
}
//=== Object ===================================================================
Factory<v8::Object>::return_t
Factory<v8::Object>::New() {
return v8::Object::New();
}
//=== Object Template ==========================================================
Factory<v8::ObjectTemplate>::return_t
Factory<v8::ObjectTemplate>::New() {
return v8::ObjectTemplate::New();
}
//=== RegExp ===================================================================
Factory<v8::RegExp>::return_t
Factory<v8::RegExp>::New(
v8::Local<v8::String> pattern
, v8::RegExp::Flags flags) {
return v8::RegExp::New(pattern, flags);
}
//=== Script ===================================================================
Factory<v8::Script>::return_t
Factory<v8::Script>::New( v8::Local<v8::String> source) {
return v8::Script::New(source);
}
Factory<v8::Script>::return_t
Factory<v8::Script>::New( v8::Local<v8::String> source
, v8::ScriptOrigin const& origin) {
return v8::Script::New(source, const_cast<v8::ScriptOrigin*>(&origin));
}
//=== Signature ================================================================
Factory<v8::Signature>::return_t
Factory<v8::Signature>::New(Factory<v8::Signature>::FTH receiver) {
return v8::Signature::New(receiver);
}
//=== String ===================================================================
Factory<v8::String>::return_t
Factory<v8::String>::New() {
return v8::String::Empty();
}
Factory<v8::String>::return_t
Factory<v8::String>::New(const char * value, int length) {
return v8::String::New(value, length);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(
std::string const& value) /* NOLINT(build/include_what_you_use) */ {
assert(value.size() <= INT_MAX && "string too long");
return v8::String::New(value.data(), static_cast<int>(value.size()));
}
Factory<v8::String>::return_t
Factory<v8::String>::New(const uint16_t * value, int length) {
return v8::String::New(value, length);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(v8::String::ExternalStringResource * value) {
return v8::String::NewExternal(value);
}
Factory<v8::String>::return_t
Factory<v8::String>::New(v8::String::ExternalAsciiStringResource * value) {
return v8::String::NewExternal(value);
}
//=== String Object ============================================================
Factory<v8::StringObject>::return_t
Factory<v8::StringObject>::New(v8::Local<v8::String> value) {
return v8::StringObject::New(value).As<v8::StringObject>();
}
} // end of namespace imp
//=== Presistents and Handles ==================================================
template <typename T>
inline v8::Local<T> New(v8::Handle<T> h) {
return v8::Local<T>::New(h);
}
template <typename T>
inline v8::Local<T> New(v8::Persistent<T> const& p) {
return v8::Local<T>::New(p);
}
template <typename T, typename M>
inline v8::Local<T> New(Persistent<T, M> const& p) {
return v8::Local<T>::New(p.persistent);
}
template <typename T>
inline v8::Local<T> New(Global<T> const& p) {
return v8::Local<T>::New(p.persistent);
}
#endif // NAN_IMPLEMENTATION_PRE_12_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_JSON_H_
#define NAN_JSON_H_
#if NODE_MODULE_VERSION < NODE_0_12_MODULE_VERSION
#define NAN_JSON_H_NEED_PARSE 1
#else
#define NAN_JSON_H_NEED_PARSE 0
#endif // NODE_MODULE_VERSION < NODE_0_12_MODULE_VERSION
#if NODE_MODULE_VERSION >= NODE_7_0_MODULE_VERSION
#define NAN_JSON_H_NEED_STRINGIFY 0
#else
#define NAN_JSON_H_NEED_STRINGIFY 1
#endif // NODE_MODULE_VERSION >= NODE_7_0_MODULE_VERSION
class JSON {
public:
JSON() {
#if NAN_JSON_H_NEED_PARSE + NAN_JSON_H_NEED_STRINGIFY
Nan::HandleScope scope;
Nan::MaybeLocal<v8::Value> maybe_global_json = Nan::Get(
Nan::GetCurrentContext()->Global(),
Nan::New("JSON").ToLocalChecked()
);
assert(!maybe_global_json.IsEmpty() && "global JSON is empty");
v8::Local<v8::Value> val_global_json = maybe_global_json.ToLocalChecked();
assert(val_global_json->IsObject() && "global JSON is not an object");
Nan::MaybeLocal<v8::Object> maybe_obj_global_json =
Nan::To<v8::Object>(val_global_json);
assert(!maybe_obj_global_json.IsEmpty() && "global JSON object is empty");
v8::Local<v8::Object> global_json = maybe_obj_global_json.ToLocalChecked();
#if NAN_JSON_H_NEED_PARSE
Nan::MaybeLocal<v8::Value> maybe_parse_method = Nan::Get(
global_json, Nan::New("parse").ToLocalChecked()
);
assert(!maybe_parse_method.IsEmpty() && "JSON.parse is empty");
v8::Local<v8::Value> parse_method = maybe_parse_method.ToLocalChecked();
assert(parse_method->IsFunction() && "JSON.parse is not a function");
parse_cb_.Reset(parse_method.As<v8::Function>());
#endif // NAN_JSON_H_NEED_PARSE
#if NAN_JSON_H_NEED_STRINGIFY
Nan::MaybeLocal<v8::Value> maybe_stringify_method = Nan::Get(
global_json, Nan::New("stringify").ToLocalChecked()
);
assert(!maybe_stringify_method.IsEmpty() && "JSON.stringify is empty");
v8::Local<v8::Value> stringify_method =
maybe_stringify_method.ToLocalChecked();
assert(
stringify_method->IsFunction() && "JSON.stringify is not a function"
);
stringify_cb_.Reset(stringify_method.As<v8::Function>());
#endif // NAN_JSON_H_NEED_STRINGIFY
#endif // NAN_JSON_H_NEED_PARSE + NAN_JSON_H_NEED_STRINGIFY
}
inline
Nan::MaybeLocal<v8::Value> Parse(v8::Local<v8::String> json_string) {
Nan::EscapableHandleScope scope;
#if NAN_JSON_H_NEED_PARSE
return scope.Escape(parse(json_string));
#else
Nan::MaybeLocal<v8::Value> result;
#if NODE_MODULE_VERSION >= NODE_0_12_MODULE_VERSION && \
NODE_MODULE_VERSION <= IOJS_2_0_MODULE_VERSION
result = v8::JSON::Parse(json_string);
#else
#if NODE_MODULE_VERSION > NODE_6_0_MODULE_VERSION
v8::Local<v8::Context> context_or_isolate = Nan::GetCurrentContext();
#else
v8::Isolate* context_or_isolate = v8::Isolate::GetCurrent();
#endif // NODE_MODULE_VERSION > NODE_6_0_MODULE_VERSION
result = v8::JSON::Parse(context_or_isolate, json_string);
#endif // NODE_MODULE_VERSION >= NODE_0_12_MODULE_VERSION &&
// NODE_MODULE_VERSION <= IOJS_2_0_MODULE_VERSION
if (result.IsEmpty()) return v8::Local<v8::Value>();
return scope.Escape(result.ToLocalChecked());
#endif // NAN_JSON_H_NEED_PARSE
}
inline
Nan::MaybeLocal<v8::String> Stringify(v8::Local<v8::Object> json_object) {
Nan::EscapableHandleScope scope;
Nan::MaybeLocal<v8::String> result =
#if NAN_JSON_H_NEED_STRINGIFY
Nan::To<v8::String>(stringify(json_object));
#else
v8::JSON::Stringify(Nan::GetCurrentContext(), json_object);
#endif // NAN_JSON_H_NEED_STRINGIFY
if (result.IsEmpty()) return v8::Local<v8::String>();
return scope.Escape(result.ToLocalChecked());
}
inline
Nan::MaybeLocal<v8::String> Stringify(v8::Local<v8::Object> json_object,
v8::Local<v8::String> gap) {
Nan::EscapableHandleScope scope;
Nan::MaybeLocal<v8::String> result =
#if NAN_JSON_H_NEED_STRINGIFY
Nan::To<v8::String>(stringify(json_object, gap));
#else
v8::JSON::Stringify(Nan::GetCurrentContext(), json_object, gap);
#endif // NAN_JSON_H_NEED_STRINGIFY
if (result.IsEmpty()) return v8::Local<v8::String>();
return scope.Escape(result.ToLocalChecked());
}
private:
NAN_DISALLOW_ASSIGN_COPY_MOVE(JSON)
#if NAN_JSON_H_NEED_PARSE
Nan::Callback parse_cb_;
#endif // NAN_JSON_H_NEED_PARSE
#if NAN_JSON_H_NEED_STRINGIFY
Nan::Callback stringify_cb_;
#endif // NAN_JSON_H_NEED_STRINGIFY
#if NAN_JSON_H_NEED_PARSE
inline v8::Local<v8::Value> parse(v8::Local<v8::Value> arg) {
assert(!parse_cb_.IsEmpty() && "parse_cb_ is empty");
AsyncResource resource("nan:JSON.parse");
return parse_cb_.Call(1, &arg, &resource).FromMaybe(v8::Local<v8::Value>());
}
#endif // NAN_JSON_H_NEED_PARSE
#if NAN_JSON_H_NEED_STRINGIFY
inline v8::Local<v8::Value> stringify(v8::Local<v8::Value> arg) {
assert(!stringify_cb_.IsEmpty() && "stringify_cb_ is empty");
AsyncResource resource("nan:JSON.stringify");
return stringify_cb_.Call(1, &arg, &resource)
.FromMaybe(v8::Local<v8::Value>());
}
inline v8::Local<v8::Value> stringify(v8::Local<v8::Value> arg,
v8::Local<v8::String> gap) {
assert(!stringify_cb_.IsEmpty() && "stringify_cb_ is empty");
v8::Local<v8::Value> argv[] = {
arg,
Nan::Null(),
gap
};
AsyncResource resource("nan:JSON.stringify");
return stringify_cb_.Call(3, argv, &resource)
.FromMaybe(v8::Local<v8::Value>());
}
#endif // NAN_JSON_H_NEED_STRINGIFY
};
#endif // NAN_JSON_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_MAYBE_43_INL_H_
#define NAN_MAYBE_43_INL_H_
template<typename T>
using MaybeLocal = v8::MaybeLocal<T>;
inline
MaybeLocal<v8::String> ToDetailString(v8::Local<v8::Value> val) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(val->ToDetailString(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::String>()));
}
inline
MaybeLocal<v8::Uint32> ToArrayIndex(v8::Local<v8::Value> val) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(val->ToArrayIndex(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::Uint32>()));
}
inline
Maybe<bool> Equals(v8::Local<v8::Value> a, v8::Local<v8::Value>(b)) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return a->Equals(isolate->GetCurrentContext(), b);
}
inline
MaybeLocal<v8::Object> NewInstance(v8::Local<v8::Function> h) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(h->NewInstance(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::Object>()));
}
inline
MaybeLocal<v8::Object> NewInstance(
v8::Local<v8::Function> h
, int argc
, v8::Local<v8::Value> argv[]) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(h->NewInstance(isolate->GetCurrentContext(), argc, argv)
.FromMaybe(v8::Local<v8::Object>()));
}
inline
MaybeLocal<v8::Object> NewInstance(v8::Local<v8::ObjectTemplate> h) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(h->NewInstance(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::Object>()));
}
inline MaybeLocal<v8::Function> GetFunction(
v8::Local<v8::FunctionTemplate> t) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(t->GetFunction(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::Function>()));
}
inline Maybe<bool> Set(
v8::Local<v8::Object> obj
, v8::Local<v8::Value> key
, v8::Local<v8::Value> value) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->Set(isolate->GetCurrentContext(), key, value);
}
inline Maybe<bool> Set(
v8::Local<v8::Object> obj
, uint32_t index
, v8::Local<v8::Value> value) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->Set(isolate->GetCurrentContext(), index, value);
}
#if NODE_MODULE_VERSION < NODE_4_0_MODULE_VERSION
#include "nan_define_own_property_helper.h" // NOLINT(build/include)
#endif
inline Maybe<bool> DefineOwnProperty(
v8::Local<v8::Object> obj
, v8::Local<v8::String> key
, v8::Local<v8::Value> value
, v8::PropertyAttribute attribs = v8::None) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
#if NODE_MODULE_VERSION >= NODE_4_0_MODULE_VERSION
return obj->DefineOwnProperty(isolate->GetCurrentContext(), key, value,
attribs);
#else
Maybe<v8::PropertyAttribute> maybeCurrent =
obj->GetPropertyAttributes(isolate->GetCurrentContext(), key);
if (maybeCurrent.IsNothing()) {
return Nothing<bool>();
}
v8::PropertyAttribute current = maybeCurrent.FromJust();
return imp::DefineOwnPropertyHelper(current, obj, key, value, attribs);
#endif
}
NAN_DEPRECATED inline Maybe<bool> ForceSet(
v8::Local<v8::Object> obj
, v8::Local<v8::Value> key
, v8::Local<v8::Value> value
, v8::PropertyAttribute attribs = v8::None) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
#if NODE_MODULE_VERSION >= NODE_9_0_MODULE_VERSION
return key->IsName()
? obj->DefineOwnProperty(isolate->GetCurrentContext(),
key.As<v8::Name>(), value, attribs)
: Nothing<bool>();
#else
return obj->ForceSet(isolate->GetCurrentContext(), key, value, attribs);
#endif
}
inline MaybeLocal<v8::Value> Get(
v8::Local<v8::Object> obj
, v8::Local<v8::Value> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(obj->Get(isolate->GetCurrentContext(), key)
.FromMaybe(v8::Local<v8::Value>()));
}
inline
MaybeLocal<v8::Value> Get(v8::Local<v8::Object> obj, uint32_t index) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(obj->Get(isolate->GetCurrentContext(), index)
.FromMaybe(v8::Local<v8::Value>()));
}
inline v8::PropertyAttribute GetPropertyAttributes(
v8::Local<v8::Object> obj
, v8::Local<v8::Value> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->GetPropertyAttributes(isolate->GetCurrentContext(), key)
.FromJust();
}
inline Maybe<bool> Has(
v8::Local<v8::Object> obj
, v8::Local<v8::String> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->Has(isolate->GetCurrentContext(), key);
}
inline Maybe<bool> Has(v8::Local<v8::Object> obj, uint32_t index) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->Has(isolate->GetCurrentContext(), index);
}
inline Maybe<bool> Delete(
v8::Local<v8::Object> obj
, v8::Local<v8::String> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->Delete(isolate->GetCurrentContext(), key);
}
inline
Maybe<bool> Delete(v8::Local<v8::Object> obj, uint32_t index) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->Delete(isolate->GetCurrentContext(), index);
}
inline
MaybeLocal<v8::Array> GetPropertyNames(v8::Local<v8::Object> obj) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(obj->GetPropertyNames(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::Array>()));
}
inline
MaybeLocal<v8::Array> GetOwnPropertyNames(v8::Local<v8::Object> obj) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(obj->GetOwnPropertyNames(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::Array>()));
}
inline Maybe<bool> SetPrototype(
v8::Local<v8::Object> obj
, v8::Local<v8::Value> prototype) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->SetPrototype(isolate->GetCurrentContext(), prototype);
}
inline MaybeLocal<v8::String> ObjectProtoToString(
v8::Local<v8::Object> obj) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(obj->ObjectProtoToString(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::String>()));
}
inline Maybe<bool> HasOwnProperty(
v8::Local<v8::Object> obj
, v8::Local<v8::String> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->HasOwnProperty(isolate->GetCurrentContext(), key);
}
inline Maybe<bool> HasRealNamedProperty(
v8::Local<v8::Object> obj
, v8::Local<v8::String> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->HasRealNamedProperty(isolate->GetCurrentContext(), key);
}
inline Maybe<bool> HasRealIndexedProperty(
v8::Local<v8::Object> obj
, uint32_t index) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->HasRealIndexedProperty(isolate->GetCurrentContext(), index);
}
inline Maybe<bool> HasRealNamedCallbackProperty(
v8::Local<v8::Object> obj
, v8::Local<v8::String> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return obj->HasRealNamedCallbackProperty(isolate->GetCurrentContext(), key);
}
inline MaybeLocal<v8::Value> GetRealNamedPropertyInPrototypeChain(
v8::Local<v8::Object> obj
, v8::Local<v8::String> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(obj->GetRealNamedPropertyInPrototypeChain(
isolate->GetCurrentContext(), key)
.FromMaybe(v8::Local<v8::Value>()));
}
inline MaybeLocal<v8::Value> GetRealNamedProperty(
v8::Local<v8::Object> obj
, v8::Local<v8::String> key) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(
obj->GetRealNamedProperty(isolate->GetCurrentContext(), key)
.FromMaybe(v8::Local<v8::Value>()));
}
inline MaybeLocal<v8::Value> CallAsFunction(
v8::Local<v8::Object> obj
, v8::Local<v8::Object> recv
, int argc
, v8::Local<v8::Value> argv[]) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(
obj->CallAsFunction(isolate->GetCurrentContext(), recv, argc, argv)
.FromMaybe(v8::Local<v8::Value>()));
}
inline MaybeLocal<v8::Value> CallAsConstructor(
v8::Local<v8::Object> obj
, int argc, v8::Local<v8::Value> argv[]) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(
obj->CallAsConstructor(isolate->GetCurrentContext(), argc, argv)
.FromMaybe(v8::Local<v8::Value>()));
}
inline
MaybeLocal<v8::String> GetSourceLine(v8::Local<v8::Message> msg) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(msg->GetSourceLine(isolate->GetCurrentContext())
.FromMaybe(v8::Local<v8::String>()));
}
inline Maybe<int> GetLineNumber(v8::Local<v8::Message> msg) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return msg->GetLineNumber(isolate->GetCurrentContext());
}
inline Maybe<int> GetStartColumn(v8::Local<v8::Message> msg) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return msg->GetStartColumn(isolate->GetCurrentContext());
}
inline Maybe<int> GetEndColumn(v8::Local<v8::Message> msg) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
return msg->GetEndColumn(isolate->GetCurrentContext());
}
inline MaybeLocal<v8::Object> CloneElementAt(
v8::Local<v8::Array> array
, uint32_t index) {
#if (NODE_MODULE_VERSION >= NODE_6_0_MODULE_VERSION)
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
v8::Local<v8::Context> context = isolate->GetCurrentContext();
v8::Local<v8::Value> elem;
v8::Local<v8::Object> obj;
if (!array->Get(context, index).ToLocal(&elem)) {
return scope.Escape(obj);
}
if (!elem->ToObject(context).ToLocal(&obj)) {
return scope.Escape(v8::Local<v8::Object>());
}
return scope.Escape(obj->Clone());
#else
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(array->CloneElementAt(isolate->GetCurrentContext(), index)
.FromMaybe(v8::Local<v8::Object>()));
#endif
}
inline MaybeLocal<v8::Value> Call(
v8::Local<v8::Function> fun
, v8::Local<v8::Object> recv
, int argc
, v8::Local<v8::Value> argv[]) {
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
return scope.Escape(fun->Call(isolate->GetCurrentContext(), recv, argc, argv)
.FromMaybe(v8::Local<v8::Value>()));
}
#endif // NAN_MAYBE_43_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_MAYBE_PRE_43_INL_H_
#define NAN_MAYBE_PRE_43_INL_H_
template<typename T>
class MaybeLocal {
public:
inline MaybeLocal() : val_(v8::Local<T>()) {}
template<typename S>
# if NODE_MODULE_VERSION >= NODE_0_12_MODULE_VERSION
inline
MaybeLocal(v8::Local<S> that) : val_(that) {} // NOLINT(runtime/explicit)
# else
inline
MaybeLocal(v8::Local<S> that) : // NOLINT(runtime/explicit)
val_(*reinterpret_cast<v8::Local<T>*>(&that)) {}
# endif
inline bool IsEmpty() const { return val_.IsEmpty(); }
template<typename S>
inline bool ToLocal(v8::Local<S> *out) const {
*out = val_;
return !IsEmpty();
}
inline v8::Local<T> ToLocalChecked() const {
#if defined(V8_ENABLE_CHECKS)
assert(!IsEmpty() && "ToLocalChecked is Empty");
#endif // V8_ENABLE_CHECKS
return val_;
}
template<typename S>
inline v8::Local<S> FromMaybe(v8::Local<S> default_value) const {
return IsEmpty() ? default_value : v8::Local<S>(val_);
}
private:
v8::Local<T> val_;
};
inline
MaybeLocal<v8::String> ToDetailString(v8::Handle<v8::Value> val) {
return MaybeLocal<v8::String>(val->ToDetailString());
}
inline
MaybeLocal<v8::Uint32> ToArrayIndex(v8::Handle<v8::Value> val) {
return MaybeLocal<v8::Uint32>(val->ToArrayIndex());
}
inline
Maybe<bool> Equals(v8::Handle<v8::Value> a, v8::Handle<v8::Value>(b)) {
return Just<bool>(a->Equals(b));
}
inline
MaybeLocal<v8::Object> NewInstance(v8::Handle<v8::Function> h) {
return MaybeLocal<v8::Object>(h->NewInstance());
}
inline
MaybeLocal<v8::Object> NewInstance(
v8::Local<v8::Function> h
, int argc
, v8::Local<v8::Value> argv[]) {
return MaybeLocal<v8::Object>(h->NewInstance(argc, argv));
}
inline
MaybeLocal<v8::Object> NewInstance(v8::Handle<v8::ObjectTemplate> h) {
return MaybeLocal<v8::Object>(h->NewInstance());
}
inline
MaybeLocal<v8::Function> GetFunction(v8::Handle<v8::FunctionTemplate> t) {
return MaybeLocal<v8::Function>(t->GetFunction());
}
inline Maybe<bool> Set(
v8::Handle<v8::Object> obj
, v8::Handle<v8::Value> key
, v8::Handle<v8::Value> value) {
return Just<bool>(obj->Set(key, value));
}
inline Maybe<bool> Set(
v8::Handle<v8::Object> obj
, uint32_t index
, v8::Handle<v8::Value> value) {
return Just<bool>(obj->Set(index, value));
}
#include "nan_define_own_property_helper.h" // NOLINT(build/include)
inline Maybe<bool> DefineOwnProperty(
v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key
, v8::Handle<v8::Value> value
, v8::PropertyAttribute attribs = v8::None) {
v8::PropertyAttribute current = obj->GetPropertyAttributes(key);
return imp::DefineOwnPropertyHelper(current, obj, key, value, attribs);
}
NAN_DEPRECATED inline Maybe<bool> ForceSet(
v8::Handle<v8::Object> obj
, v8::Handle<v8::Value> key
, v8::Handle<v8::Value> value
, v8::PropertyAttribute attribs = v8::None) {
return Just<bool>(obj->ForceSet(key, value, attribs));
}
inline MaybeLocal<v8::Value> Get(
v8::Handle<v8::Object> obj
, v8::Handle<v8::Value> key) {
return MaybeLocal<v8::Value>(obj->Get(key));
}
inline MaybeLocal<v8::Value> Get(
v8::Handle<v8::Object> obj
, uint32_t index) {
return MaybeLocal<v8::Value>(obj->Get(index));
}
inline Maybe<v8::PropertyAttribute> GetPropertyAttributes(
v8::Handle<v8::Object> obj
, v8::Handle<v8::Value> key) {
return Just<v8::PropertyAttribute>(obj->GetPropertyAttributes(key));
}
inline Maybe<bool> Has(
v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key) {
return Just<bool>(obj->Has(key));
}
inline Maybe<bool> Has(
v8::Handle<v8::Object> obj
, uint32_t index) {
return Just<bool>(obj->Has(index));
}
inline Maybe<bool> Delete(
v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key) {
return Just<bool>(obj->Delete(key));
}
inline Maybe<bool> Delete(
v8::Handle<v8::Object> obj
, uint32_t index) {
return Just<bool>(obj->Delete(index));
}
inline
MaybeLocal<v8::Array> GetPropertyNames(v8::Handle<v8::Object> obj) {
return MaybeLocal<v8::Array>(obj->GetPropertyNames());
}
inline
MaybeLocal<v8::Array> GetOwnPropertyNames(v8::Handle<v8::Object> obj) {
return MaybeLocal<v8::Array>(obj->GetOwnPropertyNames());
}
inline Maybe<bool> SetPrototype(
v8::Handle<v8::Object> obj
, v8::Handle<v8::Value> prototype) {
return Just<bool>(obj->SetPrototype(prototype));
}
inline MaybeLocal<v8::String> ObjectProtoToString(
v8::Handle<v8::Object> obj) {
return MaybeLocal<v8::String>(obj->ObjectProtoToString());
}
inline Maybe<bool> HasOwnProperty(
v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key) {
return Just<bool>(obj->HasOwnProperty(key));
}
inline Maybe<bool> HasRealNamedProperty(
v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key) {
return Just<bool>(obj->HasRealNamedProperty(key));
}
inline Maybe<bool> HasRealIndexedProperty(
v8::Handle<v8::Object> obj
, uint32_t index) {
return Just<bool>(obj->HasRealIndexedProperty(index));
}
inline Maybe<bool> HasRealNamedCallbackProperty(
v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key) {
return Just<bool>(obj->HasRealNamedCallbackProperty(key));
}
inline MaybeLocal<v8::Value> GetRealNamedPropertyInPrototypeChain(
v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key) {
return MaybeLocal<v8::Value>(
obj->GetRealNamedPropertyInPrototypeChain(key));
}
inline MaybeLocal<v8::Value> GetRealNamedProperty(
v8::Handle<v8::Object> obj
, v8::Handle<v8::String> key) {
return MaybeLocal<v8::Value>(obj->GetRealNamedProperty(key));
}
inline MaybeLocal<v8::Value> CallAsFunction(
v8::Handle<v8::Object> obj
, v8::Handle<v8::Object> recv
, int argc
, v8::Handle<v8::Value> argv[]) {
return MaybeLocal<v8::Value>(obj->CallAsFunction(recv, argc, argv));
}
inline MaybeLocal<v8::Value> CallAsConstructor(
v8::Handle<v8::Object> obj
, int argc
, v8::Local<v8::Value> argv[]) {
return MaybeLocal<v8::Value>(obj->CallAsConstructor(argc, argv));
}
inline
MaybeLocal<v8::String> GetSourceLine(v8::Handle<v8::Message> msg) {
return MaybeLocal<v8::String>(msg->GetSourceLine());
}
inline Maybe<int> GetLineNumber(v8::Handle<v8::Message> msg) {
return Just<int>(msg->GetLineNumber());
}
inline Maybe<int> GetStartColumn(v8::Handle<v8::Message> msg) {
return Just<int>(msg->GetStartColumn());
}
inline Maybe<int> GetEndColumn(v8::Handle<v8::Message> msg) {
return Just<int>(msg->GetEndColumn());
}
inline MaybeLocal<v8::Object> CloneElementAt(
v8::Handle<v8::Array> array
, uint32_t index) {
return MaybeLocal<v8::Object>(array->CloneElementAt(index));
}
inline MaybeLocal<v8::Value> Call(
v8::Local<v8::Function> fun
, v8::Local<v8::Object> recv
, int argc
, v8::Local<v8::Value> argv[]) {
return MaybeLocal<v8::Value>(fun->Call(recv, argc, argv));
}
#endif // NAN_MAYBE_PRE_43_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_NEW_H_
#define NAN_NEW_H_
namespace imp { // scnr
// TODO(agnat): Generalize
template <typename T> v8::Local<T> To(v8::Local<v8::Integer> i);
template <>
inline
v8::Local<v8::Integer>
To<v8::Integer>(v8::Local<v8::Integer> i) {
return Nan::To<v8::Integer>(i).ToLocalChecked();
}
template <>
inline
v8::Local<v8::Int32>
To<v8::Int32>(v8::Local<v8::Integer> i) {
return Nan::To<v8::Int32>(i).ToLocalChecked();
}
template <>
inline
v8::Local<v8::Uint32>
To<v8::Uint32>(v8::Local<v8::Integer> i) {
return Nan::To<v8::Uint32>(i).ToLocalChecked();
}
template <typename T> struct FactoryBase {
typedef v8::Local<T> return_t;
};
template <typename T> struct MaybeFactoryBase {
typedef MaybeLocal<T> return_t;
};
template <typename T> struct Factory;
template <>
struct Factory<v8::Array> : FactoryBase<v8::Array> {
static inline return_t New();
static inline return_t New(int length);
};
template <>
struct Factory<v8::Boolean> : FactoryBase<v8::Boolean> {
static inline return_t New(bool value);
};
template <>
struct Factory<v8::BooleanObject> : FactoryBase<v8::BooleanObject> {
static inline return_t New(bool value);
};
template <>
struct Factory<v8::Context> : FactoryBase<v8::Context> {
static inline
return_t
New( v8::ExtensionConfiguration* extensions = NULL
, v8::Local<v8::ObjectTemplate> tmpl = v8::Local<v8::ObjectTemplate>()
, v8::Local<v8::Value> obj = v8::Local<v8::Value>());
};
template <>
struct Factory<v8::Date> : MaybeFactoryBase<v8::Date> {
static inline return_t New(double value);
};
template <>
struct Factory<v8::External> : FactoryBase<v8::External> {
static inline return_t New(void *value);
};
template <>
struct Factory<v8::Function> : FactoryBase<v8::Function> {
static inline
return_t
New( FunctionCallback callback
, v8::Local<v8::Value> data = v8::Local<v8::Value>());
};
template <>
struct Factory<v8::FunctionTemplate> : FactoryBase<v8::FunctionTemplate> {
static inline
return_t
New( FunctionCallback callback = NULL
, v8::Local<v8::Value> data = v8::Local<v8::Value>()
, v8::Local<v8::Signature> signature = v8::Local<v8::Signature>());
};
template <>
struct Factory<v8::Number> : FactoryBase<v8::Number> {
static inline return_t New(double value);
};
template <>
struct Factory<v8::NumberObject> : FactoryBase<v8::NumberObject> {
static inline return_t New(double value);
};
template <typename T>
struct IntegerFactory : FactoryBase<T> {
typedef typename FactoryBase<T>::return_t return_t;
static inline return_t New(int32_t value);
static inline return_t New(uint32_t value);
};
template <>
struct Factory<v8::Integer> : IntegerFactory<v8::Integer> {};
template <>
struct Factory<v8::Int32> : IntegerFactory<v8::Int32> {};
template <>
struct Factory<v8::Uint32> : FactoryBase<v8::Uint32> {
static inline return_t New(int32_t value);
static inline return_t New(uint32_t value);
};
template <>
struct Factory<v8::Object> : FactoryBase<v8::Object> {
static inline return_t New();
};
template <>
struct Factory<v8::ObjectTemplate> : FactoryBase<v8::ObjectTemplate> {
static inline return_t New();
};
template <>
struct Factory<v8::RegExp> : MaybeFactoryBase<v8::RegExp> {
static inline return_t New(
v8::Local<v8::String> pattern, v8::RegExp::Flags flags);
};
template <>
struct Factory<v8::Script> : MaybeFactoryBase<v8::Script> {
static inline return_t New( v8::Local<v8::String> source);
static inline return_t New( v8::Local<v8::String> source
, v8::ScriptOrigin const& origin);
};
template <>
struct Factory<v8::Signature> : FactoryBase<v8::Signature> {
typedef v8::Local<v8::FunctionTemplate> FTH;
static inline return_t New(FTH receiver = FTH());
};
template <>
struct Factory<v8::String> : MaybeFactoryBase<v8::String> {
static inline return_t New();
static inline return_t New(const char *value, int length = -1);
static inline return_t New(const uint16_t *value, int length = -1);
static inline return_t New(std::string const& value);
static inline return_t New(v8::String::ExternalStringResource * value);
static inline return_t New(ExternalOneByteStringResource * value);
};
template <>
struct Factory<v8::StringObject> : FactoryBase<v8::StringObject> {
static inline return_t New(v8::Local<v8::String> value);
};
} // end of namespace imp
#if (NODE_MODULE_VERSION >= 12)
namespace imp {
template <>
struct Factory<v8::UnboundScript> : MaybeFactoryBase<v8::UnboundScript> {
static inline return_t New( v8::Local<v8::String> source);
static inline return_t New( v8::Local<v8::String> source
, v8::ScriptOrigin const& origin);
};
} // end of namespace imp
# include "nan_implementation_12_inl.h"
#else // NODE_MODULE_VERSION >= 12
# include "nan_implementation_pre_12_inl.h"
#endif
//=== API ======================================================================
template <typename T>
typename imp::Factory<T>::return_t
New() {
return imp::Factory<T>::New();
}
template <typename T, typename A0>
typename imp::Factory<T>::return_t
New(A0 arg0) {
return imp::Factory<T>::New(arg0);
}
template <typename T, typename A0, typename A1>
typename imp::Factory<T>::return_t
New(A0 arg0, A1 arg1) {
return imp::Factory<T>::New(arg0, arg1);
}
template <typename T, typename A0, typename A1, typename A2>
typename imp::Factory<T>::return_t
New(A0 arg0, A1 arg1, A2 arg2) {
return imp::Factory<T>::New(arg0, arg1, arg2);
}
template <typename T, typename A0, typename A1, typename A2, typename A3>
typename imp::Factory<T>::return_t
New(A0 arg0, A1 arg1, A2 arg2, A3 arg3) {
return imp::Factory<T>::New(arg0, arg1, arg2, arg3);
}
// Note(agnat): When passing overloaded function pointers to template functions
// as generic arguments the compiler needs help in picking the right overload.
// These two functions handle New<Function> and New<FunctionTemplate> with
// all argument variations.
// v8::Function and v8::FunctionTemplate with one or two arguments
template <typename T>
typename imp::Factory<T>::return_t
New( FunctionCallback callback
, v8::Local<v8::Value> data = v8::Local<v8::Value>()) {
return imp::Factory<T>::New(callback, data);
}
// v8::Function and v8::FunctionTemplate with three arguments
template <typename T, typename A2>
typename imp::Factory<T>::return_t
New( FunctionCallback callback
, v8::Local<v8::Value> data = v8::Local<v8::Value>()
, A2 a2 = A2()) {
return imp::Factory<T>::New(callback, data, a2);
}
// Convenience
#if NODE_MODULE_VERSION < IOJS_3_0_MODULE_VERSION
template <typename T> inline v8::Local<T> New(v8::Handle<T> h);
#endif
#if NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION
template <typename T, typename M>
inline v8::Local<T> New(v8::Persistent<T, M> const& p);
#else
template <typename T> inline v8::Local<T> New(v8::Persistent<T> const& p);
#endif
template <typename T, typename M>
inline v8::Local<T> New(Persistent<T, M> const& p);
template <typename T>
inline v8::Local<T> New(Global<T> const& p);
inline
imp::Factory<v8::Boolean>::return_t
New(bool value) {
return New<v8::Boolean>(value);
}
inline
imp::Factory<v8::Int32>::return_t
New(int32_t value) {
return New<v8::Int32>(value);
}
inline
imp::Factory<v8::Uint32>::return_t
New(uint32_t value) {
return New<v8::Uint32>(value);
}
inline
imp::Factory<v8::Number>::return_t
New(double value) {
return New<v8::Number>(value);
}
inline
imp::Factory<v8::String>::return_t
New(std::string const& value) { // NOLINT(build/include_what_you_use)
return New<v8::String>(value);
}
inline
imp::Factory<v8::String>::return_t
New(const char * value, int length) {
return New<v8::String>(value, length);
}
inline
imp::Factory<v8::String>::return_t
New(const uint16_t * value, int length) {
return New<v8::String>(value, length);
}
inline
imp::Factory<v8::String>::return_t
New(const char * value) {
return New<v8::String>(value);
}
inline
imp::Factory<v8::String>::return_t
New(const uint16_t * value) {
return New<v8::String>(value);
}
inline
imp::Factory<v8::String>::return_t
New(v8::String::ExternalStringResource * value) {
return New<v8::String>(value);
}
inline
imp::Factory<v8::String>::return_t
New(ExternalOneByteStringResource * value) {
return New<v8::String>(value);
}
inline
imp::Factory<v8::RegExp>::return_t
New(v8::Local<v8::String> pattern, v8::RegExp::Flags flags) {
return New<v8::RegExp>(pattern, flags);
}
#endif // NAN_NEW_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_OBJECT_WRAP_H_
#define NAN_OBJECT_WRAP_H_
class ObjectWrap {
public:
ObjectWrap() {
refs_ = 0;
}
virtual ~ObjectWrap() {
if (persistent().IsEmpty()) {
return;
}
persistent().ClearWeak();
persistent().Reset();
}
template <class T>
static inline T* Unwrap(v8::Local<v8::Object> object) {
assert(!object.IsEmpty());
assert(object->InternalFieldCount() > 0);
// Cast to ObjectWrap before casting to T. A direct cast from void
// to T won't work right when T has more than one base class.
void* ptr = GetInternalFieldPointer(object, 0);
ObjectWrap* wrap = static_cast<ObjectWrap*>(ptr);
return static_cast<T*>(wrap);
}
inline v8::Local<v8::Object> handle() const {
return New(handle_);
}
inline Persistent<v8::Object>& persistent() {
return handle_;
}
protected:
inline void Wrap(v8::Local<v8::Object> object) {
assert(persistent().IsEmpty());
assert(object->InternalFieldCount() > 0);
SetInternalFieldPointer(object, 0, this);
persistent().Reset(object);
MakeWeak();
}
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
inline void MakeWeak() {
persistent().v8::PersistentBase<v8::Object>::SetWeak(
this, WeakCallback, v8::WeakCallbackType::kParameter);
#if NODE_MAJOR_VERSION < 10
// FIXME(bnoordhuis) Probably superfluous in older Node.js versions too.
persistent().MarkIndependent();
#endif
}
#elif NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION
inline void MakeWeak() {
persistent().v8::PersistentBase<v8::Object>::SetWeak(this, WeakCallback);
persistent().MarkIndependent();
}
#else
inline void MakeWeak() {
persistent().persistent.MakeWeak(this, WeakCallback);
persistent().MarkIndependent();
}
#endif
/* Ref() marks the object as being attached to an event loop.
* Refed objects will not be garbage collected, even if
* all references are lost.
*/
virtual void Ref() {
assert(!persistent().IsEmpty());
persistent().ClearWeak();
refs_++;
}
/* Unref() marks an object as detached from the event loop. This is its
* default state. When an object with a "weak" reference changes from
* attached to detached state it will be freed. Be careful not to access
* the object after making this call as it might be gone!
* (A "weak reference" means an object that only has a
* persistent handle.)
*
* DO NOT CALL THIS FROM DESTRUCTOR
*/
virtual void Unref() {
assert(!persistent().IsEmpty());
assert(!persistent().IsWeak());
assert(refs_ > 0);
if (--refs_ == 0)
MakeWeak();
}
int refs_; // ro
private:
NAN_DISALLOW_ASSIGN_COPY_MOVE(ObjectWrap)
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
static void
WeakCallback(v8::WeakCallbackInfo<ObjectWrap> const& info) {
ObjectWrap* wrap = info.GetParameter();
assert(wrap->refs_ == 0);
wrap->handle_.Reset();
delete wrap;
}
#elif NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION
static void
WeakCallback(v8::WeakCallbackData<v8::Object, ObjectWrap> const& data) {
ObjectWrap* wrap = data.GetParameter();
assert(wrap->refs_ == 0);
assert(wrap->handle_.IsNearDeath());
wrap->handle_.Reset();
delete wrap;
}
#else
static void WeakCallback(v8::Persistent<v8::Value> value, void *data) {
ObjectWrap *wrap = static_cast<ObjectWrap*>(data);
assert(wrap->refs_ == 0);
assert(wrap->handle_.IsNearDeath());
wrap->handle_.Reset();
delete wrap;
}
#endif
Persistent<v8::Object> handle_;
};
#endif // NAN_OBJECT_WRAP_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_PERSISTENT_12_INL_H_
#define NAN_PERSISTENT_12_INL_H_
template<typename T, typename M> class Persistent :
public v8::Persistent<T, M> {
public:
inline Persistent() : v8::Persistent<T, M>() {}
template<typename S> inline Persistent(v8::Local<S> that) :
v8::Persistent<T, M>(v8::Isolate::GetCurrent(), that) {}
template<typename S, typename M2>
inline
Persistent(const v8::Persistent<S, M2> &that) : // NOLINT(runtime/explicit)
v8::Persistent<T, M2>(v8::Isolate::GetCurrent(), that) {}
inline void Reset() { v8::PersistentBase<T>::Reset(); }
template <typename S>
inline void Reset(const v8::Local<S> &other) {
v8::PersistentBase<T>::Reset(v8::Isolate::GetCurrent(), other);
}
template <typename S>
inline void Reset(const v8::PersistentBase<S> &other) {
v8::PersistentBase<T>::Reset(v8::Isolate::GetCurrent(), other);
}
template<typename P>
inline void SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type);
private:
inline T *operator*() const { return *PersistentBase<T>::persistent; }
template<typename S, typename M2>
inline void Copy(const Persistent<S, M2> &that) {
TYPE_CHECK(T, S);
this->Reset();
if (!that.IsEmpty()) {
this->Reset(that);
M::Copy(that, this);
}
}
};
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
template<typename T>
class Global : public v8::Global<T> {
public:
inline Global() : v8::Global<T>() {}
template<typename S> inline Global(v8::Local<S> that) :
v8::Global<T>(v8::Isolate::GetCurrent(), that) {}
template<typename S>
inline
Global(const v8::PersistentBase<S> &that) : // NOLINT(runtime/explicit)
v8::Global<S>(v8::Isolate::GetCurrent(), that) {}
inline void Reset() { v8::PersistentBase<T>::Reset(); }
template <typename S>
inline void Reset(const v8::Local<S> &other) {
v8::PersistentBase<T>::Reset(v8::Isolate::GetCurrent(), other);
}
template <typename S>
inline void Reset(const v8::PersistentBase<S> &other) {
v8::PersistentBase<T>::Reset(v8::Isolate::GetCurrent(), other);
}
template<typename P>
inline void SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type) {
reinterpret_cast<Persistent<T>*>(this)->SetWeak(
parameter, callback, type);
}
};
#else
template<typename T>
class Global : public v8::UniquePersistent<T> {
public:
inline Global() : v8::UniquePersistent<T>() {}
template<typename S> inline Global(v8::Local<S> that) :
v8::UniquePersistent<T>(v8::Isolate::GetCurrent(), that) {}
template<typename S>
inline
Global(const v8::PersistentBase<S> &that) : // NOLINT(runtime/explicit)
v8::UniquePersistent<S>(v8::Isolate::GetCurrent(), that) {}
inline void Reset() { v8::PersistentBase<T>::Reset(); }
template <typename S>
inline void Reset(const v8::Local<S> &other) {
v8::PersistentBase<T>::Reset(v8::Isolate::GetCurrent(), other);
}
template <typename S>
inline void Reset(const v8::PersistentBase<S> &other) {
v8::PersistentBase<T>::Reset(v8::Isolate::GetCurrent(), other);
}
template<typename P>
inline void SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type) {
reinterpret_cast<Persistent<T>*>(this)->SetWeak(
parameter, callback, type);
}
};
#endif
#endif // NAN_PERSISTENT_12_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_PERSISTENT_PRE_12_INL_H_
#define NAN_PERSISTENT_PRE_12_INL_H_
template<typename T>
class PersistentBase {
v8::Persistent<T> persistent;
template<typename U>
friend v8::Local<U> New(const PersistentBase<U> &p);
template<typename U, typename M>
friend v8::Local<U> New(const Persistent<U, M> &p);
template<typename U>
friend v8::Local<U> New(const Global<U> &p);
template<typename S> friend class ReturnValue;
public:
inline PersistentBase() :
persistent() {}
inline void Reset() {
persistent.Dispose();
persistent.Clear();
}
template<typename S>
inline void Reset(const v8::Local<S> &other) {
TYPE_CHECK(T, S);
if (!persistent.IsEmpty()) {
persistent.Dispose();
}
if (other.IsEmpty()) {
persistent.Clear();
} else {
persistent = v8::Persistent<T>::New(other);
}
}
template<typename S>
inline void Reset(const PersistentBase<S> &other) {
TYPE_CHECK(T, S);
if (!persistent.IsEmpty()) {
persistent.Dispose();
}
if (other.IsEmpty()) {
persistent.Clear();
} else {
persistent = v8::Persistent<T>::New(other.persistent);
}
}
inline bool IsEmpty() const { return persistent.IsEmpty(); }
inline void Empty() { persistent.Clear(); }
template<typename S>
inline bool operator==(const PersistentBase<S> &that) const {
return this->persistent == that.persistent;
}
template<typename S>
inline bool operator==(const v8::Local<S> &that) const {
return this->persistent == that;
}
template<typename S>
inline bool operator!=(const PersistentBase<S> &that) const {
return !operator==(that);
}
template<typename S>
inline bool operator!=(const v8::Local<S> &that) const {
return !operator==(that);
}
template<typename P>
inline void SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type);
inline void ClearWeak() { persistent.ClearWeak(); }
inline void MarkIndependent() { persistent.MarkIndependent(); }
inline bool IsIndependent() const { return persistent.IsIndependent(); }
inline bool IsNearDeath() const { return persistent.IsNearDeath(); }
inline bool IsWeak() const { return persistent.IsWeak(); }
private:
inline explicit PersistentBase(v8::Persistent<T> that) :
persistent(that) { }
inline explicit PersistentBase(T *val) : persistent(val) {}
template<typename S, typename M> friend class Persistent;
template<typename S> friend class Global;
friend class ObjectWrap;
};
template<typename T>
class NonCopyablePersistentTraits {
public:
typedef Persistent<T, NonCopyablePersistentTraits<T> >
NonCopyablePersistent;
static const bool kResetInDestructor = false;
template<typename S, typename M>
inline static void Copy(const Persistent<S, M> &source,
NonCopyablePersistent *dest) {
Uncompilable<v8::Object>();
}
template<typename O> inline static void Uncompilable() {
TYPE_CHECK(O, v8::Primitive);
}
};
template<typename T>
struct CopyablePersistentTraits {
typedef Persistent<T, CopyablePersistentTraits<T> > CopyablePersistent;
static const bool kResetInDestructor = true;
template<typename S, typename M>
static inline void Copy(const Persistent<S, M> &source,
CopyablePersistent *dest) {}
};
template<typename T, typename M> class Persistent :
public PersistentBase<T> {
public:
inline Persistent() {}
template<typename S> inline Persistent(v8::Handle<S> that)
: PersistentBase<T>(v8::Persistent<T>::New(that)) {
TYPE_CHECK(T, S);
}
inline Persistent(const Persistent &that) : PersistentBase<T>() {
Copy(that);
}
template<typename S, typename M2>
inline Persistent(const Persistent<S, M2> &that) :
PersistentBase<T>() {
Copy(that);
}
inline Persistent &operator=(const Persistent &that) {
Copy(that);
return *this;
}
template <class S, class M2>
inline Persistent &operator=(const Persistent<S, M2> &that) {
Copy(that);
return *this;
}
inline ~Persistent() {
if (M::kResetInDestructor) this->Reset();
}
private:
inline T *operator*() const { return *PersistentBase<T>::persistent; }
template<typename S, typename M2>
inline void Copy(const Persistent<S, M2> &that) {
TYPE_CHECK(T, S);
this->Reset();
if (!that.IsEmpty()) {
this->persistent = v8::Persistent<T>::New(that.persistent);
M::Copy(that, this);
}
}
};
template<typename T>
class Global : public PersistentBase<T> {
struct RValue {
inline explicit RValue(Global* obj) : object(obj) {}
Global* object;
};
public:
inline Global() : PersistentBase<T>(0) { }
template <typename S>
inline Global(v8::Local<S> that) // NOLINT(runtime/explicit)
: PersistentBase<T>(v8::Persistent<T>::New(that)) {
TYPE_CHECK(T, S);
}
template <typename S>
inline Global(const PersistentBase<S> &that) // NOLINT(runtime/explicit)
: PersistentBase<T>(that) {
TYPE_CHECK(T, S);
}
/**
* Move constructor.
*/
inline Global(RValue rvalue) // NOLINT(runtime/explicit)
: PersistentBase<T>(rvalue.object->persistent) {
rvalue.object->Reset();
}
inline ~Global() { this->Reset(); }
/**
* Move via assignment.
*/
template<typename S>
inline Global &operator=(Global<S> rhs) {
TYPE_CHECK(T, S);
this->Reset(rhs.persistent);
rhs.Reset();
return *this;
}
/**
* Cast operator for moves.
*/
inline operator RValue() { return RValue(this); }
/**
* Pass allows returning uniques from functions, etc.
*/
Global Pass() { return Global(RValue(this)); }
private:
Global(Global &);
void operator=(Global &);
template<typename S> friend class ReturnValue;
};
#endif // NAN_PERSISTENT_PRE_12_INL_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_PRIVATE_H_
#define NAN_PRIVATE_H_
inline Maybe<bool>
HasPrivate(v8::Local<v8::Object> object, v8::Local<v8::String> key) {
HandleScope scope;
#if NODE_MODULE_VERSION >= NODE_6_0_MODULE_VERSION
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::Local<v8::Context> context = isolate->GetCurrentContext();
v8::Local<v8::Private> private_key = v8::Private::ForApi(isolate, key);
return object->HasPrivate(context, private_key);
#else
return Just(!object->GetHiddenValue(key).IsEmpty());
#endif
}
inline MaybeLocal<v8::Value>
GetPrivate(v8::Local<v8::Object> object, v8::Local<v8::String> key) {
#if NODE_MODULE_VERSION >= NODE_6_0_MODULE_VERSION
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope scope(isolate);
v8::Local<v8::Context> context = isolate->GetCurrentContext();
v8::Local<v8::Private> private_key = v8::Private::ForApi(isolate, key);
v8::MaybeLocal<v8::Value> v = object->GetPrivate(context, private_key);
return scope.Escape(v.ToLocalChecked());
#else
EscapableHandleScope scope;
v8::Local<v8::Value> v = object->GetHiddenValue(key);
if (v.IsEmpty()) {
v = Undefined();
}
return scope.Escape(v);
#endif
}
inline Maybe<bool> SetPrivate(
v8::Local<v8::Object> object,
v8::Local<v8::String> key,
v8::Local<v8::Value> value) {
#if NODE_MODULE_VERSION >= NODE_6_0_MODULE_VERSION
HandleScope scope;
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::Local<v8::Context> context = isolate->GetCurrentContext();
v8::Local<v8::Private> private_key = v8::Private::ForApi(isolate, key);
return object->SetPrivate(context, private_key, value);
#else
return Just(object->SetHiddenValue(key, value));
#endif
}
inline Maybe<bool> DeletePrivate(
v8::Local<v8::Object> object,
v8::Local<v8::String> key) {
#if NODE_MODULE_VERSION >= NODE_6_0_MODULE_VERSION
HandleScope scope;
v8::Isolate *isolate = v8::Isolate::GetCurrent();
v8::Local<v8::Private> private_key = v8::Private::ForApi(isolate, key);
return object->DeletePrivate(isolate->GetCurrentContext(), private_key);
#else
return Just(object->DeleteHiddenValue(key));
#endif
}
#endif // NAN_PRIVATE_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2021 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_SCRIPTORIGIN_H_
#define NAN_SCRIPTORIGIN_H_
class ScriptOrigin : public v8::ScriptOrigin {
public:
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 9 || \
(V8_MAJOR_VERSION == 9 && (defined(V8_MINOR_VERSION) && (V8_MINOR_VERSION > 0\
|| (V8_MINOR_VERSION == 0 && defined(V8_BUILD_NUMBER) \
&& V8_BUILD_NUMBER >= 1)))))
explicit ScriptOrigin(v8::Local<v8::Value> name) :
v8::ScriptOrigin(v8::Isolate::GetCurrent(), name) {}
ScriptOrigin(v8::Local<v8::Value> name
, v8::Local<v8::Integer> line) :
v8::ScriptOrigin(v8::Isolate::GetCurrent()
, name
, To<int32_t>(line).FromMaybe(0)) {}
ScriptOrigin(v8::Local<v8::Value> name
, v8::Local<v8::Integer> line
, v8::Local<v8::Integer> column) :
v8::ScriptOrigin(v8::Isolate::GetCurrent()
, name
, To<int32_t>(line).FromMaybe(0)
, To<int32_t>(column).FromMaybe(0)) {}
#elif defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 8 || \
(V8_MAJOR_VERSION == 8 && (defined(V8_MINOR_VERSION) && (V8_MINOR_VERSION > 9\
|| (V8_MINOR_VERSION == 9 && defined(V8_BUILD_NUMBER) \
&& V8_BUILD_NUMBER >= 45)))))
explicit ScriptOrigin(v8::Local<v8::Value> name) : v8::ScriptOrigin(name) {}
ScriptOrigin(v8::Local<v8::Value> name
, v8::Local<v8::Integer> line) :
v8::ScriptOrigin(name, To<int32_t>(line).FromMaybe(0)) {}
ScriptOrigin(v8::Local<v8::Value> name
, v8::Local<v8::Integer> line
, v8::Local<v8::Integer> column) :
v8::ScriptOrigin(name
, To<int32_t>(line).FromMaybe(0)
, To<int32_t>(column).FromMaybe(0)) {}
#else
explicit ScriptOrigin(v8::Local<v8::Value> name) : v8::ScriptOrigin(name) {}
ScriptOrigin(v8::Local<v8::Value> name
, v8::Local<v8::Integer> line) : v8::ScriptOrigin(name, line) {}
ScriptOrigin(v8::Local<v8::Value> name
, v8::Local<v8::Integer> line
, v8::Local<v8::Integer> column) :
v8::ScriptOrigin(name, line, column) {}
#endif
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 8 || \
(V8_MAJOR_VERSION == 8 && (defined(V8_MINOR_VERSION) && (V8_MINOR_VERSION > 9\
|| (V8_MINOR_VERSION == 9 && defined(V8_BUILD_NUMBER) \
&& V8_BUILD_NUMBER >= 45)))))
v8::Local<v8::Integer> ResourceLineOffset() const {
return New(LineOffset());
}
v8::Local<v8::Integer> ResourceColumnOffset() const {
return New(ColumnOffset());
}
#endif
};
#endif // NAN_SCRIPTORIGIN_H_

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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef NAN_STRING_BYTES_H_
#define NAN_STRING_BYTES_H_
// Decodes a v8::Local<v8::String> or Buffer to a raw char*
namespace imp {
using v8::Local;
using v8::Object;
using v8::String;
using v8::Value;
//// Base 64 ////
#define base64_encoded_size(size) ((size + 2 - ((size + 2) % 3)) / 3 * 4)
//// HEX ////
static bool contains_non_ascii_slow(const char* buf, size_t len) {
for (size_t i = 0; i < len; ++i) {
if (buf[i] & 0x80) return true;
}
return false;
}
static bool contains_non_ascii(const char* src, size_t len) {
if (len < 16) {
return contains_non_ascii_slow(src, len);
}
const unsigned bytes_per_word = sizeof(void*);
const unsigned align_mask = bytes_per_word - 1;
const unsigned unaligned = reinterpret_cast<uintptr_t>(src) & align_mask;
if (unaligned > 0) {
const unsigned n = bytes_per_word - unaligned;
if (contains_non_ascii_slow(src, n)) return true;
src += n;
len -= n;
}
#if defined(__x86_64__) || defined(_WIN64)
const uintptr_t mask = 0x8080808080808080ll;
#else
const uintptr_t mask = 0x80808080l;
#endif
const uintptr_t* srcw = reinterpret_cast<const uintptr_t*>(src);
for (size_t i = 0, n = len / bytes_per_word; i < n; ++i) {
if (srcw[i] & mask) return true;
}
const unsigned remainder = len & align_mask;
if (remainder > 0) {
const size_t offset = len - remainder;
if (contains_non_ascii_slow(src + offset, remainder)) return true;
}
return false;
}
static void force_ascii_slow(const char* src, char* dst, size_t len) {
for (size_t i = 0; i < len; ++i) {
dst[i] = src[i] & 0x7f;
}
}
static void force_ascii(const char* src, char* dst, size_t len) {
if (len < 16) {
force_ascii_slow(src, dst, len);
return;
}
const unsigned bytes_per_word = sizeof(void*);
const unsigned align_mask = bytes_per_word - 1;
const unsigned src_unalign = reinterpret_cast<uintptr_t>(src) & align_mask;
const unsigned dst_unalign = reinterpret_cast<uintptr_t>(dst) & align_mask;
if (src_unalign > 0) {
if (src_unalign == dst_unalign) {
const unsigned unalign = bytes_per_word - src_unalign;
force_ascii_slow(src, dst, unalign);
src += unalign;
dst += unalign;
len -= src_unalign;
} else {
force_ascii_slow(src, dst, len);
return;
}
}
#if defined(__x86_64__) || defined(_WIN64)
const uintptr_t mask = ~0x8080808080808080ll;
#else
const uintptr_t mask = ~0x80808080l;
#endif
const uintptr_t* srcw = reinterpret_cast<const uintptr_t*>(src);
uintptr_t* dstw = reinterpret_cast<uintptr_t*>(dst);
for (size_t i = 0, n = len / bytes_per_word; i < n; ++i) {
dstw[i] = srcw[i] & mask;
}
const unsigned remainder = len & align_mask;
if (remainder > 0) {
const size_t offset = len - remainder;
force_ascii_slow(src + offset, dst + offset, remainder);
}
}
static size_t base64_encode(const char* src,
size_t slen,
char* dst,
size_t dlen) {
// We know how much we'll write, just make sure that there's space.
assert(dlen >= base64_encoded_size(slen) &&
"not enough space provided for base64 encode");
dlen = base64_encoded_size(slen);
unsigned a;
unsigned b;
unsigned c;
unsigned i;
unsigned k;
unsigned n;
static const char table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";
i = 0;
k = 0;
n = slen / 3 * 3;
while (i < n) {
a = src[i + 0] & 0xff;
b = src[i + 1] & 0xff;
c = src[i + 2] & 0xff;
dst[k + 0] = table[a >> 2];
dst[k + 1] = table[((a & 3) << 4) | (b >> 4)];
dst[k + 2] = table[((b & 0x0f) << 2) | (c >> 6)];
dst[k + 3] = table[c & 0x3f];
i += 3;
k += 4;
}
if (n != slen) {
switch (slen - n) {
case 1:
a = src[i + 0] & 0xff;
dst[k + 0] = table[a >> 2];
dst[k + 1] = table[(a & 3) << 4];
dst[k + 2] = '=';
dst[k + 3] = '=';
break;
case 2:
a = src[i + 0] & 0xff;
b = src[i + 1] & 0xff;
dst[k + 0] = table[a >> 2];
dst[k + 1] = table[((a & 3) << 4) | (b >> 4)];
dst[k + 2] = table[(b & 0x0f) << 2];
dst[k + 3] = '=';
break;
}
}
return dlen;
}
static size_t hex_encode(const char* src, size_t slen, char* dst, size_t dlen) {
// We know how much we'll write, just make sure that there's space.
assert(dlen >= slen * 2 &&
"not enough space provided for hex encode");
dlen = slen * 2;
for (uint32_t i = 0, k = 0; k < dlen; i += 1, k += 2) {
static const char hex[] = "0123456789abcdef";
uint8_t val = static_cast<uint8_t>(src[i]);
dst[k + 0] = hex[val >> 4];
dst[k + 1] = hex[val & 15];
}
return dlen;
}
static Local<Value> Encode(const char* buf,
size_t buflen,
enum Encoding encoding) {
assert(buflen <= node::Buffer::kMaxLength);
if (!buflen && encoding != BUFFER)
return New("").ToLocalChecked();
Local<String> val;
switch (encoding) {
case BUFFER:
return CopyBuffer(buf, buflen).ToLocalChecked();
case ASCII:
if (contains_non_ascii(buf, buflen)) {
char* out = new char[buflen];
force_ascii(buf, out, buflen);
val = New<String>(out, buflen).ToLocalChecked();
delete[] out;
} else {
val = New<String>(buf, buflen).ToLocalChecked();
}
break;
case UTF8:
val = New<String>(buf, buflen).ToLocalChecked();
break;
case BINARY: {
// TODO(isaacs) use ExternalTwoByteString?
const unsigned char *cbuf = reinterpret_cast<const unsigned char*>(buf);
uint16_t * twobytebuf = new uint16_t[buflen];
for (size_t i = 0; i < buflen; i++) {
// XXX is the following line platform independent?
twobytebuf[i] = cbuf[i];
}
val = New<String>(twobytebuf, buflen).ToLocalChecked();
delete[] twobytebuf;
break;
}
case BASE64: {
size_t dlen = base64_encoded_size(buflen);
char* dst = new char[dlen];
size_t written = base64_encode(buf, buflen, dst, dlen);
assert(written == dlen);
val = New<String>(dst, dlen).ToLocalChecked();
delete[] dst;
break;
}
case UCS2: {
const uint16_t* data = reinterpret_cast<const uint16_t*>(buf);
val = New<String>(data, buflen / 2).ToLocalChecked();
break;
}
case HEX: {
size_t dlen = buflen * 2;
char* dst = new char[dlen];
size_t written = hex_encode(buf, buflen, dst, dlen);
assert(written == dlen);
val = New<String>(dst, dlen).ToLocalChecked();
delete[] dst;
break;
}
default:
assert(0 && "unknown encoding");
break;
}
return val;
}
#undef base64_encoded_size
} // end of namespace imp
#endif // NAN_STRING_BYTES_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_TYPEDARRAY_CONTENTS_H_
#define NAN_TYPEDARRAY_CONTENTS_H_
template<typename T>
class TypedArrayContents {
public:
inline explicit TypedArrayContents(v8::Local<v8::Value> from) :
length_(0), data_(NULL) {
HandleScope scope;
size_t length = 0;
void* data = NULL;
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
if (from->IsArrayBufferView()) {
v8::Local<v8::ArrayBufferView> array =
v8::Local<v8::ArrayBufferView>::Cast(from);
const size_t byte_length = array->ByteLength();
const ptrdiff_t byte_offset = array->ByteOffset();
v8::Local<v8::ArrayBuffer> buffer = array->Buffer();
length = byte_length / sizeof(T);
// Actually it's 7.9 here but this would lead to ABI issues with Node.js 13
// using 7.8 till 13.2.0.
#if (V8_MAJOR_VERSION >= 8)
data = static_cast<char*>(buffer->GetBackingStore()->Data()) + byte_offset;
#else
data = static_cast<char*>(buffer->GetContents().Data()) + byte_offset;
#endif
}
#else
if (from->IsObject() && !from->IsNull()) {
v8::Local<v8::Object> array = v8::Local<v8::Object>::Cast(from);
MaybeLocal<v8::Value> buffer = Get(array,
New<v8::String>("buffer").ToLocalChecked());
MaybeLocal<v8::Value> byte_length = Get(array,
New<v8::String>("byteLength").ToLocalChecked());
MaybeLocal<v8::Value> byte_offset = Get(array,
New<v8::String>("byteOffset").ToLocalChecked());
if (!buffer.IsEmpty() &&
!byte_length.IsEmpty() && byte_length.ToLocalChecked()->IsUint32() &&
!byte_offset.IsEmpty() && byte_offset.ToLocalChecked()->IsUint32()) {
data = array->GetIndexedPropertiesExternalArrayData();
if(data) {
length = byte_length.ToLocalChecked()->Uint32Value() / sizeof(T);
}
}
}
#endif
#if defined(_MSC_VER) && _MSC_VER >= 1900 || __cplusplus >= 201103L
assert(reinterpret_cast<uintptr_t>(data) % alignof (T) == 0);
#elif defined(_MSC_VER) && _MSC_VER >= 1600 || defined(__GNUC__)
assert(reinterpret_cast<uintptr_t>(data) % __alignof(T) == 0);
#else
assert(reinterpret_cast<uintptr_t>(data) % sizeof (T) == 0);
#endif
length_ = length;
data_ = static_cast<T*>(data);
}
inline size_t length() const { return length_; }
inline T* operator*() { return data_; }
inline const T* operator*() const { return data_; }
private:
NAN_DISALLOW_ASSIGN_COPY_MOVE(TypedArrayContents)
//Disable heap allocation
void *operator new(size_t size);
void operator delete(void *, size_t) {
abort();
}
size_t length_;
T* data_;
};
#endif // NAN_TYPEDARRAY_CONTENTS_H_

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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_WEAK_H_
#define NAN_WEAK_H_
static const int kInternalFieldsInWeakCallback = 2;
static const int kNoInternalFieldIndex = -1;
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
# define NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_ \
v8::WeakCallbackInfo<WeakCallbackInfo<T> > const&
# define NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_ \
NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_
# define NAN_WEAK_PARAMETER_CALLBACK_SIG_ NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_
# define NAN_WEAK_TWOFIELD_CALLBACK_SIG_ NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_
#elif NODE_MODULE_VERSION > IOJS_1_1_MODULE_VERSION
# define NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_ \
v8::PhantomCallbackData<WeakCallbackInfo<T> > const&
# define NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_ \
NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_
# define NAN_WEAK_PARAMETER_CALLBACK_SIG_ NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_
# define NAN_WEAK_TWOFIELD_CALLBACK_SIG_ NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_
#elif NODE_MODULE_VERSION > NODE_0_12_MODULE_VERSION
# define NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_ \
v8::PhantomCallbackData<WeakCallbackInfo<T> > const&
# define NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_ \
v8::InternalFieldsCallbackData<WeakCallbackInfo<T>, void> const&
# define NAN_WEAK_PARAMETER_CALLBACK_SIG_ NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_
# define NAN_WEAK_TWOFIELD_CALLBACK_SIG_ NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_
#elif NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION
# define NAN_WEAK_CALLBACK_DATA_TYPE_ \
v8::WeakCallbackData<S, WeakCallbackInfo<T> > const&
# define NAN_WEAK_CALLBACK_SIG_ NAN_WEAK_CALLBACK_DATA_TYPE_
#else
# define NAN_WEAK_CALLBACK_DATA_TYPE_ void *
# define NAN_WEAK_CALLBACK_SIG_ \
v8::Persistent<v8::Value>, NAN_WEAK_CALLBACK_DATA_TYPE_
#endif
template<typename T>
class WeakCallbackInfo {
public:
typedef void (*Callback)(const WeakCallbackInfo<T>& data);
WeakCallbackInfo(
Persistent<v8::Value> *persistent
, Callback callback
, void *parameter
, void *field1 = 0
, void *field2 = 0) :
callback_(callback), isolate_(0), parameter_(parameter) {
std::memcpy(&persistent_, persistent, sizeof (v8::Persistent<v8::Value>));
internal_fields_[0] = field1;
internal_fields_[1] = field2;
}
inline v8::Isolate *GetIsolate() const { return isolate_; }
inline T *GetParameter() const { return static_cast<T*>(parameter_); }
inline void *GetInternalField(int index) const {
assert((index == 0 || index == 1) && "internal field index out of bounds");
if (index == 0) {
return internal_fields_[0];
} else {
return internal_fields_[1];
}
}
private:
NAN_DISALLOW_ASSIGN_COPY_MOVE(WeakCallbackInfo)
Callback callback_;
v8::Isolate *isolate_;
void *parameter_;
void *internal_fields_[kInternalFieldsInWeakCallback];
v8::Persistent<v8::Value> persistent_;
template<typename S, typename M> friend class Persistent;
template<typename S> friend class PersistentBase;
#if NODE_MODULE_VERSION <= NODE_0_12_MODULE_VERSION
# if NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION
template<typename S>
static void invoke(NAN_WEAK_CALLBACK_SIG_ data);
template<typename S>
static WeakCallbackInfo *unwrap(NAN_WEAK_CALLBACK_DATA_TYPE_ data);
# else
static void invoke(NAN_WEAK_CALLBACK_SIG_ data);
static WeakCallbackInfo *unwrap(NAN_WEAK_CALLBACK_DATA_TYPE_ data);
# endif
#else
# if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
template<bool isFirstPass>
static void invokeparameter(NAN_WEAK_PARAMETER_CALLBACK_SIG_ data);
template<bool isFirstPass>
static void invoketwofield(NAN_WEAK_TWOFIELD_CALLBACK_SIG_ data);
# else
static void invokeparameter(NAN_WEAK_PARAMETER_CALLBACK_SIG_ data);
static void invoketwofield(NAN_WEAK_TWOFIELD_CALLBACK_SIG_ data);
# endif
static WeakCallbackInfo *unwrapparameter(
NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_ data);
static WeakCallbackInfo *unwraptwofield(
NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_ data);
#endif
};
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
template<typename T>
template<bool isFirstPass>
void
WeakCallbackInfo<T>::invokeparameter(NAN_WEAK_PARAMETER_CALLBACK_SIG_ data) {
WeakCallbackInfo<T> *cbinfo = unwrapparameter(data);
if (isFirstPass) {
cbinfo->persistent_.Reset();
data.SetSecondPassCallback(invokeparameter<false>);
} else {
cbinfo->callback_(*cbinfo);
delete cbinfo;
}
}
template<typename T>
template<bool isFirstPass>
void
WeakCallbackInfo<T>::invoketwofield(NAN_WEAK_TWOFIELD_CALLBACK_SIG_ data) {
WeakCallbackInfo<T> *cbinfo = unwraptwofield(data);
if (isFirstPass) {
cbinfo->persistent_.Reset();
data.SetSecondPassCallback(invoketwofield<false>);
} else {
cbinfo->callback_(*cbinfo);
delete cbinfo;
}
}
template<typename T>
WeakCallbackInfo<T> *WeakCallbackInfo<T>::unwrapparameter(
NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_ data) {
WeakCallbackInfo<T> *cbinfo =
static_cast<WeakCallbackInfo<T>*>(data.GetParameter());
cbinfo->isolate_ = data.GetIsolate();
return cbinfo;
}
template<typename T>
WeakCallbackInfo<T> *WeakCallbackInfo<T>::unwraptwofield(
NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_ data) {
WeakCallbackInfo<T> *cbinfo =
static_cast<WeakCallbackInfo<T>*>(data.GetInternalField(0));
cbinfo->isolate_ = data.GetIsolate();
return cbinfo;
}
#undef NAN_WEAK_PARAMETER_CALLBACK_SIG_
#undef NAN_WEAK_TWOFIELD_CALLBACK_SIG_
#undef NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_
#undef NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_
# elif NODE_MODULE_VERSION > NODE_0_12_MODULE_VERSION
template<typename T>
void
WeakCallbackInfo<T>::invokeparameter(NAN_WEAK_PARAMETER_CALLBACK_SIG_ data) {
WeakCallbackInfo<T> *cbinfo = unwrapparameter(data);
cbinfo->persistent_.Reset();
cbinfo->callback_(*cbinfo);
delete cbinfo;
}
template<typename T>
void
WeakCallbackInfo<T>::invoketwofield(NAN_WEAK_TWOFIELD_CALLBACK_SIG_ data) {
WeakCallbackInfo<T> *cbinfo = unwraptwofield(data);
cbinfo->persistent_.Reset();
cbinfo->callback_(*cbinfo);
delete cbinfo;
}
template<typename T>
WeakCallbackInfo<T> *WeakCallbackInfo<T>::unwrapparameter(
NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_ data) {
WeakCallbackInfo<T> *cbinfo =
static_cast<WeakCallbackInfo<T>*>(data.GetParameter());
cbinfo->isolate_ = data.GetIsolate();
return cbinfo;
}
template<typename T>
WeakCallbackInfo<T> *WeakCallbackInfo<T>::unwraptwofield(
NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_ data) {
WeakCallbackInfo<T> *cbinfo =
static_cast<WeakCallbackInfo<T>*>(data.GetInternalField1());
cbinfo->isolate_ = data.GetIsolate();
return cbinfo;
}
#undef NAN_WEAK_PARAMETER_CALLBACK_SIG_
#undef NAN_WEAK_TWOFIELD_CALLBACK_SIG_
#undef NAN_WEAK_PARAMETER_CALLBACK_DATA_TYPE_
#undef NAN_WEAK_TWOFIELD_CALLBACK_DATA_TYPE_
#elif NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION
template<typename T>
template<typename S>
void WeakCallbackInfo<T>::invoke(NAN_WEAK_CALLBACK_SIG_ data) {
WeakCallbackInfo<T> *cbinfo = unwrap(data);
cbinfo->persistent_.Reset();
cbinfo->callback_(*cbinfo);
delete cbinfo;
}
template<typename T>
template<typename S>
WeakCallbackInfo<T> *WeakCallbackInfo<T>::unwrap(
NAN_WEAK_CALLBACK_DATA_TYPE_ data) {
void *parameter = data.GetParameter();
WeakCallbackInfo<T> *cbinfo =
static_cast<WeakCallbackInfo<T>*>(parameter);
cbinfo->isolate_ = data.GetIsolate();
return cbinfo;
}
#undef NAN_WEAK_CALLBACK_SIG_
#undef NAN_WEAK_CALLBACK_DATA_TYPE_
#else
template<typename T>
void WeakCallbackInfo<T>::invoke(NAN_WEAK_CALLBACK_SIG_ data) {
WeakCallbackInfo<T> *cbinfo = unwrap(data);
cbinfo->persistent_.Dispose();
cbinfo->persistent_.Clear();
cbinfo->callback_(*cbinfo);
delete cbinfo;
}
template<typename T>
WeakCallbackInfo<T> *WeakCallbackInfo<T>::unwrap(
NAN_WEAK_CALLBACK_DATA_TYPE_ data) {
WeakCallbackInfo<T> *cbinfo =
static_cast<WeakCallbackInfo<T>*>(data);
cbinfo->isolate_ = v8::Isolate::GetCurrent();
return cbinfo;
}
#undef NAN_WEAK_CALLBACK_SIG_
#undef NAN_WEAK_CALLBACK_DATA_TYPE_
#endif
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 || \
(V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))
template<typename T, typename M>
template<typename P>
inline void Persistent<T, M>::SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type) {
WeakCallbackInfo<P> *wcbd;
if (type == WeakCallbackType::kParameter) {
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, parameter);
v8::PersistentBase<T>::SetWeak(
wcbd
, WeakCallbackInfo<P>::template invokeparameter<true>
, type);
} else {
v8::Local<v8::Value>* self_v(reinterpret_cast<v8::Local<v8::Value>*>(this));
assert((*self_v)->IsObject());
v8::Local<v8::Object> self((*self_v).As<v8::Object>());
int count = self->InternalFieldCount();
void *internal_fields[kInternalFieldsInWeakCallback] = {0, 0};
for (int i = 0; i < count && i < kInternalFieldsInWeakCallback; i++) {
internal_fields[i] = self->GetAlignedPointerFromInternalField(i);
}
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, 0
, internal_fields[0]
, internal_fields[1]);
self->SetAlignedPointerInInternalField(0, wcbd);
v8::PersistentBase<T>::SetWeak(
static_cast<WeakCallbackInfo<P>*>(0)
, WeakCallbackInfo<P>::template invoketwofield<true>
, type);
}
}
#elif NODE_MODULE_VERSION > IOJS_1_1_MODULE_VERSION
template<typename T, typename M>
template<typename P>
inline void Persistent<T, M>::SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type) {
WeakCallbackInfo<P> *wcbd;
if (type == WeakCallbackType::kParameter) {
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, parameter);
v8::PersistentBase<T>::SetPhantom(
wcbd
, WeakCallbackInfo<P>::invokeparameter);
} else {
v8::Local<v8::Value>* self_v(reinterpret_cast<v8::Local<v8::Value>*>(this));
assert((*self_v)->IsObject());
v8::Local<v8::Object> self((*self_v).As<v8::Object>());
int count = self->InternalFieldCount();
void *internal_fields[kInternalFieldsInWeakCallback] = {0, 0};
for (int i = 0; i < count && i < kInternalFieldsInWeakCallback; i++) {
internal_fields[i] = self->GetAlignedPointerFromInternalField(i);
}
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, 0
, internal_fields[0]
, internal_fields[1]);
self->SetAlignedPointerInInternalField(0, wcbd);
v8::PersistentBase<T>::SetPhantom(
static_cast<WeakCallbackInfo<P>*>(0)
, WeakCallbackInfo<P>::invoketwofield
, 0
, count > 1 ? 1 : kNoInternalFieldIndex);
}
}
#elif NODE_MODULE_VERSION > NODE_0_12_MODULE_VERSION
template<typename T, typename M>
template<typename P>
inline void Persistent<T, M>::SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type) {
WeakCallbackInfo<P> *wcbd;
if (type == WeakCallbackType::kParameter) {
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, parameter);
v8::PersistentBase<T>::SetPhantom(
wcbd
, WeakCallbackInfo<P>::invokeparameter);
} else {
v8::Local<v8::Value>* self_v(reinterpret_cast<v8::Local<v8::Value>*>(this));
assert((*self_v)->IsObject());
v8::Local<v8::Object> self((*self_v).As<v8::Object>());
int count = self->InternalFieldCount();
void *internal_fields[kInternalFieldsInWeakCallback] = {0, 0};
for (int i = 0; i < count && i < kInternalFieldsInWeakCallback; i++) {
internal_fields[i] = self->GetAlignedPointerFromInternalField(i);
}
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, 0
, internal_fields[0]
, internal_fields[1]);
self->SetAlignedPointerInInternalField(0, wcbd);
v8::PersistentBase<T>::SetPhantom(
WeakCallbackInfo<P>::invoketwofield
, 0
, count > 1 ? 1 : kNoInternalFieldIndex);
}
}
#elif NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION
template<typename T, typename M>
template<typename P>
inline void Persistent<T, M>::SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type) {
WeakCallbackInfo<P> *wcbd;
if (type == WeakCallbackType::kParameter) {
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, parameter);
v8::PersistentBase<T>::SetWeak(wcbd, WeakCallbackInfo<P>::invoke);
} else {
v8::Local<v8::Value>* self_v(reinterpret_cast<v8::Local<v8::Value>*>(this));
assert((*self_v)->IsObject());
v8::Local<v8::Object> self((*self_v).As<v8::Object>());
int count = self->InternalFieldCount();
void *internal_fields[kInternalFieldsInWeakCallback] = {0, 0};
for (int i = 0; i < count && i < kInternalFieldsInWeakCallback; i++) {
internal_fields[i] = self->GetAlignedPointerFromInternalField(i);
}
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, 0
, internal_fields[0]
, internal_fields[1]);
v8::PersistentBase<T>::SetWeak(wcbd, WeakCallbackInfo<P>::invoke);
}
}
#else
template<typename T>
template<typename P>
inline void PersistentBase<T>::SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type) {
WeakCallbackInfo<P> *wcbd;
if (type == WeakCallbackType::kParameter) {
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, parameter);
persistent.MakeWeak(wcbd, WeakCallbackInfo<P>::invoke);
} else {
v8::Local<v8::Value>* self_v(reinterpret_cast<v8::Local<v8::Value>*>(this));
assert((*self_v)->IsObject());
v8::Local<v8::Object> self((*self_v).As<v8::Object>());
int count = self->InternalFieldCount();
void *internal_fields[kInternalFieldsInWeakCallback] = {0, 0};
for (int i = 0; i < count && i < kInternalFieldsInWeakCallback; i++) {
internal_fields[i] = self->GetPointerFromInternalField(i);
}
wcbd = new WeakCallbackInfo<P>(
reinterpret_cast<Persistent<v8::Value>*>(this)
, callback
, 0
, internal_fields[0]
, internal_fields[1]);
persistent.MakeWeak(wcbd, WeakCallbackInfo<P>::invoke);
}
}
#endif
#endif // NAN_WEAK_H_

37
node_modules/nan/package.json generated vendored Normal file
View file

@ -0,0 +1,37 @@
{
"name": "nan",
"version": "2.15.0",
"description": "Native Abstractions for Node.js: C++ header for Node 0.8 -> 14 compatibility",
"main": "include_dirs.js",
"repository": {
"type": "git",
"url": "git://github.com/nodejs/nan.git"
},
"scripts": {
"test": "tap --gc --stderr test/js/*-test.js",
"test:worker": "node --experimental-worker test/tap-as-worker.js --gc --stderr test/js/*-test.js",
"rebuild-tests": "node-gyp rebuild --msvs_version=2015 --directory test",
"docs": "doc/.build.sh"
},
"contributors": [
"Rod Vagg <r@va.gg> (https://github.com/rvagg)",
"Benjamin Byholm <bbyholm@abo.fi> (https://github.com/kkoopa/)",
"Trevor Norris <trev.norris@gmail.com> (https://github.com/trevnorris)",
"Nathan Rajlich <nathan@tootallnate.net> (https://github.com/TooTallNate)",
"Brett Lawson <brett19@gmail.com> (https://github.com/brett19)",
"Ben Noordhuis <info@bnoordhuis.nl> (https://github.com/bnoordhuis)",
"David Siegel <david@artcom.de> (https://github.com/agnat)",
"Michael Ira Krufky <mkrufky@gmail.com> (https://github.com/mkrufky)"
],
"devDependencies": {
"bindings": "~1.2.1",
"commander": "^2.8.1",
"glob": "^5.0.14",
"request": "=2.81.0",
"node-gyp": "~3.6.2",
"readable-stream": "^2.1.4",
"tap": "~0.7.1",
"xtend": "~4.0.0"
},
"license": "MIT"
}

412
node_modules/nan/tools/1to2.js generated vendored Executable file
View file

@ -0,0 +1,412 @@
#!/usr/bin/env node
/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
var commander = require('commander'),
fs = require('fs'),
glob = require('glob'),
groups = [],
total = 0,
warning1 = '/* ERROR: Rewrite using Buffer */\n',
warning2 = '\\/\\* ERROR\\: Rewrite using Buffer \\*\\/\\n',
length,
i;
fs.readFile(__dirname + '/package.json', 'utf8', function (err, data) {
if (err) {
throw err;
}
commander
.version(JSON.parse(data).version)
.usage('[options] <file ...>')
.parse(process.argv);
if (!process.argv.slice(2).length) {
commander.outputHelp();
}
});
/* construct strings representing regular expressions
each expression contains a unique group allowing for identification of the match
the index of this key group, relative to the regular expression in question,
is indicated by the first array member */
/* simple substistutions, key group is the entire match, 0 */
groups.push([0, [
'_NAN_',
'NODE_SET_METHOD',
'NODE_SET_PROTOTYPE_METHOD',
'NanAsciiString',
'NanEscapeScope',
'NanReturnValue',
'NanUcs2String'].join('|')]);
/* substitutions of parameterless macros, key group is 1 */
groups.push([1, ['(', [
'NanEscapableScope',
'NanReturnNull',
'NanReturnUndefined',
'NanScope'].join('|'), ')\\(\\)'].join('')]);
/* replace TryCatch with NanTryCatch once, gobbling possible namespace, key group 2 */
groups.push([2, '(?:(?:v8\\:\\:)?|(Nan)?)(TryCatch)']);
/* NanNew("string") will likely not fail a ToLocalChecked(), key group 1 */
groups.push([1, ['(NanNew)', '(\\("[^\\"]*"[^\\)]*\\))(?!\\.ToLocalChecked\\(\\))'].join('')]);
/* Removed v8 APIs, warn that the code needs rewriting using node::Buffer, key group 2 */
groups.push([2, ['(', warning2, ')?', '^.*?(', [
'GetIndexedPropertiesExternalArrayDataLength',
'GetIndexedPropertiesExternalArrayData',
'GetIndexedPropertiesExternalArrayDataType',
'GetIndexedPropertiesPixelData',
'GetIndexedPropertiesPixelDataLength',
'HasIndexedPropertiesInExternalArrayData',
'HasIndexedPropertiesInPixelData',
'SetIndexedPropertiesToExternalArrayData',
'SetIndexedPropertiesToPixelData'].join('|'), ')'].join('')]);
/* No need for NanScope in V8-exposed methods, key group 2 */
groups.push([2, ['((', [
'NAN_METHOD',
'NAN_GETTER',
'NAN_SETTER',
'NAN_PROPERTY_GETTER',
'NAN_PROPERTY_SETTER',
'NAN_PROPERTY_ENUMERATOR',
'NAN_PROPERTY_DELETER',
'NAN_PROPERTY_QUERY',
'NAN_INDEX_GETTER',
'NAN_INDEX_SETTER',
'NAN_INDEX_ENUMERATOR',
'NAN_INDEX_DELETER',
'NAN_INDEX_QUERY'].join('|'), ')\\([^\\)]*\\)\\s*\\{)\\s*NanScope\\(\\)\\s*;'].join('')]);
/* v8::Value::ToXXXXXXX returns v8::MaybeLocal<T>, key group 3 */
groups.push([3, ['([\\s\\(\\)])([^\\s\\(\\)]+)->(', [
'Boolean',
'Number',
'String',
'Object',
'Integer',
'Uint32',
'Int32'].join('|'), ')\\('].join('')]);
/* v8::Value::XXXXXXXValue returns v8::Maybe<T>, key group 3 */
groups.push([3, ['([\\s\\(\\)])([^\\s\\(\\)]+)->((?:', [
'Boolean',
'Number',
'Integer',
'Uint32',
'Int32'].join('|'), ')Value)\\('].join('')]);
/* NAN_WEAK_CALLBACK macro was removed, write out callback definition, key group 1 */
groups.push([1, '(NAN_WEAK_CALLBACK)\\(([^\\s\\)]+)\\)']);
/* node::ObjectWrap and v8::Persistent have been replaced with Nan implementations, key group 1 */
groups.push([1, ['(', [
'NanDisposePersistent',
'NanObjectWrapHandle'].join('|'), ')\\s*\\(\\s*([^\\s\\)]+)'].join('')]);
/* Since NanPersistent there is no need for NanMakeWeakPersistent, key group 1 */
groups.push([1, '(NanMakeWeakPersistent)\\s*\\(\\s*([^\\s,]+)\\s*,\\s*']);
/* Many methods of v8::Object and others now return v8::MaybeLocal<T>, key group 3 */
groups.push([3, ['([\\s])([^\\s]+)->(', [
'GetEndColumn',
'GetFunction',
'GetLineNumber',
'NewInstance',
'GetPropertyNames',
'GetOwnPropertyNames',
'GetSourceLine',
'GetStartColumn',
'ObjectProtoToString',
'ToArrayIndex',
'ToDetailString',
'CallAsConstructor',
'CallAsFunction',
'CloneElementAt',
'Delete',
'ForceSet',
'Get',
'GetPropertyAttributes',
'GetRealNamedProperty',
'GetRealNamedPropertyInPrototypeChain',
'Has',
'HasOwnProperty',
'HasRealIndexedProperty',
'HasRealNamedCallbackProperty',
'HasRealNamedProperty',
'Set',
'SetAccessor',
'SetIndexedPropertyHandler',
'SetNamedPropertyHandler',
'SetPrototype'].join('|'), ')\\('].join('')]);
/* You should get an error if any of these fail anyways,
or handle the error better, it is indicated either way, key group 2 */
groups.push([2, ['NanNew(<(?:v8\\:\\:)?(', ['Date', 'String', 'RegExp'].join('|'), ')>)(\\([^\\)]*\\))(?!\\.ToLocalChecked\\(\\))'].join('')]);
/* v8::Value::Equals now returns a v8::Maybe, key group 3 */
groups.push([3, '([\\s\\(\\)])([^\\s\\(\\)]+)->(Equals)\\(([^\\s\\)]+)']);
/* NanPersistent makes this unnecessary, key group 1 */
groups.push([1, '(NanAssignPersistent)(?:<v8\\:\\:[^>]+>)?\\(([^,]+),\\s*']);
/* args has been renamed to info, key group 2 */
groups.push([2, '(\\W)(args)(\\W)'])
/* node::ObjectWrap was replaced with NanObjectWrap, key group 2 */
groups.push([2, '(\\W)(?:node\\:\\:)?(ObjectWrap)(\\W)']);
/* v8::Persistent was replaced with NanPersistent, key group 2 */
groups.push([2, '(\\W)(?:v8\\:\\:)?(Persistent)(\\W)']);
/* counts the number of capturing groups in a well-formed regular expression,
ignoring non-capturing groups and escaped parentheses */
function groupcount(s) {
var positive = s.match(/\((?!\?)/g),
negative = s.match(/\\\(/g);
return (positive ? positive.length : 0) - (negative ? negative.length : 0);
}
/* compute the absolute position of each key group in the joined master RegExp */
for (i = 1, length = groups.length; i < length; i++) {
total += groupcount(groups[i - 1][1]);
groups[i][0] += total;
}
/* create the master RegExp, whis is the union of all the groups' expressions */
master = new RegExp(groups.map(function (a) { return a[1]; }).join('|'), 'gm');
/* replacement function for String.replace, receives 21 arguments */
function replace() {
/* simple expressions */
switch (arguments[groups[0][0]]) {
case '_NAN_':
return 'NAN_';
case 'NODE_SET_METHOD':
return 'NanSetMethod';
case 'NODE_SET_PROTOTYPE_METHOD':
return 'NanSetPrototypeMethod';
case 'NanAsciiString':
return 'NanUtf8String';
case 'NanEscapeScope':
return 'scope.Escape';
case 'NanReturnNull':
return 'info.GetReturnValue().SetNull';
case 'NanReturnValue':
return 'info.GetReturnValue().Set';
case 'NanUcs2String':
return 'v8::String::Value';
default:
}
/* macros without arguments */
switch (arguments[groups[1][0]]) {
case 'NanEscapableScope':
return 'NanEscapableScope scope'
case 'NanReturnUndefined':
return 'return';
case 'NanScope':
return 'NanScope scope';
default:
}
/* TryCatch, emulate negative backref */
if (arguments[groups[2][0]] === 'TryCatch') {
return arguments[groups[2][0] - 1] ? arguments[0] : 'NanTryCatch';
}
/* NanNew("foo") --> NanNew("foo").ToLocalChecked() */
if (arguments[groups[3][0]] === 'NanNew') {
return [arguments[0], '.ToLocalChecked()'].join('');
}
/* insert warning for removed functions as comment on new line above */
switch (arguments[groups[4][0]]) {
case 'GetIndexedPropertiesExternalArrayData':
case 'GetIndexedPropertiesExternalArrayDataLength':
case 'GetIndexedPropertiesExternalArrayDataType':
case 'GetIndexedPropertiesPixelData':
case 'GetIndexedPropertiesPixelDataLength':
case 'HasIndexedPropertiesInExternalArrayData':
case 'HasIndexedPropertiesInPixelData':
case 'SetIndexedPropertiesToExternalArrayData':
case 'SetIndexedPropertiesToPixelData':
return arguments[groups[4][0] - 1] ? arguments[0] : [warning1, arguments[0]].join('');
default:
}
/* remove unnecessary NanScope() */
switch (arguments[groups[5][0]]) {
case 'NAN_GETTER':
case 'NAN_METHOD':
case 'NAN_SETTER':
case 'NAN_INDEX_DELETER':
case 'NAN_INDEX_ENUMERATOR':
case 'NAN_INDEX_GETTER':
case 'NAN_INDEX_QUERY':
case 'NAN_INDEX_SETTER':
case 'NAN_PROPERTY_DELETER':
case 'NAN_PROPERTY_ENUMERATOR':
case 'NAN_PROPERTY_GETTER':
case 'NAN_PROPERTY_QUERY':
case 'NAN_PROPERTY_SETTER':
return arguments[groups[5][0] - 1];
default:
}
/* Value conversion */
switch (arguments[groups[6][0]]) {
case 'Boolean':
case 'Int32':
case 'Integer':
case 'Number':
case 'Object':
case 'String':
case 'Uint32':
return [arguments[groups[6][0] - 2], 'NanTo<v8::', arguments[groups[6][0]], '>(', arguments[groups[6][0] - 1]].join('');
default:
}
/* other value conversion */
switch (arguments[groups[7][0]]) {
case 'BooleanValue':
return [arguments[groups[7][0] - 2], 'NanTo<bool>(', arguments[groups[7][0] - 1]].join('');
case 'Int32Value':
return [arguments[groups[7][0] - 2], 'NanTo<int32_t>(', arguments[groups[7][0] - 1]].join('');
case 'IntegerValue':
return [arguments[groups[7][0] - 2], 'NanTo<int64_t>(', arguments[groups[7][0] - 1]].join('');
case 'Uint32Value':
return [arguments[groups[7][0] - 2], 'NanTo<uint32_t>(', arguments[groups[7][0] - 1]].join('');
default:
}
/* NAN_WEAK_CALLBACK */
if (arguments[groups[8][0]] === 'NAN_WEAK_CALLBACK') {
return ['template<typename T>\nvoid ',
arguments[groups[8][0] + 1], '(const NanWeakCallbackInfo<T> &data)'].join('');
}
/* use methods on NAN classes instead */
switch (arguments[groups[9][0]]) {
case 'NanDisposePersistent':
return [arguments[groups[9][0] + 1], '.Reset('].join('');
case 'NanObjectWrapHandle':
return [arguments[groups[9][0] + 1], '->handle('].join('');
default:
}
/* use method on NanPersistent instead */
if (arguments[groups[10][0]] === 'NanMakeWeakPersistent') {
return arguments[groups[10][0] + 1] + '.SetWeak(';
}
/* These return Maybes, the upper ones take no arguments */
switch (arguments[groups[11][0]]) {
case 'GetEndColumn':
case 'GetFunction':
case 'GetLineNumber':
case 'GetOwnPropertyNames':
case 'GetPropertyNames':
case 'GetSourceLine':
case 'GetStartColumn':
case 'NewInstance':
case 'ObjectProtoToString':
case 'ToArrayIndex':
case 'ToDetailString':
return [arguments[groups[11][0] - 2], 'Nan', arguments[groups[11][0]], '(', arguments[groups[11][0] - 1]].join('');
case 'CallAsConstructor':
case 'CallAsFunction':
case 'CloneElementAt':
case 'Delete':
case 'ForceSet':
case 'Get':
case 'GetPropertyAttributes':
case 'GetRealNamedProperty':
case 'GetRealNamedPropertyInPrototypeChain':
case 'Has':
case 'HasOwnProperty':
case 'HasRealIndexedProperty':
case 'HasRealNamedCallbackProperty':
case 'HasRealNamedProperty':
case 'Set':
case 'SetAccessor':
case 'SetIndexedPropertyHandler':
case 'SetNamedPropertyHandler':
case 'SetPrototype':
return [arguments[groups[11][0] - 2], 'Nan', arguments[groups[11][0]], '(', arguments[groups[11][0] - 1], ', '].join('');
default:
}
/* Automatic ToLocalChecked(), take it or leave it */
switch (arguments[groups[12][0]]) {
case 'Date':
case 'String':
case 'RegExp':
return ['NanNew', arguments[groups[12][0] - 1], arguments[groups[12][0] + 1], '.ToLocalChecked()'].join('');
default:
}
/* NanEquals is now required for uniformity */
if (arguments[groups[13][0]] === 'Equals') {
return [arguments[groups[13][0] - 1], 'NanEquals(', arguments[groups[13][0] - 1], ', ', arguments[groups[13][0] + 1]].join('');
}
/* use method on replacement class instead */
if (arguments[groups[14][0]] === 'NanAssignPersistent') {
return [arguments[groups[14][0] + 1], '.Reset('].join('');
}
/* args --> info */
if (arguments[groups[15][0]] === 'args') {
return [arguments[groups[15][0] - 1], 'info', arguments[groups[15][0] + 1]].join('');
}
/* ObjectWrap --> NanObjectWrap */
if (arguments[groups[16][0]] === 'ObjectWrap') {
return [arguments[groups[16][0] - 1], 'NanObjectWrap', arguments[groups[16][0] + 1]].join('');
}
/* Persistent --> NanPersistent */
if (arguments[groups[17][0]] === 'Persistent') {
return [arguments[groups[17][0] - 1], 'NanPersistent', arguments[groups[17][0] + 1]].join('');
}
/* This should not happen. A switch is probably missing a case if it does. */
throw 'Unhandled match: ' + arguments[0];
}
/* reads a file, runs replacement and writes it back */
function processFile(file) {
fs.readFile(file, {encoding: 'utf8'}, function (err, data) {
if (err) {
throw err;
}
/* run replacement twice, might need more runs */
fs.writeFile(file, data.replace(master, replace).replace(master, replace), function (err) {
if (err) {
throw err;
}
});
});
}
/* process file names from command line and process the identified files */
for (i = 2, length = process.argv.length; i < length; i++) {
glob(process.argv[i], function (err, matches) {
if (err) {
throw err;
}
matches.forEach(processFile);
});
}

14
node_modules/nan/tools/README.md generated vendored Normal file
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@ -0,0 +1,14 @@
1to2 naively converts source code files from NAN 1 to NAN 2. There will be erroneous conversions,
false positives and missed opportunities. The input files are rewritten in place. Make sure that
you have backups. You will have to manually review the changes afterwards and do some touchups.
```sh
$ tools/1to2.js
Usage: 1to2 [options] <file ...>
Options:
-h, --help output usage information
-V, --version output the version number
```

19
node_modules/nan/tools/package.json generated vendored Normal file
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{
"name": "1to2",
"version": "1.0.0",
"description": "NAN 1 -> 2 Migration Script",
"main": "1to2.js",
"repository": {
"type": "git",
"url": "git://github.com/nodejs/nan.git"
},
"contributors": [
"Benjamin Byholm <bbyholm@abo.fi> (https://github.com/kkoopa/)",
"Mathias Küsel (https://github.com/mathiask88/)"
],
"dependencies": {
"glob": "~5.0.10",
"commander": "~2.8.1"
},
"license": "MIT"
}

12
node_modules/tree-sitter-cli/cli.js generated vendored Executable file
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@ -0,0 +1,12 @@
#!/usr/bin/env node
const path = require('path');
const spawn = require("child_process").spawn;
const executable = process.platform === 'win32'
? 'tree-sitter.exe'
: 'tree-sitter';
spawn(
path.join(__dirname, executable),
process.argv.slice(2),
{stdio: 'inherit'}
).on('close', process.exit)

369
node_modules/tree-sitter-cli/dsl.d.ts generated vendored Normal file
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type AliasRule = {type: 'ALIAS'; named: boolean; content: Rule; value: string};
type BlankRule = {type: 'BLANK'};
type ChoiceRule = {type: 'CHOICE'; members: Rule[]};
type FieldRule = {type: 'FIELD'; name: string; content: Rule};
type ImmediateTokenRule = {type: 'IMMEDIATE_TOKEN'; content: Rule};
type PatternRule = {type: 'PATTERN'; value: string};
type PrecDynamicRule = {type: 'PREC_DYNAMIC'; content: Rule; value: number};
type PrecLeftRule = {type: 'PREC_LEFT'; content: Rule; value: number};
type PrecRightRule = {type: 'PREC_RIGHT'; content: Rule; value: number};
type PrecRule = {type: 'PREC'; content: Rule; value: number};
type Repeat1Rule = {type: 'REPEAT1'; content: Rule};
type RepeatRule = {type: 'REPEAT'; content: Rule};
type SeqRule = {type: 'SEQ'; members: Rule[]};
type StringRule = {type: 'STRING'; value: string};
type SymbolRule<Name extends string> = {type: 'SYMBOL'; name: Name};
type TokenRule = {type: 'TOKEN'; content: Rule};
type Rule =
| AliasRule
| BlankRule
| ChoiceRule
| FieldRule
| ImmediateTokenRule
| PatternRule
| PrecDynamicRule
| PrecLeftRule
| PrecRightRule
| PrecRule
| Repeat1Rule
| RepeatRule
| SeqRule
| StringRule
| SymbolRule<string>
| TokenRule;
type RuleOrLiteral = Rule | RegExp | string;
type GrammarSymbols<RuleName extends string> = {
[name in RuleName]: SymbolRule<name>;
} &
Record<string, SymbolRule<string>>;
type RuleBuilder<RuleName extends string> = (
$: GrammarSymbols<RuleName>,
) => RuleOrLiteral;
type RuleBuilders<
RuleName extends string,
BaseGrammarRuleName extends string
> = {
[name in RuleName]: RuleBuilder<RuleName | BaseGrammarRuleName>;
};
interface Grammar<
RuleName extends string,
BaseGrammarRuleName extends string = never,
Rules extends RuleBuilders<RuleName, BaseGrammarRuleName> = RuleBuilders<
RuleName,
BaseGrammarRuleName
>
> {
/**
* Name of the grammar language.
*/
name: string;
/** Mapping of grammar rule names to rule builder functions. */
rules: Rules;
/**
* An array of arrays of precedence names. Each inner array represents
* a *descending* ordering. Names listed earlier in one of these arrays
* have higher precedence than any names listed later in the same array.
*/
precedences?: () => String[][],
/**
* An array of arrays of rule names. Each inner array represents a set of
* rules that's involved in an _LR(1) conflict_ that is _intended to exist_
* in the grammar. When these conflicts occur at runtime, Tree-sitter will
* use the GLR algorithm to explore all of the possible interpretations. If
* _multiple_ parses end up succeeding, Tree-sitter will pick the subtree
* whose corresponding rule has the highest total _dynamic precedence_.
*
* @param $ grammar rules
*/
conflicts?: (
$: GrammarSymbols<RuleName | BaseGrammarRuleName>,
) => RuleOrLiteral[][];
/**
* An array of token names which can be returned by an _external scanner_.
* External scanners allow you to write custom C code which runs during the
* lexing process in order to handle lexical rules (e.g. Python's indentation
* tokens) that cannot be described by regular expressions.
*
* @param $ grammar rules
* @param previous array of externals from the base schema, if any
*
* @see https://tree-sitter.github.io/tree-sitter/creating-parsers#external-scanners
*/
externals?: (
$: Record<string, SymbolRule<string>>,
previous: Rule[],
) => SymbolRule<string>[];
/**
* An array of tokens that may appear anywhere in the language. This
* is often used for whitespace and comments. The default value of
* extras is to accept whitespace. To control whitespace explicitly,
* specify extras: `$ => []` in your grammar.
*
* @param $ grammar rules
*/
extras?: (
$: GrammarSymbols<RuleName | BaseGrammarRuleName>,
) => RuleOrLiteral[];
/**
* An array of rules that should be automatically removed from the
* grammar by replacing all of their usages with a copy of their definition.
* This is useful for rules that are used in multiple places but for which
* you don't want to create syntax tree nodes at runtime.
*
* @param $ grammar rules
*/
inline?: (
$: GrammarSymbols<RuleName | BaseGrammarRuleName>,
) => RuleOrLiteral[];
/**
* A list of hidden rule names that should be considered supertypes in the
* generated node types file.
*
* @param $ grammar rules
*
* @see http://tree-sitter.github.io/tree-sitter/using-parsers#static-node-types
*/
supertypes?: (
$: GrammarSymbols<RuleName | BaseGrammarRuleName>,
) => RuleOrLiteral[];
/**
* The name of a token that will match keywords for the purpose of the
* keyword extraction optimization.
*
* @param $ grammar rules
*
* @see https://tree-sitter.github.io/tree-sitter/creating-parsers#keyword-extraction
*/
word?: ($: GrammarSymbols<RuleName | BaseGrammarRuleName>) => RuleOrLiteral;
}
type GrammarSchema<RuleName extends string> = {
[K in keyof Grammar<RuleName>]: K extends 'rules'
? Record<RuleName, Rule>
: Grammar<RuleName>[K];
};
/**
* Causes the given rule to appear with an alternative name in the syntax tree.
* For instance with `alias($.foo, 'bar')`, the aliased rule will appear as an
* anonymous node, as if the rule had been written as the simple string.
*
* @param rule rule that will be aliased
* @param name target name for the alias
*/
declare function alias(rule: RuleOrLiteral, name: string): AliasRule;
/**
* Causes the given rule to appear as an alternative named node, for instance
* with `alias($.foo, $.bar)`, the aliased rule `foo` will appear as a named
* node called `bar`.
*
* @param rule rule that will be aliased
* @param symbol target symbol for the alias
*/
declare function alias(
rule: RuleOrLiteral,
symbol: SymbolRule<string>,
): AliasRule;
/**
* Creates a blank rule, matching nothing.
*/
declare function blank(): BlankRule;
/**
* Assigns a field name to the child node(s) matched by the given rule.
* In the resulting syntax tree, you can then use that field name to
* access specific children.
*
* @param name name of the field
* @param rule rule the field should match
*/
declare function field(name: string, rule: RuleOrLiteral): FieldRule;
/**
* Creates a rule that matches one of a set of possible rules. The order
* of the arguments does not matter. This is analogous to the `|` (pipe)
* operator in EBNF notation.
*
* @param options possible rule choices
*/
declare function choice(...options: RuleOrLiteral[]): ChoiceRule;
/**
* Creates a rule that matches zero or one occurrence of a given rule.
* It is analogous to the `[x]` (square bracket) syntax in EBNF notation.
*
* @param value rule to be made optional
*/
declare function optional(rule: RuleOrLiteral): ChoiceRule;
/**
* Marks the given rule with a precedence which will be used to resolve LR(1)
* conflicts at parser-generation time. When two rules overlap in a way that
* represents either a true ambiguity or a _local_ ambiguity given one token
* of lookahead, Tree-sitter will try to resolve the conflict by matching the
* rule with the higher precedence.
*
* Precedence values can either be strings or numbers. When comparing rules
* with numerical precedence, higher numbers indicate higher precedences. To
* compare rules with string precedence, Tree-sitter uses the grammar's `precedences`
* field.
*
* rules is zero. This works similarly to the precedence directives in Yacc grammars.
*
* @param value precedence weight
* @param rule rule being weighted
*
* @see https://en.wikipedia.org/wiki/LR_parser#Conflicts_in_the_constructed_tables
* @see https://docs.oracle.com/cd/E19504-01/802-5880/6i9k05dh3/index.html
*/
declare const prec: {
(value: String | number, rule: RuleOrLiteral): PrecRule;
/**
* Marks the given rule as left-associative (and optionally applies a
* numerical precedence). When an LR(1) conflict arises in which all of the
* rules have the same numerical precedence, Tree-sitter will consult the
* rules' associativity. If there is a left-associative rule, Tree-sitter
* will prefer matching a rule that ends _earlier_. This works similarly to
* associativity directives in Yacc grammars.
*
* @param value (optional) precedence weight
* @param rule rule to mark as left-associative
*
* @see https://docs.oracle.com/cd/E19504-01/802-5880/6i9k05dh3/index.html
*/
left(rule: RuleOrLiteral): PrecLeftRule;
left(value: String | number, rule: RuleOrLiteral): PrecLeftRule;
/**
* Marks the given rule as right-associative (and optionally applies a
* numerical precedence). When an LR(1) conflict arises in which all of the
* rules have the same numerical precedence, Tree-sitter will consult the
* rules' associativity. If there is a right-associative rule, Tree-sitter
* will prefer matching a rule that ends _later_. This works similarly to
* associativity directives in Yacc grammars.
*
* @param value (optional) precedence weight
* @param rule rule to mark as right-associative
*
* @see https://docs.oracle.com/cd/E19504-01/802-5880/6i9k05dh3/index.html
*/
right(rule: RuleOrLiteral): PrecRightRule;
right(value: String | number, rule: RuleOrLiteral): PrecRightRule;
/**
* Marks the given rule with a numerical precedence which will be used to
* resolve LR(1) conflicts at _runtime_ instead of parser-generation time.
* This is only necessary when handling a conflict dynamically using the
* `conflicts` field in the grammar, and when there is a genuine _ambiguity_:
* multiple rules correctly match a given piece of code. In that event,
* Tree-sitter compares the total dynamic precedence associated with each
* rule, and selects the one with the highest total. This is similar to
* dynamic precedence directives in Bison grammars.
*
* @param value precedence weight
* @param rule rule being weighted
*
* @see https://www.gnu.org/software/bison/manual/html_node/Generalized-LR-Parsing.html
*/
dynamic(value: String | number, rule: RuleOrLiteral): PrecDynamicRule;
};
/**
* Creates a rule that matches _zero-or-more_ occurrences of a given rule.
* It is analogous to the `{x}` (curly brace) syntax in EBNF notation. This
* rule is implemented in terms of `repeat1` but is included because it
* is very commonly used.
*
* @param rule rule to repeat, zero or more times
*/
declare function repeat(rule: RuleOrLiteral): RepeatRule;
/**
* Creates a rule that matches one-or-more occurrences of a given rule.
*
* @param rule rule to repeat, one or more times
*/
declare function repeat1(rule: RuleOrLiteral): Repeat1Rule;
/**
* Creates a rule that matches any number of other rules, one after another.
* It is analogous to simply writing multiple symbols next to each other
* in EBNF notation.
*
* @param rules ordered rules that comprise the sequence
*/
declare function seq(...rules: RuleOrLiteral[]): SeqRule;
/**
* Creates a symbol rule, representing another rule in the grammar by name.
*
* @param name name of the target rule
*/
declare function sym<Name extends string>(name: Name): SymbolRule<Name>;
/**
* Marks the given rule as producing only a single token. Tree-sitter's
* default is to treat each String or RegExp literal in the grammar as a
* separate token. Each token is matched separately by the lexer and
* returned as its own leaf node in the tree. The token function allows
* you to express a complex rule using the DSL functions (rather
* than as a single regular expression) but still have Tree-sitter treat
* it as a single token.
*
* @param rule rule to represent as a single token
*/
declare const token: {
(rule: RuleOrLiteral): TokenRule;
/**
* Marks the given rule as producing an immediate token. This allows
* the parser to produce a different token based on whether or not
* there are `extras` preceding the token's main content. When there
* are _no_ leading `extras`, an immediate token is preferred over a
* normal token which would otherwise match.
*
* @param rule rule to represent as an immediate token
*/
immediate(rule: RuleOrLiteral): ImmediateTokenRule;
};
/**
* Creates a new language grammar with the provided schema.
*
* @param options grammar options
*/
declare function grammar<RuleName extends string>(
options: Grammar<RuleName>,
): GrammarSchema<RuleName>;
/**
* Extends an existing language grammar with the provided options,
* creating a new language.
*
* @param baseGrammar base grammar schema to extend from
* @param options grammar options for the new extended language
*/
declare function grammar<
BaseGrammarRuleName extends string,
RuleName extends string
>(
baseGrammar: GrammarSchema<BaseGrammarRuleName>,
options: Grammar<RuleName, BaseGrammarRuleName>,
): GrammarSchema<RuleName | BaseGrammarRuleName>;

74
node_modules/tree-sitter-cli/install.js generated vendored Executable file
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@ -0,0 +1,74 @@
#!/usr/bin/env node
const fs = require('fs');
const zlib = require('zlib');
const https = require('https');
const packageJSON = require('./package.json');
// Determine the URL of the file.
const platformName = {
'darwin': 'macos',
'linux': 'linux',
'win32': 'windows'
}[process.platform];
let archName = {
'x64': 'x64',
'x86': 'x86',
'ia32': 'x86'
}[process.arch];
// ARM macs can run x64 binaries via Rosetta. Rely on that for now.
if (platformName === 'macos' && process.arch === 'arm64') {
archName = 'x64';
}
if (!platformName || !archName) {
console.error(
`Cannot install tree-sitter-cli for platform ${process.platform}, architecture ${process.arch}`
);
process.exit(1);
}
const releaseURL = `https://github.com/tree-sitter/tree-sitter/releases/download/v${packageJSON.version}`;
const assetName = `tree-sitter-${platformName}-${archName}.gz`;
const assetURL = `${releaseURL}/${assetName}`;
// Remove previously-downloaded files.
const executableName = process.platform === 'win32' ? 'tree-sitter.exe' : 'tree-sitter';
if (fs.existsSync(executableName)) {
fs.unlinkSync(executableName);
}
// Download the compressed file.
console.log(`Downloading ${assetURL}`);
const file = fs.createWriteStream(executableName);
get(assetURL, response => {
if (response.statusCode > 299) {
console.error([
'Download failed',
'',
`url: ${assetURL}`,
`status: ${response.statusCode}`,
`headers: ${JSON.stringify(response.headers, null, 2)}`,
'',
].join('\n'));
process.exit(1);
}
response.pipe(zlib.createGunzip()).pipe(file);
});
file.on('finish', () => {
fs.chmodSync(executableName, '755');
});
// Follow redirects.
function get(url, callback) {
https.get(url, response => {
if (response.statusCode === 301 || response.statusCode === 302) {
get(response.headers.location, callback);
} else {
callback(response);
}
});
}

22
node_modules/tree-sitter-cli/package.json generated vendored Normal file
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{
"name": "tree-sitter-cli",
"version": "0.20.0",
"author": "Max Brunsfeld",
"license": "MIT",
"repository": {
"type": "git",
"url": "http://github.com/tree-sitter/tree-sitter.git"
},
"description": "CLI for generating fast incremental parsers",
"keywords": [
"parser",
"lexer"
],
"main": "lib/api/index.js",
"scripts": {
"install": "node install.js"
},
"bin": {
"tree-sitter": "cli.js"
}
}

BIN
node_modules/tree-sitter-cli/tree-sitter generated vendored Executable file

Binary file not shown.

47
package-lock.json generated Normal file
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@ -0,0 +1,47 @@
{
"name": "tree-sitter-dfraw",
"version": "1.0.0",
"lockfileVersion": 2,
"requires": true,
"packages": {
"": {
"name": "tree-sitter-dfraw",
"version": "1.0.0",
"license": "ISC",
"dependencies": {
"nan": "^2.15.0"
},
"devDependencies": {
"tree-sitter-cli": "^0.20.0"
}
},
"node_modules/nan": {
"version": "2.15.0",
"resolved": "https://registry.npmjs.org/nan/-/nan-2.15.0.tgz",
"integrity": "sha512-8ZtvEnA2c5aYCZYd1cvgdnU6cqwixRoYg70xPLWUws5ORTa/lnw+u4amixRS/Ac5U5mQVgp9pnlSUnbNWFaWZQ=="
},
"node_modules/tree-sitter-cli": {
"version": "0.20.0",
"resolved": "https://registry.npmjs.org/tree-sitter-cli/-/tree-sitter-cli-0.20.0.tgz",
"integrity": "sha512-4D1qapWbJXZ5rrSUGM5rcw5Vuq/smzn9KbiFRhlON6KeuuXjra+KAtDYVrDgAoLIG4ku+jbEEGrJxCptUGi3dg==",
"dev": true,
"hasInstallScript": true,
"bin": {
"tree-sitter": "cli.js"
}
}
},
"dependencies": {
"nan": {
"version": "2.15.0",
"resolved": "https://registry.npmjs.org/nan/-/nan-2.15.0.tgz",
"integrity": "sha512-8ZtvEnA2c5aYCZYd1cvgdnU6cqwixRoYg70xPLWUws5ORTa/lnw+u4amixRS/Ac5U5mQVgp9pnlSUnbNWFaWZQ=="
},
"tree-sitter-cli": {
"version": "0.20.0",
"resolved": "https://registry.npmjs.org/tree-sitter-cli/-/tree-sitter-cli-0.20.0.tgz",
"integrity": "sha512-4D1qapWbJXZ5rrSUGM5rcw5Vuq/smzn9KbiFRhlON6KeuuXjra+KAtDYVrDgAoLIG4ku+jbEEGrJxCptUGi3dg==",
"dev": true
}
}
}

27
package.json Normal file
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{
"name": "tree-sitter-dfraw",
"version": "1.0.0",
"description": "dfraw tree-sitter parser",
"main": "bindings/node",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "Jacob Carryer",
"license": "ISC",
"dependencies": {
"nan": "^2.15.0"
},
"devDependencies": {
"tree-sitter-cli": "^0.20.0"
},
"tree-sitter": [
{
"scope": "source.dfraw",
"file-types": [
"dfraw",
"txt"
],
"first-line-regex": "[a-z_]"
}
]
}

5
parse.txt Normal file
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@ -0,0 +1,5 @@
opening_comment
[TEST:BODY_1PART] comment here
[MULTIPLE:string:123:LARGE]
[SINGLE_TEST]

5
queries/highlights.scm Normal file
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(comment) @comment
(string) @string
(number) @number
(declaration) @constant
(large) @identifier

147
src/grammar.json Normal file
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{
"name": "dfraw",
"rules": {
"source_file": {
"type": "REPEAT",
"content": {
"type": "SYMBOL",
"name": "_statement"
}
},
"_statement": {
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "bracket_statement"
},
{
"type": "SYMBOL",
"name": "comment"
}
]
},
"bracket_statement": {
"type": "SEQ",
"members": [
{
"type": "STRING",
"value": "["
},
{
"type": "SYMBOL",
"name": "parameter_list"
},
{
"type": "STRING",
"value": "]"
}
]
},
"parameter_list": {
"type": "SEQ",
"members": [
{
"type": "SYMBOL",
"name": "declaration"
},
{
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "separator"
},
{
"type": "BLANK"
}
]
},
{
"type": "REPEAT",
"content": {
"type": "SEQ",
"members": [
{
"type": "SYMBOL",
"name": "_parameter"
},
{
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "separator"
},
{
"type": "BLANK"
}
]
}
]
}
}
]
},
"_parameter": {
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "number"
},
{
"type": "SYMBOL",
"name": "large"
},
{
"type": "SYMBOL",
"name": "string"
}
]
},
"declaration": {
"type": "PATTERN",
"value": "[A-Z_\\d]+"
},
"number": {
"type": "TOKEN",
"content": {
"type": "PREC",
"value": 1,
"content": {
"type": "PATTERN",
"value": "\\d+"
}
}
},
"large": {
"type": "PATTERN",
"value": "[A-Z_\\d]+"
},
"string": {
"type": "PATTERN",
"value": "[A-Za-z ]+"
},
"separator": {
"type": "PATTERN",
"value": ":"
},
"comment": {
"type": "PATTERN",
"value": "[^\\[\\]\\s]+"
}
},
"extras": [
{
"type": "PATTERN",
"value": "\\s"
}
],
"conflicts": [],
"precedences": [],
"externals": [],
"inline": [],
"supertypes": []
}

101
src/node-types.json Normal file
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[
{
"type": "bracket_statement",
"named": true,
"fields": {},
"children": {
"multiple": false,
"required": true,
"types": [
{
"type": "parameter_list",
"named": true
}
]
}
},
{
"type": "declaration",
"named": true,
"fields": {}
},
{
"type": "large",
"named": true,
"fields": {}
},
{
"type": "parameter_list",
"named": true,
"fields": {},
"children": {
"multiple": true,
"required": true,
"types": [
{
"type": "declaration",
"named": true
},
{
"type": "large",
"named": true
},
{
"type": "number",
"named": true
},
{
"type": "separator",
"named": true
},
{
"type": "string",
"named": true
}
]
}
},
{
"type": "source_file",
"named": true,
"fields": {},
"children": {
"multiple": true,
"required": false,
"types": [
{
"type": "bracket_statement",
"named": true
},
{
"type": "comment",
"named": true
}
]
}
},
{
"type": "[",
"named": false
},
{
"type": "]",
"named": false
},
{
"type": "comment",
"named": true
},
{
"type": "number",
"named": true
},
{
"type": "separator",
"named": true
},
{
"type": "string",
"named": true
}
]

524
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#include <tree_sitter/parser.h>
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
#define LANGUAGE_VERSION 13
#define STATE_COUNT 17
#define LARGE_STATE_COUNT 2
#define SYMBOL_COUNT 17
#define ALIAS_COUNT 0
#define TOKEN_COUNT 8
#define EXTERNAL_TOKEN_COUNT 0
#define FIELD_COUNT 0
#define MAX_ALIAS_SEQUENCE_LENGTH 3
#define PRODUCTION_ID_COUNT 1
enum {
anon_sym_LBRACK = 1,
anon_sym_RBRACK = 2,
aux_sym_declaration_token1 = 3,
sym_number = 4,
sym_string = 5,
sym_separator = 6,
sym_comment = 7,
sym_source_file = 8,
sym__statement = 9,
sym_bracket_statement = 10,
sym_parameter_list = 11,
sym__parameter = 12,
sym_declaration = 13,
sym_large = 14,
aux_sym_source_file_repeat1 = 15,
aux_sym_parameter_list_repeat1 = 16,
};
static const char * const ts_symbol_names[] = {
[ts_builtin_sym_end] = "end",
[anon_sym_LBRACK] = "[",
[anon_sym_RBRACK] = "]",
[aux_sym_declaration_token1] = "declaration_token1",
[sym_number] = "number",
[sym_string] = "string",
[sym_separator] = "separator",
[sym_comment] = "comment",
[sym_source_file] = "source_file",
[sym__statement] = "_statement",
[sym_bracket_statement] = "bracket_statement",
[sym_parameter_list] = "parameter_list",
[sym__parameter] = "_parameter",
[sym_declaration] = "declaration",
[sym_large] = "large",
[aux_sym_source_file_repeat1] = "source_file_repeat1",
[aux_sym_parameter_list_repeat1] = "parameter_list_repeat1",
};
static const TSSymbol ts_symbol_map[] = {
[ts_builtin_sym_end] = ts_builtin_sym_end,
[anon_sym_LBRACK] = anon_sym_LBRACK,
[anon_sym_RBRACK] = anon_sym_RBRACK,
[aux_sym_declaration_token1] = aux_sym_declaration_token1,
[sym_number] = sym_number,
[sym_string] = sym_string,
[sym_separator] = sym_separator,
[sym_comment] = sym_comment,
[sym_source_file] = sym_source_file,
[sym__statement] = sym__statement,
[sym_bracket_statement] = sym_bracket_statement,
[sym_parameter_list] = sym_parameter_list,
[sym__parameter] = sym__parameter,
[sym_declaration] = sym_declaration,
[sym_large] = sym_large,
[aux_sym_source_file_repeat1] = aux_sym_source_file_repeat1,
[aux_sym_parameter_list_repeat1] = aux_sym_parameter_list_repeat1,
};
static const TSSymbolMetadata ts_symbol_metadata[] = {
[ts_builtin_sym_end] = {
.visible = false,
.named = true,
},
[anon_sym_LBRACK] = {
.visible = true,
.named = false,
},
[anon_sym_RBRACK] = {
.visible = true,
.named = false,
},
[aux_sym_declaration_token1] = {
.visible = false,
.named = false,
},
[sym_number] = {
.visible = true,
.named = true,
},
[sym_string] = {
.visible = true,
.named = true,
},
[sym_separator] = {
.visible = true,
.named = true,
},
[sym_comment] = {
.visible = true,
.named = true,
},
[sym_source_file] = {
.visible = true,
.named = true,
},
[sym__statement] = {
.visible = false,
.named = true,
},
[sym_bracket_statement] = {
.visible = true,
.named = true,
},
[sym_parameter_list] = {
.visible = true,
.named = true,
},
[sym__parameter] = {
.visible = false,
.named = true,
},
[sym_declaration] = {
.visible = true,
.named = true,
},
[sym_large] = {
.visible = true,
.named = true,
},
[aux_sym_source_file_repeat1] = {
.visible = false,
.named = false,
},
[aux_sym_parameter_list_repeat1] = {
.visible = false,
.named = false,
},
};
static const TSSymbol ts_alias_sequences[PRODUCTION_ID_COUNT][MAX_ALIAS_SEQUENCE_LENGTH] = {
[0] = {0},
};
static const uint16_t ts_non_terminal_alias_map[] = {
0,
};
static bool ts_lex(TSLexer *lexer, TSStateId state) {
START_LEXER();
eof = lexer->eof(lexer);
switch (state) {
case 0:
if (eof) ADVANCE(4);
if (lookahead == ':') ADVANCE(12);
if (lookahead == '[') ADVANCE(5);
if (lookahead == ']') ADVANCE(6);
if (lookahead == '\t' ||
lookahead == '\n' ||
lookahead == '\r' ||
lookahead == ' ') SKIP(0)
if (('0' <= lookahead && lookahead <= '9')) ADVANCE(9);
if (('A' <= lookahead && lookahead <= 'Z') ||
lookahead == '_') ADVANCE(8);
END_STATE();
case 1:
if (lookahead == ' ') ADVANCE(10);
if (lookahead == ':') ADVANCE(12);
if (lookahead == ']') ADVANCE(6);
if (lookahead == '_') ADVANCE(8);
if (lookahead == '\t' ||
lookahead == '\n' ||
lookahead == '\r') SKIP(1)
if (('0' <= lookahead && lookahead <= '9')) ADVANCE(9);
if (('A' <= lookahead && lookahead <= 'Z')) ADVANCE(7);
if (('a' <= lookahead && lookahead <= 'z')) ADVANCE(11);
END_STATE();
case 2:
if (lookahead == '\t' ||
lookahead == '\n' ||
lookahead == '\r' ||
lookahead == ' ') SKIP(2)
if (('0' <= lookahead && lookahead <= '9') ||
('A' <= lookahead && lookahead <= 'Z') ||
lookahead == '_') ADVANCE(8);
END_STATE();
case 3:
if (eof) ADVANCE(4);
if (lookahead == '[') ADVANCE(5);
if (lookahead == '\t' ||
lookahead == '\n' ||
lookahead == '\r' ||
lookahead == ' ') SKIP(3)
if (lookahead != 0 &&
lookahead != ']') ADVANCE(13);
END_STATE();
case 4:
ACCEPT_TOKEN(ts_builtin_sym_end);
END_STATE();
case 5:
ACCEPT_TOKEN(anon_sym_LBRACK);
END_STATE();
case 6:
ACCEPT_TOKEN(anon_sym_RBRACK);
END_STATE();
case 7:
ACCEPT_TOKEN(aux_sym_declaration_token1);
if (('0' <= lookahead && lookahead <= '9') ||
lookahead == '_') ADVANCE(8);
if (('A' <= lookahead && lookahead <= 'Z')) ADVANCE(7);
if (lookahead == ' ' ||
('a' <= lookahead && lookahead <= 'z')) ADVANCE(11);
END_STATE();
case 8:
ACCEPT_TOKEN(aux_sym_declaration_token1);
if (('0' <= lookahead && lookahead <= '9') ||
('A' <= lookahead && lookahead <= 'Z') ||
lookahead == '_') ADVANCE(8);
END_STATE();
case 9:
ACCEPT_TOKEN(sym_number);
if (('0' <= lookahead && lookahead <= '9')) ADVANCE(9);
END_STATE();
case 10:
ACCEPT_TOKEN(sym_string);
if (lookahead == ' ') ADVANCE(10);
if (('0' <= lookahead && lookahead <= '9')) ADVANCE(9);
if (('A' <= lookahead && lookahead <= 'Z')) ADVANCE(7);
if (('a' <= lookahead && lookahead <= 'z')) ADVANCE(11);
END_STATE();
case 11:
ACCEPT_TOKEN(sym_string);
if (lookahead == ' ' ||
('A' <= lookahead && lookahead <= 'Z') ||
('a' <= lookahead && lookahead <= 'z')) ADVANCE(11);
END_STATE();
case 12:
ACCEPT_TOKEN(sym_separator);
END_STATE();
case 13:
ACCEPT_TOKEN(sym_comment);
if (lookahead != 0 &&
lookahead != '\t' &&
lookahead != '\n' &&
lookahead != '\r' &&
lookahead != ' ' &&
lookahead != '[' &&
lookahead != ']') ADVANCE(13);
END_STATE();
default:
return false;
}
}
static const TSLexMode ts_lex_modes[STATE_COUNT] = {
[0] = {.lex_state = 0},
[1] = {.lex_state = 3},
[2] = {.lex_state = 1},
[3] = {.lex_state = 1},
[4] = {.lex_state = 1},
[5] = {.lex_state = 1},
[6] = {.lex_state = 1},
[7] = {.lex_state = 3},
[8] = {.lex_state = 3},
[9] = {.lex_state = 1},
[10] = {.lex_state = 1},
[11] = {.lex_state = 1},
[12] = {.lex_state = 1},
[13] = {.lex_state = 2},
[14] = {.lex_state = 3},
[15] = {.lex_state = 0},
[16] = {.lex_state = 0},
};
static const uint16_t ts_parse_table[LARGE_STATE_COUNT][SYMBOL_COUNT] = {
[0] = {
[ts_builtin_sym_end] = ACTIONS(1),
[anon_sym_LBRACK] = ACTIONS(1),
[anon_sym_RBRACK] = ACTIONS(1),
[aux_sym_declaration_token1] = ACTIONS(1),
[sym_number] = ACTIONS(1),
[sym_separator] = ACTIONS(1),
},
[1] = {
[sym_source_file] = STATE(15),
[sym__statement] = STATE(7),
[sym_bracket_statement] = STATE(7),
[aux_sym_source_file_repeat1] = STATE(7),
[ts_builtin_sym_end] = ACTIONS(3),
[anon_sym_LBRACK] = ACTIONS(5),
[sym_comment] = ACTIONS(7),
},
};
static const uint16_t ts_small_parse_table[] = {
[0] = 6,
ACTIONS(9), 1,
anon_sym_RBRACK,
ACTIONS(11), 1,
aux_sym_declaration_token1,
ACTIONS(15), 1,
sym_separator,
STATE(4), 1,
aux_sym_parameter_list_repeat1,
ACTIONS(13), 2,
sym_number,
sym_string,
STATE(11), 2,
sym__parameter,
sym_large,
[21] = 5,
ACTIONS(11), 1,
aux_sym_declaration_token1,
ACTIONS(17), 1,
anon_sym_RBRACK,
STATE(5), 1,
aux_sym_parameter_list_repeat1,
ACTIONS(13), 2,
sym_number,
sym_string,
STATE(11), 2,
sym__parameter,
sym_large,
[39] = 5,
ACTIONS(11), 1,
aux_sym_declaration_token1,
ACTIONS(17), 1,
anon_sym_RBRACK,
STATE(6), 1,
aux_sym_parameter_list_repeat1,
ACTIONS(13), 2,
sym_number,
sym_string,
STATE(11), 2,
sym__parameter,
sym_large,
[57] = 5,
ACTIONS(11), 1,
aux_sym_declaration_token1,
ACTIONS(19), 1,
anon_sym_RBRACK,
STATE(6), 1,
aux_sym_parameter_list_repeat1,
ACTIONS(13), 2,
sym_number,
sym_string,
STATE(11), 2,
sym__parameter,
sym_large,
[75] = 5,
ACTIONS(21), 1,
anon_sym_RBRACK,
ACTIONS(23), 1,
aux_sym_declaration_token1,
STATE(6), 1,
aux_sym_parameter_list_repeat1,
ACTIONS(26), 2,
sym_number,
sym_string,
STATE(11), 2,
sym__parameter,
sym_large,
[93] = 4,
ACTIONS(5), 1,
anon_sym_LBRACK,
ACTIONS(29), 1,
ts_builtin_sym_end,
ACTIONS(31), 1,
sym_comment,
STATE(8), 3,
sym__statement,
sym_bracket_statement,
aux_sym_source_file_repeat1,
[108] = 4,
ACTIONS(33), 1,
ts_builtin_sym_end,
ACTIONS(35), 1,
anon_sym_LBRACK,
ACTIONS(38), 1,
sym_comment,
STATE(8), 3,
sym__statement,
sym_bracket_statement,
aux_sym_source_file_repeat1,
[123] = 1,
ACTIONS(41), 5,
anon_sym_RBRACK,
aux_sym_declaration_token1,
sym_number,
sym_string,
sym_separator,
[131] = 1,
ACTIONS(43), 5,
anon_sym_RBRACK,
aux_sym_declaration_token1,
sym_number,
sym_string,
sym_separator,
[139] = 2,
ACTIONS(47), 1,
sym_separator,
ACTIONS(45), 4,
anon_sym_RBRACK,
aux_sym_declaration_token1,
sym_number,
sym_string,
[149] = 1,
ACTIONS(21), 4,
anon_sym_RBRACK,
aux_sym_declaration_token1,
sym_number,
sym_string,
[156] = 3,
ACTIONS(49), 1,
aux_sym_declaration_token1,
STATE(2), 1,
sym_declaration,
STATE(16), 1,
sym_parameter_list,
[166] = 1,
ACTIONS(51), 3,
ts_builtin_sym_end,
anon_sym_LBRACK,
sym_comment,
[172] = 1,
ACTIONS(53), 1,
ts_builtin_sym_end,
[176] = 1,
ACTIONS(55), 1,
anon_sym_RBRACK,
};
static const uint32_t ts_small_parse_table_map[] = {
[SMALL_STATE(2)] = 0,
[SMALL_STATE(3)] = 21,
[SMALL_STATE(4)] = 39,
[SMALL_STATE(5)] = 57,
[SMALL_STATE(6)] = 75,
[SMALL_STATE(7)] = 93,
[SMALL_STATE(8)] = 108,
[SMALL_STATE(9)] = 123,
[SMALL_STATE(10)] = 131,
[SMALL_STATE(11)] = 139,
[SMALL_STATE(12)] = 149,
[SMALL_STATE(13)] = 156,
[SMALL_STATE(14)] = 166,
[SMALL_STATE(15)] = 172,
[SMALL_STATE(16)] = 176,
};
static const TSParseActionEntry ts_parse_actions[] = {
[0] = {.entry = {.count = 0, .reusable = false}},
[1] = {.entry = {.count = 1, .reusable = false}}, RECOVER(),
[3] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_source_file, 0),
[5] = {.entry = {.count = 1, .reusable = true}}, SHIFT(13),
[7] = {.entry = {.count = 1, .reusable = true}}, SHIFT(7),
[9] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_parameter_list, 1),
[11] = {.entry = {.count = 1, .reusable = false}}, SHIFT(10),
[13] = {.entry = {.count = 1, .reusable = false}}, SHIFT(11),
[15] = {.entry = {.count = 1, .reusable = false}}, SHIFT(3),
[17] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_parameter_list, 2),
[19] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_parameter_list, 3),
[21] = {.entry = {.count = 1, .reusable = false}}, REDUCE(aux_sym_parameter_list_repeat1, 2),
[23] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_parameter_list_repeat1, 2), SHIFT_REPEAT(10),
[26] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_parameter_list_repeat1, 2), SHIFT_REPEAT(11),
[29] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_source_file, 1),
[31] = {.entry = {.count = 1, .reusable = true}}, SHIFT(8),
[33] = {.entry = {.count = 1, .reusable = true}}, REDUCE(aux_sym_source_file_repeat1, 2),
[35] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_source_file_repeat1, 2), SHIFT_REPEAT(13),
[38] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_source_file_repeat1, 2), SHIFT_REPEAT(8),
[41] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_declaration, 1),
[43] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_large, 1),
[45] = {.entry = {.count = 1, .reusable = false}}, REDUCE(aux_sym_parameter_list_repeat1, 1),
[47] = {.entry = {.count = 1, .reusable = false}}, SHIFT(12),
[49] = {.entry = {.count = 1, .reusable = true}}, SHIFT(9),
[51] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_bracket_statement, 3),
[53] = {.entry = {.count = 1, .reusable = true}}, ACCEPT_INPUT(),
[55] = {.entry = {.count = 1, .reusable = true}}, SHIFT(14),
};
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _WIN32
#define extern __declspec(dllexport)
#endif
extern const TSLanguage *tree_sitter_dfraw(void) {
static const TSLanguage language = {
.version = LANGUAGE_VERSION,
.symbol_count = SYMBOL_COUNT,
.alias_count = ALIAS_COUNT,
.token_count = TOKEN_COUNT,
.external_token_count = EXTERNAL_TOKEN_COUNT,
.state_count = STATE_COUNT,
.large_state_count = LARGE_STATE_COUNT,
.production_id_count = PRODUCTION_ID_COUNT,
.field_count = FIELD_COUNT,
.max_alias_sequence_length = MAX_ALIAS_SEQUENCE_LENGTH,
.parse_table = &ts_parse_table[0][0],
.small_parse_table = ts_small_parse_table,
.small_parse_table_map = ts_small_parse_table_map,
.parse_actions = ts_parse_actions,
.symbol_names = ts_symbol_names,
.symbol_metadata = ts_symbol_metadata,
.public_symbol_map = ts_symbol_map,
.alias_map = ts_non_terminal_alias_map,
.alias_sequences = &ts_alias_sequences[0][0],
.lex_modes = ts_lex_modes,
.lex_fn = ts_lex,
};
return &language;
}
#ifdef __cplusplus
}
#endif

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#ifndef TREE_SITTER_PARSER_H_
#define TREE_SITTER_PARSER_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#define ts_builtin_sym_error ((TSSymbol)-1)
#define ts_builtin_sym_end 0
#define TREE_SITTER_SERIALIZATION_BUFFER_SIZE 1024
typedef uint16_t TSStateId;
#ifndef TREE_SITTER_API_H_
typedef uint16_t TSSymbol;
typedef uint16_t TSFieldId;
typedef struct TSLanguage TSLanguage;
#endif
typedef struct {
TSFieldId field_id;
uint8_t child_index;
bool inherited;
} TSFieldMapEntry;
typedef struct {
uint16_t index;
uint16_t length;
} TSFieldMapSlice;
typedef struct {
bool visible;
bool named;
bool supertype;
} TSSymbolMetadata;
typedef struct TSLexer TSLexer;
struct TSLexer {
int32_t lookahead;
TSSymbol result_symbol;
void (*advance)(TSLexer *, bool);
void (*mark_end)(TSLexer *);
uint32_t (*get_column)(TSLexer *);
bool (*is_at_included_range_start)(const TSLexer *);
bool (*eof)(const TSLexer *);
};
typedef enum {
TSParseActionTypeShift,
TSParseActionTypeReduce,
TSParseActionTypeAccept,
TSParseActionTypeRecover,
} TSParseActionType;
typedef union {
struct {
uint8_t type;
TSStateId state;
bool extra;
bool repetition;
} shift;
struct {
uint8_t type;
uint8_t child_count;
TSSymbol symbol;
int16_t dynamic_precedence;
uint16_t production_id;
} reduce;
uint8_t type;
} TSParseAction;
typedef struct {
uint16_t lex_state;
uint16_t external_lex_state;
} TSLexMode;
typedef union {
TSParseAction action;
struct {
uint8_t count;
bool reusable;
} entry;
} TSParseActionEntry;
struct TSLanguage {
uint32_t version;
uint32_t symbol_count;
uint32_t alias_count;
uint32_t token_count;
uint32_t external_token_count;
uint32_t state_count;
uint32_t large_state_count;
uint32_t production_id_count;
uint32_t field_count;
uint16_t max_alias_sequence_length;
const uint16_t *parse_table;
const uint16_t *small_parse_table;
const uint32_t *small_parse_table_map;
const TSParseActionEntry *parse_actions;
const char * const *symbol_names;
const char * const *field_names;
const TSFieldMapSlice *field_map_slices;
const TSFieldMapEntry *field_map_entries;
const TSSymbolMetadata *symbol_metadata;
const TSSymbol *public_symbol_map;
const uint16_t *alias_map;
const TSSymbol *alias_sequences;
const TSLexMode *lex_modes;
bool (*lex_fn)(TSLexer *, TSStateId);
bool (*keyword_lex_fn)(TSLexer *, TSStateId);
TSSymbol keyword_capture_token;
struct {
const bool *states;
const TSSymbol *symbol_map;
void *(*create)(void);
void (*destroy)(void *);
bool (*scan)(void *, TSLexer *, const bool *symbol_whitelist);
unsigned (*serialize)(void *, char *);
void (*deserialize)(void *, const char *, unsigned);
} external_scanner;
};
/*
* Lexer Macros
*/
#define START_LEXER() \
bool result = false; \
bool skip = false; \
bool eof = false; \
int32_t lookahead; \
goto start; \
next_state: \
lexer->advance(lexer, skip); \
start: \
skip = false; \
lookahead = lexer->lookahead;
#define ADVANCE(state_value) \
{ \
state = state_value; \
goto next_state; \
}
#define SKIP(state_value) \
{ \
skip = true; \
state = state_value; \
goto next_state; \
}
#define ACCEPT_TOKEN(symbol_value) \
result = true; \
lexer->result_symbol = symbol_value; \
lexer->mark_end(lexer);
#define END_STATE() return result;
/*
* Parse Table Macros
*/
#define SMALL_STATE(id) id - LARGE_STATE_COUNT
#define STATE(id) id
#define ACTIONS(id) id
#define SHIFT(state_value) \
{{ \
.shift = { \
.type = TSParseActionTypeShift, \
.state = state_value \
} \
}}
#define SHIFT_REPEAT(state_value) \
{{ \
.shift = { \
.type = TSParseActionTypeShift, \
.state = state_value, \
.repetition = true \
} \
}}
#define SHIFT_EXTRA() \
{{ \
.shift = { \
.type = TSParseActionTypeShift, \
.extra = true \
} \
}}
#define REDUCE(symbol_val, child_count_val, ...) \
{{ \
.reduce = { \
.type = TSParseActionTypeReduce, \
.symbol = symbol_val, \
.child_count = child_count_val, \
__VA_ARGS__ \
}, \
}}
#define RECOVER() \
{{ \
.type = TSParseActionTypeRecover \
}}
#define ACCEPT_INPUT() \
{{ \
.type = TSParseActionTypeAccept \
}}
#ifdef __cplusplus
}
#endif
#endif // TREE_SITTER_PARSER_H_

33
test/corpus/test.txt Normal file
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@ -0,0 +1,33 @@
=============
General Test
=============
opening_comment
[TEST:BODY_1PART] comment here
[MULTIPLE:string:123:LARGE]
[SINGLE_TEST]
---
(source_file
(comment)
(bracket_statement
(parameter_list
(declaration)
(separator)
(large)))
(comment)
(comment)
(bracket_statement
(parameter_list
(declaration)
(separator)
(string)
(separator)
(number)
(separator)
(large)))
(bracket_statement
(parameter_list
(declaration))))