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ecma262-jison

v0.3.0-alpha.2

Published

ecma262 implementation in jison

Downloads

18

Readme

ECMA262-JISON

用js的Lex/Yacc工具来实现和扩展ECMAScript规范,学习ECMAScript规范并尝试打造一个parser。

Nothing increases your learning power more than working on something big, real, confusing and frustrating.

安装


npm install ecma262-jison

构建

Nodejs v6版本以上,推荐使用v8或更高版本


git clone https://github.com/w-y/ecma262-jison.git

构建parser:


npm run buildparser

src到lib:


npm run build

测试:


npm run test

特性

目前已实现ECMAScript(7.0)的大部分语法特性,并扩展了JSX支持

| 特性 | 支持 | 备注 | | ---------- | --- | --- | | Arrows | ✅ | | | Classes | ✅ | | | Template Strings | ✅ |foo`` ❌ | | Destructuring | ✅ | | | Default+Rest+Spread | ✅ | | | Let + Const | ✅ | | | Unicode | ✅ | \u{20BB7} ❌| | Modules | ✅ | | | Enhanced Object Literals | ✅ | | | Generators | ❌ | | | jsx | ✅ | | | Spread Element | ✅ | | | Spread Property | ✅ | | | ASI                       | ✅ | 出错加分号重试方式 |

示例

const code = 'foo;';

const parser = require('ecma262-jison');

const ast = parser.parse(code);

console.log(JSON.stringify(ast, null, 2));

在线示例