JSで書かれたECMAScript RegExpパーサーの比較 | Memory ice cubes
OXCで正規表現パーサーを実装してるときに全部一通り読んでみて、みんな違ってみんな良いってなったので。 候補はこちらの3つ。 https://github.com/jviereck/regjsparser https://github.com/DmitrySoshnikov/regexp-tree https://github.com/eslint-community/regexpp かのAST Explorerでも、RegExp部門ではこの3つがリストにある。 AST explorer https://astexplorer.net/ 前提 ECMAScript本体だと、ESTreeというデファクトがあるけど、残念ながらRegExpにはない。 ESTreeでのRegExpの扱いはこんな感じで、ただの文字列でしかない。 interface RegExpLiteral <: Literal
GitHub - coderaiser/putout: 🐊 Pluggable and configurable JavaScript Linter, code transformer and formatter, drop-in ESLint superpower replacement 💪 with built-in support for js, jsx typescript, flow, markdown, yaml and json. Write declarative codemods i
Perfection is finally attained not when there is no longer anything to add, but when there is no longer anything to take away. (c) Antoine de Saint Exupéry 🐊Putout is a JavaScript Linter, pluggable and configurable code transformer, drop-in ESLint replacement with built-in code printer. It has a lot of transformations that keeps your codebase in a clean state, removing any code smell and making c
Regenerator, AST, and ES6 at Facebook (Tech Talk by Ben Newman)
See the full post here: http://www.hakkalabs.co/articles/ecmascript-6-at-facebook Ben Newman (Engineer, Facebook) has spent many months creating Regenerator which brings support for ES6 style generators to your code. In this popular talk, Ben will talk about what led him to create Regenerator, show us what it can do today, and talk about where it's going in the future. This talk was presented at
Parsing in JavaScript: all the tools and libraries you can use
Receive the guide to your inbox to read it on all your devices when you have time. Learn about parsing in Java, Python, C#, and JavaScript Use An Existing Library The first option is the best for well known and supported languages, like XML or HTML. A good library usually include also API to programmatically build and modify documents in that language. This is typically more of what you get from a
ESTree 互換っぽい AST を出力する JavaScript のパーサーまとめ
ESTree という JavaScript の AST の仕様がある。ESTree っぽいものを出力してくれるパーサーをまとめていく。 雑にまとめているので興味ある人とか詳しい人は適当に追記してもらって構いません。 @babel/parser Babel で使われているパーサー。最新の JavaScript だけでなく、まだ ECMAScript に入っていないプロポーザルや TypeScript、Flow もオプションで対応している。また、AST は ESTree と一部互換性がないものを出力するが、estree プラグインを使うことで、ESTree 互換の AST を出力させることもできる。 Prettier のデフォルトパーサー。@babel/eslint-parserを使うことで ESLint のパーサーとしても使うことができる。 @typescript-eslint/typesc
GitHub - geut/jsdast: JSDoc Abstract Syntax Tree
const unified = require('unified') const { parser } = require('@geut/jsdast') const tree = unified().use(parser).parse(` /** * @param {number} a * @param {number} b * @returns {number} */ function sum(a, b) { return a + b } `) console.log(JSON.stringify(tree, null, 2)) /* { "type": "Root", "children": [ { "type": "Module", "name": "Index", "doc": { "description": "", "tags": [] }, "children": [ {
Lezer
The Lezer Parser System The problem of parsing structured text has resisted one-size-fits all solutions for over 60 years. Lezer isn't such a solution either, but it is a very decent parser generator, especially well suited for use in code editors. Lezer (the Dutch word for reader, pronounced like “laser”) provides a parser generator that outputs JavaScript modules, which can be loaded to parse co
GitHub - pvdz/tenko: An 100% spec compliant ES2021 JavaScript parser written in JS
import {Tenko, GOAL_MODULE, COLLECT_TOKENS_ALL} from 'src/index.mjs'; const { ast, // estree compatible AST tokens, // array of numbers (see Lexer) tokenCountSolid, // number of non-whitespace tokens tokenCountAny, // number of tokens of any kind } = Tenko( inputCode, // string { // Parse with script or module goal (module allows import/export) goalMode = GOAL_MODULE, // GOAL_MODULE | GOAL_SCRIPT
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