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Shift Parser

About

This module provides an ECMAScript parser that produces a Shift format AST.

Status

Stable.

The parser supports version 6 (release candidate 2) of the ECMA-262 standard.

Installation

npm install shift-parser

Usage

import parse from "shift-parser";
let ast = parse("/* ECMAScript program text */");
import {parseScript, parseModule} from "shift-parser";
let scriptAST = parseScript("/* ECMAScript Script text */");
let moduleAST = parseModule("/* ECMAScript Module text */");

Or in node.js:

var parseScript = require("shift-parser").parseScript;
var scriptAST = parseScript("/* ECMAScript Script text */");

Location information is available in environments which support WeakMap via an alternative interface:

let {parseScriptWithLocation, parseModuleWithLocation} = require("shift-parser");
let {tree, locations, comments} = parseScriptWithLocation("2 + 3 /* = 5 */");
let threeNode = tree.statements[0].expression.right;
locations.get(threeNode); // { start: { line: 1, column: 4, offset: 4 }, end: { line: 1, column: 5, offset: 5 } }
comments; // [ { text: ' = 5 ', type: 'MultiLine', start: { line: 1, column: 6, offset: 6 }, end: { line: 1, column: 15, offset: 15 } } ]

Contributing

  • Open a Github issue with a description of your desired change. If one exists already, leave a message stating that you are working on it with the date you expect it to be complete.
  • Fork this repo, and clone the forked repo.
  • Install dependencies with npm install.
  • Build and test in your environment with npm run build && npm test.
  • Create a feature branch. Make your changes. Add tests.
  • Build and test in your environment with npm run build && npm test.
  • Make a commit that includes the text "fixes #XX" where XX is the Github issue.
  • Open a Pull Request on Github.

License

Copyright 2014 Shape Security, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.