bodil/graham

Parser combinators for JS

{
  "createdAt": "2015-01-06T17:24:34Z",
  "defaultBranch": "master",
  "description": "Parser combinators for JS",
  "fullName": "bodil/graham",
  "homepage": null,
  "language": "JavaScript",
  "name": "graham",
  "pushedAt": "2015-08-25T16:04:27Z",
  "stargazersCount": 13,
  "topics": [],
  "updatedAt": "2024-09-22T14:47:04Z",
  "url": "https://github.com/bodil/graham"
}

Graham

A Javascript port of the parser combinator library from Graham Hutton’s Programming in Haskell.

Usage

$ npm install --save graham

var p = require("graham");

var myLittleParser = p.either(
  p.seq(p.string("left "), (_) => p.seq(p.num,
    (n) => p.ret({ "left": n }))),
  p.seq(p.string("right "), (_) => p.seq(p.num,
    (n) => p.ret({ "right": n })))
);

p.parse(myLittleParser, "left 123");
// == [{"left": 123}, ""]

p.parse(myLittleParser, "right 456");
// == [{"right": 456}, ""]

p.parse(myLittleParser, "left lol");
// == null

p.parse(myLittleParser, "right 123lol");
// == [{"right": 123}, "lol"]

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this program. If not, see http://www.gnu.org/licenses/.