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

Copyright 2014 Bodil Stokke

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/.