Graham

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

Usage

``sh
$ npm install --save graham
`

`typescript
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
.