Parse::or

Parser<a> or( Parser<a> x, Parser<a> y )

x The first parser

y The second parser

Create a new parser combining x and y
The new parser recognises a string which is recognised by either x or y.

decimal = or(Parse::digit,Parse::char@('.'));
// may be more clear in many situations to write this as
decimal = Parse::digit `or` Parse::char@('.');

As with Kaya's || operator, this uses short-circuit evaluation: if x parses the String successfully, y will not be used.

Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation.