Parse a string optionally.
Maybe<a> optional( Parser<a> parse, var ParseState st )
parse The parser to use
st The current parsing state
Parse a string optionally, returning nothing if the parser failed.
Kaya standard library by Edwin Brady, Chris Morris and others ([email protected]). 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.