You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

David Majda 86769a6c5c Error handling: Make |?| return |null| on unsuccessful match ... Before this commit, the |?| operator returned an empty string upon unsuccessful match. This commit changes the returned value to |null|. It also updates the PEG.js grammar and the example grammars, which used the value returned by |?| quite often. Returning |null| is possible because it no longer indicates a match failure. I expect that this change will simplify many real-world grammars, as an empty string is almost never desirable as a return value (except some lexer-level rules) and it is often translated into |null| or some other value in action code. Implements part of #198.		11 years ago
..
generate-bytecode.js	Error handling: Make |?| return |null| on unsuccessful match	11 years ago
generate-javascript.js	Error handling: Use a special value (not |null|) to indicate failure	11 years ago
remove-proxy-rules.js	Move options handling from passes to |PEG.compiler.compile|	11 years ago
report-left-recursion.js	Make |GrammarError| require work also in the browser version	11 years ago
report-missing-rules.js	Make |GrammarError| require work also in the browser version	11 years ago