README.md

HxRE

Pure Haxe implementation of regular expression engine.

This library is based on libregex.

Haxe's macro facility is used to provide compile-time specialization of the regex virtual machine.

CAUTION: This is an experimental implementation. DO NOT USE THIS FOR PRODUCTS.

Usage

@:build(hxre.Specializer.build("(\\d{4})-(\\d{2})-(\\d{2})"))
class SpecialRegex extends hxre.NfaVM {}

class Main {
    public static function main() {
        // dynamic compiled regex
        var re = new hxre.Regex("(\\d{2}):(\\d{2})");
        trace(re.exec("2014-11-20T12:00Z"));

        // static compiled regex
        trace(SpecialRegex.regex.exec("Date: 2014-11-30"));

        // static regex is also able to create new instances
        var sre : hxre.Regex = new SpecialRegex();
        trace(sre.exec("2014-12-31T12:00Z"));
    }
}

Implemented Features

• basic composites and repetitions ab*|c+|d?|e{2,4}
• ungreedy repetitions <.+?>
• numbered capture group (abc)
• non-capturing group (?:abc)

TODO

• extended hexadecimal escape sequence \x{10FFFF}
• character class [abcABC0-9]
• ASCII character class [:digit:]
• Perl character class \w
• Unicode character class \p{Han}
• case insensitive mode
• multiline mode
• global mode
• named capture group
• API refinement