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Regular expression support for the Fabulator engine.
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README.markdown

Fabulator Grammar Extension

This extension provides basic support for regular expressions modeled loosely after Perl 6 grammars.

For now, this extension provides a single function: 'match(regex, string)'.
This function returns true or false depending on whether or not the regular expression matches the given string.

The current implementation compiled regular expressions into Ruby RegExp objects for faster execution. This may change as new capabilities are added that might not be supportable by pure Ruby regular expressions.

The goal of the grammar extension is to provide a rich environment for writing parsers that can be integrated into the Fabulator environment.

Namespace: "http://dh.tamu.edu/ns/fabulator/grammar/1.0#"

Regular Expressions

The following characters are considered special and should be escaped if you are not using for their special meaning:

Parenthesis ( ) Brackets [ ] Curly Brackets { } Angle Brackets < > Dot . Question ? Caret ^ Dollar $ Asterisk * Plus +

Additionally, the hyphen '-' should be the first character in a character class if it is matching itself instead of indicated a range. It can not be used as either the beginning or end of a range at present.

Whitespace can separate tokens in the regular expression, but the amount of Whitespace is not significant. All tokens assume the possible existance of whitespace in the string being matched and will not fail due to the whitespace being there.

LICENSE:

Copyright (c) 2010 Texas A&M University

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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