Regular expressions - regex

code is usually text.
Parsing code - getting a model view of your source.


Regular Expression Library
GotDotNet User Sample: Regular Expression Workbench (V2.00)
The absolute bare minimum every programmer should know about regular expressions
The Regulator
15 PHP regular expressions for web developers
A regex crossword (PDF)
JavaScript Regular Expression Enlightenment - Tech.Pro
Regular Expressions in C++ | Dr Dobb's
Oniguruma - Oniguruma is a regular expressions library. The characteristics of this library is that different character encoding for every regular expression object can be specified. k-takata/Onigmo
The true power of regular expressions

Chomsky hierarchy:

/-------------------------------------------\
|                                           |
|     Recursively enumerable languages      | Type 0
|                                           |
|   /-----------------------------------\   |
|   |                                   |   |
|   |    Context-sensitive languages    |   | Type 1
|   |                                   |   |
|   |   /---------------------------\   |   |
|   |   |                           |   |   |
|   |   |  Context-free languages   |   |   | Type 2
|   |   |                           |   |   |
|   |   |   /-------------------\   |   |   |
|   |   |   | Regular languages |   |   |   | Type 3
|   |   |   \-------------------/   |   |   |
|   |   \---------------------------/   |   |
|   \-----------------------------------/   |
\-------------------------------------------/

Rx: A Regex Debugger for Perl - Lexical Instrumentation of Regexes by Mark-Jason Dominus
The Marpa parser Ocean of Awareness
MarpaX-Languages-C-AST-0.32 - Translate a C source to an AST - metacpan.org - Perl programming language
REX: XML Shallow Parsing with Regular Expressions
Regexp::Grammars - Add grammatical parsing features to Perl 5.10 regexes - metacpan.org - adds a small number of new regex constructs that can be used within Perl 5.10 patterns to implement complete recursive-descent parsing.

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