# Code Review: Regex2

**URL:** <https://www.ruby-forum.com/t/code-review-regex2/138613>\
**Category:** IronRuby\
**Created:** [May 25, 2008, 10:14pm UTC](https://www.ruby-forum.com/t/code-review-regex2/138613 "2008-05-25T22:14:06Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![grujildo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/94ad74/32.png) [@grujildo](https://www.ruby-forum.com/u/grujildo)\
**Post date:** [May 25, 2008, 10:14pm UTC](https://www.ruby-forum.com/t/code-review-regex2/138613/1 "2008-05-25T22:14:06Z")

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tfpt review “/shelveset:Regex2;REDMOND\tomat”

Implements regex pattern rewriter: some escape sequences that are valid  
in Ruby are not valid in .NET regex and need to fixed in the pattern.

Rough implementation of Regexp::union, will finish it next checkin.

Fixes bugs:  
[ironruby-Bugs-20205] Regexp - unexpected escape sequence \_  
[ironruby-Bugs-20275] raise vararg overloads not implemented

Fixes TCPServer to allow accept w/o previous select.

Tomas