===== Overview =====

[[http://www.pcre.org|PCRE web site]], a Perl-compatible regular expression library.

===== Case Studies =====

===== Gotchas =====
  * Regular expressions that require backreferences can result in exponential runtime complexity.
  * Earlier versions like the one that Apple uses in their WebKit library have fairly broken behavior when faced with regular expressions that contain Unicode characters.

===== Tips & Tricks =====

===== Alternatives =====
  * Use more simple string prefix, suffix and separation tools. ('Some people, when confronted with a problem, think "I know, I'll use regular expressions." Now they have two problems.' -- [[http://groups.google.com/group/comp.emacs.xemacs/browse_frm/thread/b21dbf075be84ab/989698966fb25e7a?hl=en#989698966fb25e7a|jwz]])

===== Other Resources ====