Talk:Comparison of regular expression engines: Difference between revisions

Revision as of 10:51, 9 February 2019

Revision as of 21:47, 12 October 2019

Line 103:

{{reflist-talk}}

== Engines could be categorized ==

- There are official types of engines: DFA / NFA with the distinction Traditional NFA, Posix NFA (see. [https://www.oreilly.com/library/view/mastering-regular-expressions/0596528124/ch04.html Mastering Regular Expressions, 3rd Edition by Jeffrey E.F. Friedl, chapter 4])

- And there is a strong grouping of Perl compatibility (which drove regex developments some years ago). Perl 5.005 introduced new features ([https://perldoc.perl.org/perl5005delta.html#Regular-Expressions Perl 5.005 Regular Expression improvements]) like Lookbehinds, Conditional Expressions, Atomic Groups. Perl 5.10 introduced other new features ([https://perldoc.perl.org/perl5100delta.html#Regular-expressions Perl 5.1 Regular Expression improvements]) many years later like Named Capture Buffers, Possessive Quantifiers, Relative Backreferences, \K, among others. The regex engine in version 5.10 was developed in collaboration with the PCRE project, the most interesting features were added beween 1997 and 2007 ([https://www.rexegg.com/pcre-documentation.html Curated PCRE history]).

As Perl is/was the defacto standard for regex, most of the engines in this Wikipedia article have a grammar and feature clearly set before the Perl 5.005 release, between Perl 5.005 and 5.10, or after Perl 5.10.

Sebastian --[[Special:Contributions/88.217.185.170|88.217.185.170]] ([[User talk:88.217.185.170|talk]]) 21:47, 12 October 2019 (UTC)