emacs-pcre2el 1.8-1.0b5b2a2 Convert between PCRE, Emacs and rx regexp syntax

pcre2el or rxt (RegeXp Translator or RegeXp Tools) is a utility for working with regular expressions in Emacs, based on a recursive-descent parser for regexp syntax. In addition to converting (a subset of) PCRE syntax into its Emacs equivalent, it can do the following:

  • convert Emacs syntax to PCRE

  • convert either syntax to rx, an S-expression based regexp syntax

  • untangle complex regexps by showing the parse tree in rx form and highlighting the corresponding chunks of code

  • show the complete list of strings (productions) matching a regexp, provided the list is finite

  • provide live font-locking of regexp syntax (so far only for Elisp buffers – other modes on the TODO list).