From b56169c26240db1b1cff3c6f65a34b7516a9fc15 Mon Sep 17 00:00:00 2001 From: Xavier Noria Date: Sat, 13 Jun 2009 12:46:09 +0200 Subject: moves reopening of core classes to add generic stuff from Action Pack to AS/core_ext and adds tests [#2798 state:committed] Signed-off-by: Jeremy Kemper --- .../lib/active_support/core_ext/regexp.rb | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 activesupport/lib/active_support/core_ext/regexp.rb (limited to 'activesupport/lib/active_support/core_ext/regexp.rb') diff --git a/activesupport/lib/active_support/core_ext/regexp.rb b/activesupport/lib/active_support/core_ext/regexp.rb new file mode 100644 index 0000000000..1a04c70d87 --- /dev/null +++ b/activesupport/lib/active_support/core_ext/regexp.rb @@ -0,0 +1,25 @@ +class Regexp #:nodoc: + def number_of_captures + Regexp.new("|#{source}").match('').captures.length + end + + def multiline? + options & MULTILINE == MULTILINE + end + + class << self + def optionalize(pattern) + case unoptionalize(pattern) + when /\A(.|\(.*\))\Z/ then "#{pattern}?" + else "(?:#{pattern})?" + end + end + + def unoptionalize(pattern) + [/\A\(\?:(.*)\)\?\Z/, /\A(.|\(.*\))\?\Z/].each do |regexp| + return $1 if regexp =~ pattern + end + return pattern + end + end +end -- cgit v1.2.3