String#to_regexp

to_regexp.rb

#
# DEPRECATED - and probably broken
# use to_regexp gem instead
# https://github.com/seamusabshere/to_regexp
# https://rubygems.org/gems/to_regexp
#

class String
  REGEXP_DELIMITERS = {
    '%r{' => '}',
    '/' => '/'
  }

  def to_regexp
    str = self.dup
    delim_start, delim_end = REGEXP_DELIMITERS.detect { |k, v| str.start_with? k }.map { |delim| ::Regexp.escape delim }
    %r{\A#{delim_start}(.*)#{delim_end}([^#{delim_end}]*)\z} =~ str.strip
    content = $1
    options = $2
    content.gsub! '\\/', '/'
    ignore_case = options.include?('i') ? ::Regexp::IGNORECASE : nil
    multiline = options.include?('m') ? ::Regexp::MULTILINE : nil
    extended = options.include?('x') ? ::Regexp::EXTENDED : nil
    ::Regexp.new content, (ignore_case|multiline|extended)
  end
end

class Regexp
  def to_regexp
    dup
  end
end