module ToRegex::StringMixin
Constants
- INLINE_OPTIONS
- REGEXP_DELIMITERS
Public Class Methods
literal?(str)
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# File lib/wayback_machine_downloader/to_regex.rb, line 4 def literal?(str) REGEXP_DELIMITERS.none? { |s, e| str.start_with?(s) and str =~ /#{e}#{INLINE_OPTIONS}\z/ } end
Public Instance Methods
as_regexp(options = {})
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Return arguments that can be passed to `Regexp.new` @see to_regexp
# File lib/wayback_machine_downloader/to_regex.rb, line 34 def as_regexp(options = {}) unless options.is_a?(::Hash) raise ::ArgumentError, "[to_regexp] Options must be a Hash" end str = self return if options[:detect] and str == '' if options[:literal] or (options[:detect] and ToRegexp::String.literal?(str)) content = ::Regexp.escape str elsif delim_set = REGEXP_DELIMITERS.detect { |k, _| str.start_with?(k) } delim_start, delim_end = delim_set /\A#{delim_start}(.*)#{delim_end}(#{INLINE_OPTIONS})\z/u =~ str content = $1 inline_options = $2 return unless content.is_a?(::String) content.gsub! '\\/', '/' if inline_options options[:ignore_case] = true if inline_options.include?('i') options[:multiline] = true if inline_options.include?('m') options[:extended] = true if inline_options.include?('x') # 'n', 'N' = none, 'e', 'E' = EUC, 's', 'S' = SJIS, 'u', 'U' = UTF-8 options[:lang] = inline_options.scan(/[nesu]/i).join.downcase end else return end ignore_case = options[:ignore_case] ? ::Regexp::IGNORECASE : 0 multiline = options[:multiline] ? ::Regexp::MULTILINE : 0 extended = options[:extended] ? ::Regexp::EXTENDED : 0 lang = options[:lang] || '' if ::RUBY_VERSION > '1.9' and lang.include?('u') lang = lang.delete 'u' end if lang.empty? [ content, (ignore_case|multiline|extended) ] else [ content, (ignore_case|multiline|extended), lang ] end end
to_regex(options = {})
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Get a regex back
Without :literal or :detect, `“foo”.to_regex` will return nil.
@param [optional, Hash] options @option options [true,false] :literal Treat meta characters and other regexp codes as just text; always return a regexp @option options [true,false] :detect If string starts and ends with valid regexp delimiters, treat it as a regexp; otherwise, interpret it literally @option options [true,false] :ignore_case /foo/i @option options [true,false] :multiline /foo/m @option options [true,false] :extended /foo/x @option options [true,false] :lang /foo/
# File lib/wayback_machine_downloader/to_regex.rb, line 26 def to_regex(options = {}) if args = as_regexp(options) ::Regexp.new(*args) end end