Class: Regexp

Class | Regexp
In: | lib/core/facets/regexp/arity.rb lib/core/facets/regexp/to_re.rb
Parent: | Object

### Methods

arity to_re to_regexp

### Public Instance methods

arity()

Returns the number of backreferencing subexpressions.

      /(a)(b)(c)/.arity  #=> 3
      /(a(b(c)))/.arity  #=> 3

Note that this is not perfect, especially with regards to \x and embedded comments.

CREDIT: Trans

[Source]

    # File lib/core/facets/regexp/arity.rb, line 13
      def arity
        source.scan( /(?!\\)[(](?!\?[#=:!>-imx])/ ).length
      end

to_re(esc=false)

Simply returns itself. Helpful when converting strings to regular expressions, where regexp might occur as well —in the same vien as using to_s on symbols. The parameter is actaully a dummy parameter to coincide with String#to_re.

      /abc/.to_re  #=> /abc/

CREDIT: Trans

[Source]

    # File lib/core/facets/regexp/to_re.rb, line 24
      def to_re(esc=false)
        self  # Of course, things really should know how to say "I" ;)
      end

to_regexp()

Like to_re, but following Ruby‘s formal definitions, only a Regular expression type object will respond to this.

Note that to be of much real use this should be defined in core Ruby.

CREDIT: Florian Gross

[Source]

    # File lib/core/facets/regexp/to_re.rb, line 10
      def to_regexp
        self
      end

[Validate]