Class: Rack::Mount::Strexp

Inherits:
Regexp
  • Object
show all
Defined in:
lib/rack/mount/strexp.rb

Instance Method Summary collapse

Constructor Details

#initialize(str, requirements = {}, separators = []) ⇒ Strexp

Parses segmented string expression and converts it into a Regexp

Strexp.compile('foo')
  # => %r{\Afoo\Z}

Strexp.compile('foo/:bar', {}, ['/'])
  # => %r{\Afoo/(?<bar>[^/]+)\Z}

Strexp.compile(':foo.example.com')
  # => %r{\A(?<foo>.+)\.example\.com\Z}

Strexp.compile('foo/:bar', {:bar => /[a-z]+/}, ['/'])
  # => %r{\Afoo/(?<bar>[a-z]+)\Z}

Strexp.compile('foo(.:extension)')
  # => %r{\Afoo(\.(?<extension>.+))?\Z}

Strexp.compile('src/*files')
  # => %r{\Asrc/(?<files>.+)\Z}



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# File 'lib/rack/mount/strexp.rb', line 24

def initialize(str, requirements = {}, separators = [])
  return super(str) if str.is_a?(Regexp)

  requirements = requirements ? requirements.dup : {}
  normalize_requirements!(requirements, separators)

  parser = StrexpParser.new
  parser.requirements = requirements

  begin
    re = parser.scan_str(str)
  rescue Racc::ParseError => e
    raise RegexpError, e.message
  end

  super(re)
end