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Class: ActionDispatch::Journey::Scanner

Do not use. This class is for internal use only.
Relationships & Source Files
Inherits: Object
Defined in: actionpack/lib/action_dispatch/journey/scanner.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new ⇒ Scanner

[ GitHub ] 

  


# File 'actionpack/lib/action_dispatch/journey/scanner.rb', line 8



def initialize
  @ss = nil
end


  







Instance Attribute Details



  

    #eos?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/journey/scanner.rb', line 16



def eos?
  @ss.eos?
end


  







Instance Method Details



  

    #dedup_scan(regex)   (private)
  



  

    

takes advantage of ::String @- deduping capabilities in Ruby 2.5 upwards see: bugs.ruby-lang.org/issues/13077


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/journey/scanner.rb', line 38



def dedup_scan(regex)
  r = @ss.scan(regex)
  r ? -r : nil
end


  








  

    #next_token  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/journey/scanner.rb', line 28



def next_token
  return if @ss.eos?

  until token = scan || @ss.eos?; end
  token
end


  








  

    #pos  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/journey/scanner.rb', line 20



def pos
  @ss.pos
end


  








  

    #pre_match  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/journey/scanner.rb', line 24



def pre_match
  @ss.pre_match
end


  








  

    #scan   (private)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/journey/scanner.rb', line 43



def scan
  case
    # /
  when @ss.skip(/\//)
    [:SLASH, "/"]
  when @ss.skip(/\(/)
    [:LPAREN, "("]
  when @ss.skip(/\)/)
    [:RPAREN, ")"]
  when @ss.skip(/\|/)
    [:OR, "|"]
  when @ss.skip(/\./)
    [:DOT, "."]
  when text = dedup_scan(/:\w+/)
    [:SYMBOL, text]
  when text = dedup_scan(/\*\w+/)
    [:STAR, text]
  when text = @ss.scan(/(?:[\w%\-~!$&'*,;=@]|\\[:()])/)
    text.tr! "\\", ""
    [:LITERAL, -text]
    # any char
  when text = dedup_scan(/./)
    [:LITERAL, text]
  end
end


  








  

    #scan_setup(str)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/journey/scanner.rb', line 12



def scan_setup(str)
  @ss = StringScanner.new(str)
end