Class: Aurum::Engine::PushbackString

Inherits:
Object
  • Object
show all
Defined in:
lib/aurum/engine/tokenization_facility.rb

Instance Method Summary collapse

Constructor Details

#initialize(string) ⇒ PushbackString

Returns a new instance of PushbackString.



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# File 'lib/aurum/engine/tokenization_facility.rb', line 67

def initialize string
  @string = string
end

Instance Method Details

#eof? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/aurum/engine/tokenization_facility.rb', line 76

def eof?
  @get_char_index = -1 unless @get_char_index
  @get_char_index >= (@string.length - 1)
end

#get_char ⇒ Object 



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# File 'lib/aurum/engine/tokenization_facility.rb', line 71

def get_char
  @get_char_index = -1 unless @get_char_index
  @string[@get_char_index += 1]
end

#pushback(char) ⇒ Object 



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# File 'lib/aurum/engine/tokenization_facility.rb', line 81

def pushback char
  @get_char_index -= 1
end