Method: ANTLR3::Recognizer#backtrack

Defined in:
lib/antlr3/recognizers.rb

#backtrack ⇒ Object 



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# File 'lib/antlr3/recognizers.rb', line 839

def backtrack
  @state.backtracking += 1
  start = @input.mark
  success =
    begin yield
    rescue BacktrackingFailed then false
    else true
    end
  return success
ensure
  @input.rewind( start )
  @state.backtracking -= 1
end