Class: TRuby::ParserCombinator::TokenAlternative

Inherits:
TokenParser
  • Object
show all
Defined in:
lib/t_ruby/parser_combinator/token/token_alternative.rb

Overview

Alternative: try first, if fails try second

Instance Method Summary collapse

Methods inherited from TokenParser

#<<, #>>, #label, #many, #many1, #map, #optional, #sep_by, #sep_by1, #|

Constructor Details

#initialize(left, right) ⇒ TokenAlternative

Returns a new instance of TokenAlternative.



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# File 'lib/t_ruby/parser_combinator/token/token_alternative.rb', line 7

def initialize(left, right)
  @left = left
  @right = right
end

Instance Method Details

#parse(tokens, position = 0) ⇒ Object 



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# File 'lib/t_ruby/parser_combinator/token/token_alternative.rb', line 12

def parse(tokens, position = 0)
  result = @left.parse(tokens, position)
  return result if result.success?

  @right.parse(tokens, position)
end