Class: Yaparc::Satisfy

Inherits:
Object
  • Object
show all
Includes:
Parsable
Defined in:
lib/yaparc/satisfy.rb

Constant Summary

Constants included from Parsable

Parsable::IS_ALPHANUM, Parsable::IS_CR, Parsable::IS_DIGIT, Parsable::IS_LOWER, Parsable::IS_SPACE, Parsable::IS_WHITESPACE

Instance Method Summary collapse

Constructor Details

#initialize(predicate) ⇒ Satisfy

Returns a new instance of Satisfy.



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# File 'lib/yaparc/satisfy.rb', line 7

def initialize(predicate)
  @parser = lambda do |input|
    result = Item.new.parse(input)

    if result.instance_of?(OK) && predicate.call(result.value)
      Succeed.new(result.value, result.input)
    else
      FailParser.new
    end
  end
end

Instance Method Details

#parse(input) ⇒ Object 



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# File 'lib/yaparc/satisfy.rb', line 19

def parse(input)
  case parser = @parser.call(input)
  in Succeed
    parser.parse(parser.remaining)
  in FailParser
    parser.parse(input)
  end
end