Class: KPeg::ForeignInvokeRule

Inherits:

Operator

• Object
• Operator
• KPeg::ForeignInvokeRule

show all

Defined in:

lib/kpeg/grammar.rb

Instance Attribute Summary (collapse)

• - (Object) arguments readonly

  Returns the value of attribute arguments.

• - (Object) grammar_name readonly

  Returns the value of attribute grammar_name.

• - (Object) rule_name readonly

  Returns the value of attribute rule_name.

Attributes inherited from Operator

#action

Instance Method Summary (collapse)

• - (Object) ==(obj)
• - (ForeignInvokeRule) initialize(grammar, name, args = nil) constructor

  A new instance of ForeignInvokeRule.

• - (Object) inspect
• - (Object) match(x)

Methods inherited from Operator

#detect_tags, #inspect_type, #prune_values, #set_action, #|

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# File 'lib/kpeg/grammar.rb', line 463

def initialize(grammar, name, args=nil)
  super()
  @grammar_name = grammar
  @rule_name = name
  if !args or args.empty?
    @arguments = nil
  else
    @arguments = args
  end
end

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# File 'lib/kpeg/grammar.rb', line 474

def arguments
  @arguments
end

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# File 'lib/kpeg/grammar.rb', line 474

def grammar_name
  @grammar_name
end

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# File 'lib/kpeg/grammar.rb', line 474

def rule_name
  @rule_name
end

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# File 'lib/kpeg/grammar.rb', line 482

def ==(obj)
  case obj
  when ForeignInvokeRule
    @grammar_name == obj.grammar_name and \
      @rule_name == obj.rule_name and @arguments == obj.arguments
  else
    super
  end
end

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# File 'lib/kpeg/grammar.rb', line 492

def inspect
  if @arguments
    body = "%#{@grammar}.#{@rule_name} #{@arguments}"
  else
    body = "%#{@grammar}.#{@rule_name}"
  end
  inspect_type "invoke", body
end

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# File 'lib/kpeg/grammar.rb', line 476

def match(x)
  rule = x.grammar.find(@rule_name)
  raise "Unknown rule: '#{@rule_name}'" unless rule
  x.invoke rule
end