Module: SwapInstruction

Included in:
BoolSwapInstruction, CodeSwapInstruction, ExecSwapInstruction, FloatSwapInstruction, IntSwapInstruction, NameSwapInstruction
Defined in:
lib/instructions/infrastructure.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#target_stack ⇒ Object (readonly)

Returns the value of attribute target_stack.



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# File 'lib/instructions/infrastructure.rb', line 144

def target_stack
  @target_stack
end

Instance Method Details

#cleanup ⇒ Object 



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# File 'lib/instructions/infrastructure.rb', line 160

def cleanup
  pushes @target_stack, @result1
  pushes @target_stack, @result2
end

#derive ⇒ Object 



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# File 'lib/instructions/infrastructure.rb', line 158

def derive
end

#initialize(context, target_stack) ⇒ Object 



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# File 'lib/instructions/infrastructure.rb', line 146

def initialize(context, target_stack)
  @target_stack = target_stack
  super(context)
end

#preconditions? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/instructions/infrastructure.rb', line 151

def preconditions?
  needs @target_stack, 2
end

#setup ⇒ Object 



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# File 'lib/instructions/infrastructure.rb', line 154

def setup
  @result1 = @context.pop(@target_stack)
  @result2 = @context.pop(@target_stack)
end