Torsten Rüger
d1f8733623
Simple is really the descriptive name for the layer Sure, it is "virtual" but that is not as important as the fact that it is simple (or simplified) Also objct (based really) is better, since orientated implies it is a little like that, but only orientated, not really it. Sol only has objects, nothing else Just cause i was renaming anyway
39 lines
1.1 KiB
Ruby
39 lines
1.1 KiB
Ruby
module Sol
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class ReturnStatement < Statement
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attr_reader :return_value
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def initialize(value)
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@return_value = value
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end
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def each(&block)
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block.call(self)
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@return_value.each(&block)
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end
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# Since the return is normalized to only allow simple values it is simple.
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# To return form a method in slot_machine instructions we only need to do two things:
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# - store the given return value, this is a SlotMove
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# - activate return sequence (reinstantiate old message and jump to return address)
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def to_slot( compiler )
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if @return_value.is_a?(CallStatement)
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ret = @return_value.to_slot(compiler)
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ret << slot_load(compiler)
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else
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ret = slot_load(compiler)
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end
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ret << SlotMachine::ReturnJump.new(self , compiler.return_label )
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end
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def to_s(depth = 0)
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at_depth(depth , "return #{@return_value.to_s}")
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end
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def slot_load(compiler)
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SlotMachine::SlotLoad.new( self , [:message , :return_value] ,
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@return_value.to_slot_definition(compiler) )
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end
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end
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end
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