Torsten Rüger
7c91a08d5b
also small fix for if and return, as they need to execute sneds and yields (not just sends), so testing for Call not SendStatement
35 lines
990 B
Ruby
35 lines
990 B
Ruby
module Vool
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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(@return_value)
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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 mom 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_mom( compiler )
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load = Mom::SlotLoad.new( self , [:message , :return_value] ,
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@return_value.slot_definition(compiler) )
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if @return_value.is_a?(CallStatement)
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ret = @return_value.to_mom(compiler)
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ret << load
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else
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ret = load
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end
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ret << Mom::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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end
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end
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