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
43 lines
1.4 KiB
Ruby
43 lines
1.4 KiB
Ruby
module Vool
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# Base class for assignments (local/ivar), works just as you'd expect
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# Only "quirk" maybe, that arguments are like locals
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#
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# Only actual functionality here is the compile_assign_call which compiles
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# the call, should the assigned value be a call.
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class Assignment < Statement
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attr_reader :name , :value
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def initialize(name , value )
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raise "Name nil #{self}" unless name
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raise "Value nil #{self}" unless value
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raise "Value cant be Assignment #{value}" if value.is_a?(Assignment)
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raise "Value cant be Statements #{value}" if value.is_a?(Statements)
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@name , @value = name , value
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end
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def each(&block)
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block.call(self)
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@value.each(&block)
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end
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def to_s(depth = 0)
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at_depth(depth , "#{@name} = #{@value}")
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end
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# The assign instruction (a slot_load) is produced by delegating the slot to derived
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# class
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#
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# When the right hand side is a CallStatement, it must be compiled, before the assign
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# is executed
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#
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# Derived classes do not implement to_mom, only slot_position
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def to_mom(compiler)
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to = Mom::SlotDefinition.new(:message , self.slot_position(compiler))
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from = @value.slot_definition(compiler)
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assign = Mom::SlotLoad.new(self,to,from)
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return assign unless @value.is_a?(CallStatement)
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@value.to_mom(compiler) << assign
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end
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end
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end
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