44 lines
1.3 KiB
Ruby
44 lines
1.3 KiB
Ruby
module Virtual
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# A frame, or activation frame, represents a function call during calling. So not the static definition of the function
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# but the dynamic invokation of it.
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#
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# In a minimal c world this would be just the return address, but with exceptions and continuations things get more
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# complicated. How much more we shall see
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#
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# The current list comprises
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# - next normal instruction
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# - next exception instruction
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# - self (me)
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# - argument mappings
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# - local variable mapping, together with last called binding
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class Frame
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def initialize normal , exceptional , me
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@next_normal = normal
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@next_exception = exceptional
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@me = me
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# a binding represents the local variables at a point in the program.
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# The amount of local variables is assumed to be relatively small, and so the
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# storage is a linked list. Has the same api as a ha
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@binding = List.new
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end
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attr_reader :next_normal, :next_exception, :me, :binding
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# dummy for the eventual
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def new_frame
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self
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end
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#
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def compile_get method , name
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method.add FrameGet.new(name)
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end
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def compile_send method , name , with = []
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method.add FrameSend.new(name , with )
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end
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def compile_set method , name , val
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method.add FrameSet.new(name , val )
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end
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end
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end
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