80 lines
1.9 KiB
Ruby
80 lines
1.9 KiB
Ruby
module Virtual
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# Slots are named, or rather indexed, storage locations that are typed.
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# Four of those locations exist and those correspond to subclasses:
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# - the message that has been received: MessageSlot
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# - the frame of the method that is executing (local variables): FrameSlot
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# - self as an object: SelfSlot
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# - a message that will be sent, NewMessageSlot
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# additionally frame, self and return are slots in Message and NewMessage
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class Slot < Value
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RETURN = 0
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SELF = 1
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FRAME = 2
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NAME = 3
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MESSAGE_PAYLOAD = 4
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attr_accessor :index , :type
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private #abstract base class
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def initialize index , type
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@index = index
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@type = type
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end
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end
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class MessageSlot < Slot
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def initialize index , type = Mystery
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super(index + MESSAGE_PAYLOAD ,type)
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end
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end
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class FrameSlot < Slot
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def initialize index , type = Mystery
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super
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end
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end
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class SelfSlot < Slot
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def initialize index , type = Mystery
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super
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end
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end
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class NewMessageSlot < Slot
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def initialize index , type = Mystery
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super(index + MESSAGE_PAYLOAD , type)
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end
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end
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class Return < MessageSlot
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def initialize type = Mystery
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super( RETURN - MESSAGE_PAYLOAD, type )
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end
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end
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class Self < MessageSlot
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def initialize type = Mystery
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super( SELF - MESSAGE_PAYLOAD , type )
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end
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end
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class Name < MessageSlot
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def initialize type = Mystery
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super( NAME - MESSAGE_PAYLOAD , type )
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end
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end
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class NewReturn < NewMessageSlot
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def initialize type = Mystery
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super( RETURN - MESSAGE_PAYLOAD, type )
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end
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end
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class NewSelf < NewMessageSlot
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def initialize type = Mystery
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super( SELF - MESSAGE_PAYLOAD , type )
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end
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end
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class NewName < NewMessageSlot
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def initialize type = Mystery
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super( NAME - MESSAGE_PAYLOAD , type )
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end
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end
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end
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