44 lines
1.1 KiB
Ruby
44 lines
1.1 KiB
Ruby
module SlotLanguage
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# A Variable makes Slots. A Slot is the central SlotMachines description of a
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# variable in an object. At the Language level this holds the information
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# (names of variables) to be able to create the Slot instance
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#
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# In the SlotLanguage this is used in the Assignment. Just as a Slotload stores
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# two slots to define what is loaded where, the Assignment, that creates a SlotLoad,
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# uses two Variables.
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class Variable
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# stores the (instance) names that allow us to create a Slot
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attr_reader :name , :chain
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def initialize(name)
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@name = name
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raise "No name given #{name}" unless name.is_a?(Symbol)
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end
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def chained(to)
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raise "Must chain to variable #{to}" unless to.is_a?(Variable)
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if(@chain)
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@chain.chained(to)
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else
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@chain = to
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end
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self
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end
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def to_slot(compiler)
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SlotMachine::Slot.for(:message , name)
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end
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def to_s
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str = "message.#{name}"
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str += chain.to_s if @chain
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str
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end
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end
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class MessageVariable < Variable
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end
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class Constant < Variable
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end
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end
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