37 lines
797 B
Ruby
37 lines
797 B
Ruby
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class Sequencer
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class Unit
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module Common
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module Mixin
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module DynamicAttribute
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def self.included(base)
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class << base
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def inherited(base)
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base.extend(Forwardable)
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base.instance_delegate [:attribute] => base
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end
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def attribute
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@attribute ||= begin
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if uses.size != 1
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raise "DynamicAttribute classes can use exactly one attribute. Found #{uses.size}."
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end
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uses.first
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end
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end
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end
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end
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private
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def attribute_value
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@attribute_value ||= state.use(attribute)
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end
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end
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end
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end
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end
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end
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