32 lines
725 B
Ruby
32 lines
725 B
Ruby
# typed: true # rubocop:todo Sorbet/StrictSigil
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# frozen_string_literal: true
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require "delegate"
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# An object which lazily evaluates its inner block only once a method is called on it.
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class LazyObject < Delegator
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def initialize(&callable)
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super(callable)
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end
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def __getobj__(&)
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return @__getobj__ if defined?(@__getobj__)
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@__getobj__ = @__callable__.call
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end
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def __setobj__(callable)
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@__callable__ = callable
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end
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# Forward to the inner object to make lazy objects type-checkable.
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#
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# @!visibility private
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def is_a?(klass)
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# see https://sorbet.org/docs/faq#how-can-i-fix-type-errors-that-arise-from-super
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T.bind(self, T.untyped)
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__getobj__.is_a?(klass) || super
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end
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end
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