41 lines
853 B
Ruby
41 lines
853 B
Ruby
# frozen_string_literal: true
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module TTFunk
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# Maximum aggregate. Its value can only become greater.
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class Max < Aggregate
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# Value
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#
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# @return [Comparable, nil]
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attr_reader :value
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# @param init_value [Comparable] initial value
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def initialize(init_value = nil)
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super()
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@value = init_value
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end
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# Push a value. It will become the new value if it's greater than the
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# current value (or if there was no value).
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#
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# @param new_value [Comparable]
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# @return [void]
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def <<(new_value)
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new_value = coerce(new_value)
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if value.nil? || new_value > value
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@value = new_value
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end
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end
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# Get the stored value or default.
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#
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# @param default [any]
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# @return [any]
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def value_or(default)
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return default if value.nil?
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value
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end
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end
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end
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