Andrey Breslav
20 lines
568 B
Plaintext
20 lines
568 B
Plaintext
type Comparison<in T> = {(T, T) : Int}
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fun naturalOrder<in T : IComparable<T>>(a : T, b : T) : Int = a.compareTo(b)
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fun castingNaturalOrder(a : Object, b : Object) : Int = a.as<Comparable<Object>>.compareTo(b.as<Comparable<Object>>)
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enum class ComparisonResult {
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LS,EQ, GR
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}
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type MatchableComparison<in T> = {(T, T) : ComparisonResult}
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fun asMatchableComparison<T>(cmp : Comparison<T>) : MatchableComparison<T> = {a, b =>
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val res = cmp(a, b)
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if (res == 0) return ComparisonResult.EQ
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if (res < 0) return ComparisonResult.LS
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return ComparisonResult.GR
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}
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