Clarify the documentation of SignedNumeric. #38758
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Previously we said that a type conforming to SignedNumeric allows positive and negative values, but that's nonsense. A type conforms to signed numeric if it has a negate() operation; it doesn't even have to have a notion of positive or negative values (for examples, see complex numbers, quaternions, integers mod n, etc).
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@swift-ci please smoke test and merge. |
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Previously we said that a type conforming to SignedNumeric allows positive and negative values, but that's nonsense. A type conforms to signed numeric if it has a negate() operation; it doesn't even have to have a notion of positive or negative values (for examples, see complex numbers, quaternions, integers mod n, etc).
Resolves SR-12078, rdar://58997153