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[libc++] `std::ranges::clamp` violates [alg.clamp]p5 · Issue #64717 · llvm/llvm-project · GitHub
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[libc++] std::ranges::clamp violates [alg.clamp]p5 #64717
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Description
[alg.clamp]p5 mandates the complexity requirements for std::ranges::clamp to be at most two comparisons and three applications of the projection. libc++ however applies the projection four times. See godbolt.
if (std::invoke(__comp, std::invoke(__proj, __value), std::invoke(__proj, __low))) return __low; else if (std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __value))) return __high; Metadata Metadata
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