P2781R9 std::constant_wrapper #8018
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mattkretz
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Jun 26, 2025
| struct @\exposid{cw-operators}@ { // \expos | ||
| // unary operators | ||
| template<@\exposid{constexpr-param}@ T> | ||
| friend constexpr auto operator+(T) noexcept -> constant_wrapper<(+T::value)> |
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| friend constexpr auto operator+(T) noexcept -> constant_wrapper<(+T::value)> | |
| friend constexpr auto @\libmember{operator+}{constant_wrapper}@(T) noexcept -> constant_wrapper<(+T::value)> |
Same for all the other operators. Though, constant_wrapper isn't 100% correct, I believe it's what is most helpful even to implementers.
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Hm, this would seem to require a bunch of new escaping. Let's do that later.
mattkretz
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Jun 26, 2025
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Fixes #7969
Fixes cplusplus/papers#1458
Allowed paragraphs to number themselves correctly.
For consistency, did not use code font for constexpr in the phrase "constexpr function".