use concepts instead of std::enable_if#16758
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elad335
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Feb 25, 2025
| template <typename T> | ||
| concept Bitcopy = (std::is_arithmetic_v<T>) || (std::is_enum_v<T>) || Integral<T> || requires () | ||
| { | ||
| std::enable_if_t<std::conjunction_v<typename T::enable_bitcopy>>(); |
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This change is wrong, enable_if_t checks three things here:
- enable_bitcopy exists.
- enable_bitcopy is constexpr.
- enable_bitcopy::operator()() is true.
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| template <typename T> | ||
| concept ListAlike = requires (std::remove_cvref_t<T>& obj) { obj.insert(obj.end(), std::declval<typename T::value_type>()); }; | ||
| concept ListAlike = requires(std::remove_cvref_t<T>& obj, T::value_type item) { obj.insert(obj.end(), item); }; |
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Suggested change
| concept ListAlike = requires(std::remove_cvref_t<T>& obj, T::value_type item) { obj.insert(obj.end(), item); }; | |
| concept ListAlike = requires(std::remove_cvref_t<T>& obj, T::value_type item) { obj.insert(obj.end(), std::move(item)); }; |
Megamouse
reviewed
Feb 25, 2025
| { | ||
| return error.empty(); | ||
| } | ||
| operator bool() const |
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The indentation is correct now, it was using spaces before. Some lines in the file use spaces others tabs.
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I was learning C++ concepts and decided to replace usages of
std::enable_ifandstd::void_twith concepts.