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update stl/inc/xtr1common: _Is_any_of_v #3933

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Aug 11, 2023
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update stl/inc/xtr1common: _Is_any_of_v #3933

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update stl/inc/xtrlcommon: _Is_any_of_v
GoodenoughPhysicsLab Aug 7, 2023
41700f1
update stl/inc/xtrlcommon: _Is_any_of_v
GoodenoughPhysicsLab Aug 7, 2023
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4 changes: 4 additions & 0 deletions stl/inc/xtr1common
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Original file line number Diff line number Diff line change
Expand Up @@ -168,7 +168,11 @@ _INLINE_VAR constexpr bool disjunction_v = disjunction<_Traits...>::value;

template <class _Ty, class... _Types>
_INLINE_VAR constexpr bool _Is_any_of_v = // true if and only if _Ty is in _Types
#if _HAS_CXX17
(is_same_v<_Ty, _Types> || ...);
#else
disjunction_v<is_same<_Ty, _Types>...>;
#endif /* _HAS_CXX17 */

_NODISCARD constexpr bool _Is_constant_evaluated() noexcept { // Internal function for any standard mode
return __builtin_is_constant_evaluated();
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