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[libc++] ADL-proof __libcpp_is_nothrow_constructible.

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The GCC C++20 buildbot hit this ADL call; Clang doesn't,
presumably because it uses a compiler builtin instead of
this codepath in <type_traits>.
https://buildkite.com/llvm-project/libcxx-ci/builds/674
This commit is contained in:
Arthur O'Dwyer
2020-12-08 15:41:48 -05:00
parent 483fb33360
commit 35c3b53943
1 changed files with 2 additions and 2 deletions
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4
libcxx/include/type_traits
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@@ -1821,7 +1821,7 @@ template <typename _Tp>
static void __test_noexcept(_Tp) noexcept;
template<typename _Fm, typename _To>
static bool_constant<noexcept(__test_noexcept<_To>(declval<_Fm>()))>
static bool_constant<noexcept(_VSTD::__test_noexcept<_To>(declval<_Fm>()))>
__is_nothrow_convertible_test();
template <typename _Fm, typename _To>
@@ -3293,7 +3293,7 @@ void __implicit_conversion_to(_Tp) noexcept { }
template <class _Tp, class _Arg>
struct __libcpp_is_nothrow_constructible</*is constructible*/true, /*is reference*/true, _Tp, _Arg>
: public integral_constant<bool, noexcept(__implicit_conversion_to<_Tp>(declval<_Arg>()))>
: public integral_constant<bool, noexcept(_VSTD::__implicit_conversion_to<_Tp>(declval<_Arg>()))>
{
};