libstdc++: Simplify std::allocator_traits<allocator<void>>::construct

We don't need a preprocessor condition to decide whether to use
placement new or std::construct_at, because std::_Construct already does
that.

libstdc++-v3/ChangeLog:

	* include/bits/alloc_traits.h (allocator_traits<allocator<void>>):
	Use std::_Construct for construct.

(cherry picked from commit 917c7b136e8b556b0027223058006a6caeb56871)

diff --git a/libstdc++-v3/include/bits/alloc_traits.h b/libstdc++-v3/include/bits/alloc_traits.h
index 602a90d4d8a63a19e89820fda7fc0acd4039064e..5e19ffece50409c8ef9d72312765a8bdd3808db4 100644 (file)
--- a/libstdc++-v3/include/bits/alloc_traits.h
+++ b/libstdc++-v3/include/bits/alloc_traits.h
@@ -632,13 +632,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
        static _GLIBCXX20_CONSTEXPR void
        construct(allocator_type&, _Up* __p, _Args&&... __args)
        noexcept(std::is_nothrow_constructible<_Up, _Args...>::value)
-       {
-#if __cplusplus <= 201703L
-         ::new((void *)__p) _Up(std::forward<_Args>(__args)...);
-#else
-         std::construct_at(__p, std::forward<_Args>(__args)...);
-#endif
-       }
+       { std::_Construct(__p, std::forward<_Args>(__args)...); }
 
       /**
        *  @brief  Destroy an object of type `_Up`