Defined in header <memory>
template< class T, class Alloc, class... Args >
constexpr T* uninitialized_construct_using_allocator( T* p, const Alloc& alloc, Args&&... args );
(since C++20)

Creates an object of the given type T by means of uses-allocator construction at the uninitialized memory location indicated by p.

Equivalent to.

return std::apply([&]<class... Xs>(Xs&&...xs) {
        return std::construct_at(p, std::forward<Xs>(xs)...);
    }, std::uses_allocator_construction_args<T>(alloc, std::forward<Args>(args)...));


p - the memory location where the object will be placed.
alloc - the allocator to use.
args - the arguments to pass to T's constructor

Return value

Pointer to the newly-created object of type T.


May throw any exception thrown by the constructor of T, typically including std::bad_alloc.


See also

checks if the specified type supports uses-allocator construction
(class template)
creates an object of the given type by means of uses-allocator construction
(function template)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.