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std::uninitialized_construct_using_allocator

From cppreference.com
< cpp‎ | memory
 
C++
 
Memory management library
(exposition only*)
Allocators
(C++11)
(C++11)
(C++20)
(C++20)
uninitialized_construct_using_allocator
(C++20)
Uninitialized memory algorithms
Constrained uninitialized memory algorithms
Memory resources
Uninitialized storage (until C++20)
(until C++20*)
(until C++20*)
(until C++20*)

Garbage collector support (until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
 
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)...));

Contents

[edit] Parameters

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

[edit] Return value

Pointer to the newly-created object of type T.

[edit] Exceptions

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

[edit] Example

This section is incomplete
Reason: no example

[edit] See also

(C++11)
 checks if the specified type supports uses-allocator construction
(class template) [edit]
(C++20)
 creates an object of the given type by means of uses-allocator construction
(function template) [edit]
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