std::pmr::polymorphic_allocator<T>::allocate

T* allocate( std::size_t n );
(since C++17)
(until C++20)
[[nodiscard]] T* allocate( std::size_t n );
(since C++20)

Allocates storage for n objects of type T using the underlying memory resource. Equivalent to return static_cast<T*>(resource()->allocate(n * sizeof(T), alignof(T)));.

Parameters

n - the number of objects to allocate storage for

Return value

A pointer to the allocated storage.

Exceptions

Throws std::length_error if n > SIZE_MAX / sizeof(T); may also any exceptions thrown by the call to resource()->allocate.

See also

(C++20)
Allocate raw aligned memory from the underlying resource
(public member function)
(C++20)
Allocates raw memory suitable for an object or an array
(public member function)
(C++20)
Allocates and constructs an object
(public member function)
[static]
allocates uninitialized storage using the allocator
(public static member function of std::allocator_traits<Alloc>)
allocates memory
(public member function of std::pmr::memory_resource)

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