NAME¶

std::pmr::polymorphic_allocator::allocate_bytes - std::pmr::polymorphic_allocator::allocate_bytes

Synopsis¶

[[nodiscard]] void* allocate_bytes( std::size_t nbytes, (since C++20)
std::size_t alignment = alignof(std::max_align_t) );

Allocates nbytes bytes of storage at specified alignment alignment using the
underlying memory resource. Equivalent to return resource()->allocate(nbytes,
alignment);.

Parameters¶

nbytes - the number of bytes to allocate
alignment - the alignment to use

Return value¶

A pointer to the allocated storage.

Notes¶

This function was introduced for use with the fully-specialized allocator
std::pmr::polymorphic_allocator<>, but it may be useful in any specialization.

The return type is void* (rather than, e.g., std::byte*) to support conversion to an
arbitrary pointer type U* by static_cast<U*>.

Exceptions¶

May throw any exceptions thrown by the call to resource()->allocate.

See also¶

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