std::pmr::polymorphic_allocator<T>::allocate_bytes

 

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std::pmr::polymorphic_allocator

Member functions

polymorphic_allocator::polymorphic_allocator

polymorphic_allocator::allocate

polymorphic_allocator::deallocate

polymorphic_allocator::construct

polymorphic_allocator::destroy (C++20/26*)

polymorphic_allocator::allocate_bytes (C++20)

polymorphic_allocator::deallocate_bytes (C++20)

polymorphic_allocator::allocate_object (C++20)

polymorphic_allocator::deallocate_object (C++20)

polymorphic_allocator::new_object (C++20)

polymorphic_allocator::delete_object (C++20)

polymorphic_allocator::select_on_container_copy_construction

polymorphic_allocator::resource

Non-member functions

operator==operator!= (until C++20)

 

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

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