std::pmr::polymorphic_allocator<T>::allocate_bytes
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::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
|
(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) |
| allocate memory (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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