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std::pmr::polymorphic_allocator<T>::deallocate_bytes

Since C++20
void deallocate_bytes( void* p,
                       std::size_t nbytes,
                       std::size_t alignment = alignof(std::max_align_t) );

Deallocates the storage pointed to by p, which must have been allocated from a std::pmr::memory_resource x that compares equal to *resource(). using x.allocate(nbytes, alignment), typically through a call to allocate_bytes(nbytes, alignment).

Equivalent to resource()->deallocate(p, nbytes, alignment);

Parameters​

p - pointer to memory to deallocate
nbytes - the number of bytes originally allocated
alignment - the alignment originally allocated

Exceptions​

Throws nothing.

Notes​

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

std::pmr::polymorphic_allocator<T>::deallocate_bytes

Since C++20
void deallocate_bytes( void* p,
                       std::size_t nbytes,
                       std::size_t alignment = alignof(std::max_align_t) );

Deallocates the storage pointed to by p, which must have been allocated from a std::pmr::memory_resource x that compares equal to *resource(). using x.allocate(nbytes, alignment), typically through a call to allocate_bytes(nbytes, alignment).

Equivalent to resource()->deallocate(p, nbytes, alignment);

Parameters​

p - pointer to memory to deallocate
nbytes - the number of bytes originally allocated
alignment - the alignment originally allocated

Exceptions​

Throws nothing.

Notes​

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