Skip to main content

std::pmr::polymorphic_allocator<T>::deallocate_object

Since C++20
template <class U>
void deallocate_object( U* p, std::size_t n = 1 );

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(n*sizeof(U), alignof(U)), typically through a call to allocate_object<U>(n).

Equivalent to deallocate_bytes(p, n*sizeof(U), alignof(U));

Parameters​

p - pointer to memory to deallocate
n - number of objects of type U the memory was for

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_object

Since C++20
template <class U>
void deallocate_object( U* p, std::size_t n = 1 );

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(n*sizeof(U), alignof(U)), typically through a call to allocate_object<U>(n).

Equivalent to deallocate_bytes(p, n*sizeof(U), alignof(U));

Parameters​

p - pointer to memory to deallocate
n - number of objects of type U the memory was for

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.