std::allocator<T>::deallocate

 

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Technical Specifications

 

Dynamic memory management

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std::allocator

Member functions

allocator::allocator

allocator::~allocator

allocator::address (until C++20)

allocator::allocate

allocator::deallocate

allocator::max_size (until C++20)

allocator::construct (until C++20)

allocator::destroy (until C++20)

Non-member functions

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

 

void deallocate( T* p, std::size_t n );		(until C++20)
constexpr void deallocate( T* p, std::size_t n );		(since C++20)

Deallocates the storage referenced by the pointer p, which must be a pointer obtained by an earlier call to allocate().

The argument n must be equal to the first argument of the call to allocate() that originally produced p; otherwise, the behavior is undefined.

Calls ::operator delete(void*) or ::operator delete(void*, std::align_val_t) (since C++17), but it is unspecified when and how it is called.

In evaluation a constant expression, this function must deallocate storage allocated within the evaluation of the same expression.

(since C++20)

Parameters

p	-	pointer obtained from allocate()
n	-	number of objects earlier passed to allocate()

Return value

(none)

See also

allocate	allocates uninitialized storage (public member function)
deallocate [static]	deallocates storage using the allocator (public static member function of std::allocator_traits<Alloc>)