# std::allocator<T>::deallocate

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< cpp‎ | memory‎ | allocator

void deallocate( T* p, std::size_t n ); |  |

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.

### 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>`)

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