NAME

std::return_temporary_buffer - std::return_temporary_buffer

Synopsis

Defined in header <memory>
template< class T > (deprecated in C++17)
void return_temporary_buffer( T* p ); (removed in C++20)

Deallocates storage previously allocated with std::get_temporary_buffer.

Parameters

p - the pointer previously returned by std::get_temporary_buffer and not invalidated
by an earlier call to return_temporary_buffer

Return value

(none)

Exceptions

Throws nothing.

Example

// Run this code

#include <algorithm>
#include <iostream>
#include <memory>
#include <string>
#include <iterator>

int main()
{
const std::string s[] = {"string", "1", "test", "..."};
const auto p = std::get_temporary_buffer<std::string>(4);
// requires that p.first is passed to return_temporary_buffer
// (beware of early exit points and exceptions)

std::copy(s, s + p.second,
std::raw_storage_iterator<std::string*, std::string>(p.first));
// has same effect as: std::uninitialized_copy(s, s + p.second, p.first);
// requires that each string in p is individually destroyed
// (beware of early exit points and exceptions)

std::copy(p.first, p.first + p.second,
std::ostream_iterator<std::string>{std::cout, "\n"});

std::for_each(p.first, p.first + p.second, [](std::string& e) {
e.~basic_string<char>();
}); // same as: std::destroy(p.first, p.first + p.second);

std::return_temporary_buffer(p.first);
}

Output:

string
1
test
...