std::return_temporary_buffer
Defined in header <memory> | ? | ? |
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template< class T > void return_temporary_buffer( T* p ); | ? | (deprecated in C++17) |
分配以前分配给std::get_temporary_buffer
...
参数
p | - | the pointer previously returned by std::get_temporary_buffer and not invalidated by an earlier call to return_temporary_buffer |
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返回值
%280%29
Exceptions (none). | (since C++17) |
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例
二次
#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));
// 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>();
});
std::return_temporary_buffer(p.first);
}
二次
产出:
二次
string
1
test
...
二次
另见
get_temporary_buffer (deprecated in C++17) | obtains uninitialized storage (function template) |
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? cppreference.com
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