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std::get_temporary_buffer – cppreference.com

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definiert in Header

<memory>

template< class T > std::pair< T*, std::ptrdiff_t > get_temporary_buffer( std::ptrdiff_t count )

Weist Speicher ausreichen, um bis zu count angrenzenden Objekte vom Typ T. Wenn es nicht genügend Speicher für alle count Objekte, weist weniger als count, wenn möglich .

Original:

Allocates storage sufficient to store up to count adjacent objects of type T. If there is insufficient memory for all count objects, allocates less than count, if possible.

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Parameter

count -

die Anzahl der Objekte zu verteilen

Original:

the number of objects to allocate

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Rückgabewert

Ein std::pair einen Zeiger auf den Beginn des zugewiesenen Speicher und der Anzahl von Objekten, die in der Speichereinheit, die tatsächlich zugewiesen war passen (Null sein kann) .

Original:

An std::pair holding a pointer to the beginning of the allocated storage and the number of objects that fit in the storage that was actually allocated (may be zero).

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Ausnahmen

Beispiel

[edit]

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

int main()
{
    const std::string s[] = {"string", "1", "test", "..."};
    std::string* p = std::get_temporary_buffer<std::string>(4).first;

    std::copy(std::begin(s), std::end(s),
              std::raw_storage_iterator<std::string*, std::string>(p));

    for (std::string* i = p; i != p+4; ++i) {
        std::cout << *i << '\n';
        i->~basic_string<char>();
    }
    std::return_temporary_buffer(p);
}

Output:

Siehe auch