std::get_temporary_buffer - cppreference.com

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Definido no cabeçalho `<memory>`

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

Aloca armazenamento suficiente para armazenar até count objetos adjacentes de T tipo. Se não houver memória suficiente para todos os objetos count, aloca menos de count, se possível.

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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Parâmetros

count

o número de objetos para alocar

Original:

the number of objects to allocate

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Valor de retorno

Uma std::pair mantendo um ponteiro para o início do armazenamento alocado e o número de objectos que se encaixam no armazenamento que foi efectivamente reservada (pode ser zero).

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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Exceções

Exemplo

#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);
}

Saída:

Veja também


	liberta de armazenamento não inicializado Original: frees uninitialized storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) [edit]