std::nothrow
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<tbody> </tbody>| Definido no cabeçalho <new>
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extern const std::nothrow_t nothrow; |
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std::nothrow is a constant of type std::nothrow_t used to disambiguate the overloads of throwing and non-throwing
.
Exemplo
#include <iostream>
#include <new>
int main()
{
try {
while (true) {
new int[100000000ul]; // throwing overload
}
} catch (const std::bad_alloc& e) {
std::cout << e.what() << '\n';
}
while (true) {
int* p = new(std::nothrow) int[100000000ul]; // non-throwing overload
if (p == nullptr) {
std::cout << "Allocation returned nullptr\n";
break;
}
}
}
Saída:
std::bad_alloc
Allocation returned nullptr
Veja também
tipo de etiqueta usada para selecionar uma função não arremesso de alocação Original: tag type used to select an non-throwing allocation function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe) | |
funções de alocação Original: allocation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função) |