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std::shared_ptr::unique

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< cpp‎ | memory‎ | shared ptr

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std::shared_ptr
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bool unique() const;
Verifica se *this é a instância shared_ptr só gerir o objeto atual, ou seja, se use_count() == 1.
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Checks if *this is the only shared_ptr instance managing the current object, i.e. whether use_count() == 1.
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Índice

[editar] Parâmetros

(Nenhum)
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(none)
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[editar] Valor de retorno

true se *this é a instância shared_ptr só gerir o objeto atual, false contrário.
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true if *this is the only shared_ptr instance managing the current object, false otherwise.
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[editar] Exemplo

#include <memory> 
#include <iostream> 
 
int main() 
{ 
    std::shared_ptr<int> sp1 {std::make_shared<int>(5)};
    std::cout << "sp1.unique() == " << std::boolalpha << sp1.unique() << std::endl; 
 
    std::shared_ptr<int> sp2 {sp1}; 
    std::cout << "sp1.unique() == " << std::boolalpha << sp1.unique() << std::endl; 
}

Saída: 

sp1.unique() == true
sp1.unique() == false

[editar] Veja também
retorna o número de objetos shared_ptr referentes ao mesmo objeto gerenciado
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returns the number of shared_ptr objects referring to the same managed object
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(função pública membro) [edit]
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