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std::shared_ptr::unique

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< cpp‎ | memory‎ | shared ptr

 
 
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Gestione della memoria dinamica
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Smart pointers
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unique_ptr(C++11)
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enable_shared_from_this(C++11)
bad_weak_ptr(C++11)
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std::shared_ptr
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shared_ptr::shared_ptr
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shared_ptr::get
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shared_ptr::use_count
shared_ptr::unique
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bool unique() const;
Verifica se *this è l'istanza shared_ptr solo gestire l'oggetto corrente, vale a dire se use_count() == 1.
Original:
Checks if *this is the only shared_ptr instance managing the current object, i.e. whether use_count() == 1.
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Indice

[modifica] Parametri

(Nessuno)
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(none)
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[modifica] Valore di ritorno

true se *this è l'istanza shared_ptr solo gestire l'oggetto corrente, false altrimenti.
Original:
true if *this is the only shared_ptr instance managing the current object, false otherwise.
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[modifica] Esempio

#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; 
}

Output:

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

[modifica] Vedi anche

restituisce il numero di oggetti shared_ptr riferiscono allo stesso oggetto gestito
Original:
returns the number of shared_ptr objects referring to the same managed object
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(membro pubblico funzione) [edit]