std::shared_ptr::unique

 

C++

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unique_ptr (C++11)
shared_ptr (C++11)
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std::shared_ptr

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shared_ptr::get

shared_ptr::operator* shared_ptr::operator->

shared_ptr::use_count

shared_ptr::unique

shared_ptr::operator bool

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operator== operator|= operator< operator<= operator> operator>=

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std::hash

 

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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Parametri

(Nessuno)

Original:

(none)

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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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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

Vedi anche

use_count	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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)