std::shared_ptr::unique

 

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Dynamische Speicherverwaltung

Low-Level-Speicherverwaltung
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allocator
allocator_traits (C++11)
allocator_arg_t (C++11)
allocator_arg (C++11)
uses_allocator (C++11)
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unique_ptr (C++11)
shared_ptr (C++11)
weak_ptr (C++11)
auto_ptr (veraltet)
owner_less (C++11)
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

shared_ptr::operator* shared_ptr::operator->

shared_ptr::use_count

shared_ptr::unique

shared_ptr::operator bool

shared_ptr::owner_before

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std::swap

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

operator<<

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std::hash

 

bool unique()const;

Prüft, ob *this ist die einzige shared_ptr beispielsweise die Verwaltung des aktuellen Objekts, dh ob 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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Parameter

(None)

Original:

(none)

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Rückgabewert

true wenn *this ist die einzige shared_ptr beispielsweise die Verwaltung des aktuellen Objekts, false sonst .

Original:

true if *this is the only shared_ptr instance managing the current object, false otherwise.

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Beispiel

#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

Siehe auch

use_count	gibt die Anzahl der shared_ptr-Objekte zurück, die auf dasselbe verwaltete Objekt verweisen (öffentliche Elementfunktion)