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std::unique_ptr::release

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< cpp‎ | memory‎ | unique ptr
 
 
 
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Allocators
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Smart pointers
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unique_ptr(C++11)
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owner_less(C++11)
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bad_weak_ptr(C++11)
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std :: unique_ptr
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unique_ptr::unique_ptr
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unique_ptr::release
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unique_ptr::get
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pointer release();
(seit C++11)

Gibt den Besitz des verwalteten Objekts auf, falls vorhanden. get() liefert nach dem Aufruf nullptr.

Inhaltsverzeichnis

[Bearbeiten] Parameter

(keine)

[Bearbeiten] Rückgabewert

Zeiger auf das verwaltete Objekt oder nullptr, wenn kein Objekt verwaltet wurde, dh der Wert, der durch get() vor dem Aufruf zurückgegeben würde.

[Bearbeiten] Ausnahmen

noexcept specification:  
noexcept
  (seit C++11)

[Bearbeiten] Beispiel

#include <memory>
#include <iostream>
 
struct Foo {
    Foo() { std::cout << "Foo\n"; }
    ~Foo() { std::cout << "~Foo\n"; }
};
 
int main()
{
    std::cout << "Creating new Foo...\n";
    std::unique_ptr<Foo> up(new Foo());
 
    std::cout << "About to release Foo...\n";
    Foo* fp = up.release();
 
    if (up.get() == nullptr)
        std::cout << "Foo is no longer owned by unique_ptr...\n";
 
    delete fp;
}

Output:

Creating new Foo...
Foo
About to release Foo...
Foo is no longer owned by unique_ptr...
~Foo

[Bearbeiten] Siehe auch

liefert einen Zeiger auf das verwaltete Objekt
Original:
returns a pointer to the managed object
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(öffentliche Elementfunktion) [edit]
ersetzt das verwaltete Objekt
Original:
replaces the managed object
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(öffentliche Elementfunktion) [edit]