std::enable_shared_from_this::shared_from_this
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| shared_ptr<T> shared_from_this(); |
(1) | |
| shared_ptr<T const> shared_from_this() const; |
(2) | |
Gibt eine std::shared_ptr<T>, dass Aktien das Eigentum an *this mit allen vorhandenen std::shared_ptr<T>, die beziehen sich auf *this .
Original:
Returns a std::shared_ptr<T> that shares ownership of *this with all existing std::shared_ptr<T> that refer to *this.
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[Bearbeiten] Notes
Vor dem Aufruf
shared_from_this, sollte es mindestens sein std::shared_ptr<T> p die *this besitzt .Original:
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[Bearbeiten] Rückgabewert
std::shared_ptr<T>, dass Aktien das Eigentum an *this mit bereits bestehenden std::shared_ptr<T>s
Original:
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[Bearbeiten] Beispiel
#include <iostream> #include <memory> struct Foo : public std::enable_shared_from_this<Foo> { Foo() { std::cout << "Foo::Foo\n"; } ~Foo() { std::cout << "Foo::~Foo\n"; } std::shared_ptr<Foo> getFoo() { return shared_from_this(); } }; int main() { Foo *f = new Foo; std::shared_ptr<Foo> pf1; { std::shared_ptr<Foo> pf2(f); pf1 = pf2->getFoo(); // shares ownership of object with pf2 } std::cout << "pf2 is gone\n"; }
Output:
Foo::Foo pf2 is gone Foo::~Foo
[Bearbeiten] Siehe auch
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