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std::enable_shared_from_this::enable_shared_from_this

STD：：启用[医]共享[医]从[医]这：：启用[医]共享[医]从[医]这

constexpr enable_shared_from_this((1)(since C++11)
enable_shared_from_this( const enable_shared_from_this<T>&obj (2)(since C++11)

构造新enable_shared_from_this对象。私人std::weak_ptr<T>成员是值初始化的。

参数

obj-an enable_shared_from_this to copy

例外

noexcept规格：

noexcept

例

二次

#include <memory>
 
struct Foo : public std::enable_shared_from_this<Foo> {
    Foo() {}  // implicitly calls enable_shared_from_this constructor
    std::shared_ptr<Foo> getFoo() { return shared_from_this( }
};
 
int main() {
    std::shared_ptr<Foo> pf1(new Foo
    auto pf2 = pf1->getFoo(  // shares ownership of object with pf1
}

二次

另见

shared_ptr (C++11)smart pointer with shared object ownership semantics (class template)

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