std::shared_ptr<T>::get
cppreference.net에서
T* get() const noexcept;
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(C++17까지) | |
element_type* get() const noexcept;
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(C++17부터) (constexpr (C++26부터)) |
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저장된 포인터를 반환합니다.
반환값
저장된 포인터.
참고 사항
A
shared_ptr
는 객체의 소유권을 공유하면서 다른 객체를 가리키는 포인터를 저장할 수 있습니다.
get()
는 관리되는 포인터가 아닌 저장된 포인터를 반환합니다.
예제
이 코드 실행
#include <iostream> #include <memory> #include <string_view> int main() { auto output = [](std::string_view msg, int const* pInt) { std::cout << msg << *pInt << " in " << pInt << '\n'; }; int* pInt = new int(42); std::shared_ptr<int> pShared = std::make_shared<int>(42); output("Naked pointer: ", pInt); // output("Shared pointer: ", pShared); // compiler error output("Shared pointer: ", &*pShared); // OK, calls operator*, then takes addr output("Shared pointer with get(): ", pShared.get()); delete pInt; std::cout << "\nThe shared_ptr's aliasing constructor demo.\n"; struct Base1 { int i1{}; }; struct Base2 { int i2{}; }; struct Derived : Base1, Base2 { int i3{}; }; std::shared_ptr<Derived> p(new Derived()); std::shared_ptr<Base2> q(p, static_cast<Base2*>(p.get())); std::cout << "q shares ownership with p, but points to Base2 subobject:\n" << "p.get(): " << p.get() << '\n' << "q.get(): " << q.get() << '\n' << "&(p->i1): " << &(p->i1) << '\n' << "&(p->i2): " << &(p->i2) << '\n' << "&(p->i3): " << &(p->i3) << '\n' << "&(q->i2): " << &(q->i2) << '\n'; }
가능한 출력:
Naked pointer: 42 in 0xacac20 Shared pointer: 42 in 0xacac50 Shared pointer with get(): 42 in 0xacac50 The shared_ptr's aliasing constructor demo. q shares ownership with p, but points to Base2 subobject: p.get(): 0xacac20 q.get(): 0xacac24 &(p->i1): 0xacac20 &(p->i2): 0xacac24 &(p->i3): 0xacac28 &(q->i2): 0xacac24
참고 항목
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저장된 포인터를 역참조합니다
(public member function) |