std::weak_ptr
Defined in header <memory> | ||
|---|---|---|
template<class T> weak_ptr(std::shared_ptr<T>) -> weak_ptr<T>; | (since C++17) |
One deduction guide is provided for std::weak_ptr to account for the edge case missed by the implicit deduction guides.
#include <memory>
int main()
{
auto p = std::make_shared<int>(42);
std::weak_ptr w{p}; // explicit deduction guide is used in this case
}
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