deductionguidesforstd::weak_ptr(3) | C++ Standard Libary | deductionguidesforstd::weak_ptr(3) |
NAME¶
deductionguidesforstd::weak_ptr - deductionguidesforstd::weak_ptr
Synopsis¶
Defined in header <memory>
template<class T> (since C++17)
weak_ptr(std::shared_ptr<T>) -> weak_ptr<T>;
One deduction guide is provided for std::weak_ptr to account for the edge
case
missed by the implicit deduction guides.
Example¶
// Run this code
#include <memory>
int main()
{
auto p = std::make_shared<int>(42);
std::weak_ptr w{p}; // explicit deduction guide is used in this case
}
2022.07.31 | http://cppreference.com |