deduction guides for std::weak_ptr
From cppreference.com
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.
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 }