std::shared_ptr
Defined in header <memory> | ||
---|---|---|
template< class T > shared_ptr( std::weak_ptr<T> ) -> shared_ptr<T>; | (1) | (since C++17) |
template< class T, class D > shared_ptr( std::unique_ptr<T, D> ) -> shared_ptr<T>; | (2) | (since C++17) |
These deduction guides are provided for std::shared_ptr
to account for the edge cases missed by the implicit deduction guides.
Note that there is no class template argument deduction from pointer types because it is impossible to distinguish pointers obtained from array and non-array forms of new
.
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/memory/shared_ptr/deduction_guides