# std::hash(std::experimental::propagate_const)

From cppreference.com
< cpp‎ | experimental‎ | propagate const

Defined in header `<experimental/propagate_const>` |  |
template<class T> struct hash<std::experimental::propagate_const<T>>; |  | (library fundamentals TS v2)

The template specialization of std::hash for std::experimental::propagate_const<T> allows users to obtain hashes of objects of type std::experimental::propagate_const<T>.

For a given std::experimental::propagate_const<T> p, this specialization ensures that std::hash<std::experimental::propagate_const<T>>()(p) == std::hash<T>()(p.t_), where p.t_ is the pointer-like object wrapped by `p`.

### Example

| This section is incomplete Reason: no example

### See also

hash (C++11) | hash function object (class template)

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/propagate_const/hash&oldid=79558"
Category:

- Todo no example