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

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< 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)

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