std::hash std::experimental::optional - cppreference.com (original) (raw)
The template specialization of std::hash for the std::experimental::optional class allows users to obtain hashes of the values contained in optional objects.
[edit] Template parameters
| T | - | the type of the value contained in optional object. The specialization std::hash<T> must meet the requirements of class template hash. |
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[edit] Example
[edit] See also
| | hash function object (class template) [edit] | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |