std::hash <std::variant>
From cppreference.com
| Defined in header
<variant>
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| template <class... Types>
struct hash<std::variant<Types...>>; |
(since C++17) | |
The template specialization of std::hash for the std::variant template allows users to obtain hashes of variant objects.
Contents |
[edit] Template parameters
| Types | - | the types of the alternatives supported by the variant object
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| Type requirements | ||
-The specializations std::hash<T_i> must satisfy Hash for all T_i in Types....
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[edit] Notes
Unlike std::hash<std::optional>, hash of a variant does not typically equal the hash of the contained value; this makes it possible to distinguish std::variant<int, int> holding the same value as different alternatives.
[edit] Example
| This section is incomplete Reason: no example |
[edit] See also
| (C++11)
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hash function object (class template) |