tmp/tmpzjbrq3dw/{from.md → to.md}
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### Hash support <a id="variant.hash">[[variant.hash]]</a>
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``` cpp
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template <class... Types> struct hash<variant<Types...>>;
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```
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The specialization `hash<variant<Types...>>` is
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enabled ([[unord.hash]]) if and only if every specialization in
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`hash<remove_const_t<Types>>...` is enabled. The member functions are
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not guaranteed to be `noexcept`.
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``` cpp
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template <> struct hash<monostate>;
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```
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The specialization is enabled ([[unord.hash]]).
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