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std::hash

std：：散列%28std：：string[医]视图，STD：：wstring[医]视图，std：：u16string[医]视图，STD：：u32string[医]视图%29

Defined in header ​​
template<> struct hash<std::string_view>; template<> struct hash<std::wstring_view>; template<> struct hash<std::u16string_view>; template<> struct hash<std::u32string_view>;​(since C++17)

模板的专门化std::hash用于哈希视图的各种视图类。

These hashes equal the hashes of corresponding std::basic_string classes: If S is one of the standard basic_string types, SV is the corresponding string view type, and s is an object of type S, then std::hash()(s) == std::hash()(SV(s)).(since C++17)

另见

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

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