std::hash (std::string, std::wstring, std::u16string, std::u32string)

 

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hash<std::string> hash<std::wstring> hash<std::u32string> hash<std::u16string> (C++11)

 

definiert in Header <string>
template<>struct hash<std::string>; template<>struct hash<std::wstring>; template<>struct hash<std::u16string>; template<>struct hash<std::u32string>;		(seit C++11)

The template specializations of std::hash for the various string classes allow users to obtain hashes of strings.

Beispiel

The following code shows one possible output of a hash function used on a string:

#include <iostream>#include <string>#include <functional>   int main(){std::string s ="Stand back! I've got jimmies!";std::hash<std::string> hash_fn;   size_t hash = hash_fn(s);   std::cout<< hash <<'\n';}

Output:

325378910

Siehe auch

hash (C++11)	Funktionsobjekt zur Erzeugung von Hashwerten (Klassen-Template)