...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
For the full specification, see section 6.3 of the C++ Standard Library Technical Report and issue 6.18 of the Library Extension Technical Report Issues List (page 63).
Defines boost::hash
,
and helper functions.
namespace boost { template<typename T> struct hash; template<> struct hash<bool>; template<> struct hash<char>; template<> struct hash<signed char>; template<> struct hash<unsigned char>; template<> struct hash<wchar_t>; template<> struct hash<short>; template<> struct hash<unsigned short>; template<> struct hash<int>; template<> struct hash<unsigned int>; template<> struct hash<long>; template<> struct hash<unsigned long>; template<> struct hash<long long>; template<> struct hash<unsigned long long>; template<> struct hash<float>; template<> struct hash<double>; template<> struct hash<long double>; template<> struct hash<std::string>; template<> struct hash<std::wstring>; template<typename T> struct hash<T*>; template<typename T> void hash_combine(size_t &, T const&); template<typename It> std::size_t hash_range(It, It); template<typename It> void hash_range(std::size_t&, It, It); std::size_t hash_value(bool); std::size_t hash_value(char); std::size_t hash_value(signed char); std::size_t hash_value(unsigned char); std::size_t hash_value(wchar_t); std::size_t hash_value(short); std::size_t hash_value(unsigned short); std::size_t hash_value(int); std::size_t hash_value(unsigned int); std::size_t hash_value(long); std::size_t hash_value(unsigned long); std::size_t hash_value(long long); std::size_t hash_value(unsigned long long); std::size_t hash_value(float); std::size_t hash_value(double); std::size_t hash_value(long double); template<typename T> std::size_t hash_value(T* const&); template<typename T, unsigned N> std::size_t hash_value(T (&val)[N]); template<typename T, unsigned N> std::size_t hash_value(const T (&val)[N]); template<typename Ch, typename A> std::size_t hash_value(std::basic_string<Ch, std::char_traits<Ch>, A> const&); template<typename A, typename B> std::size_t hash_value(std::pair<A, B> const&); template<typename T, typename A> std::size_t hash_value(std::vector<T, A> const&); template<typename T, typename A> std::size_t hash_value(std::list<T, A> const&); template<typename T, typename A> std::size_t hash_value(std::deque<T, A> const&); template<typename K, typename C, typename A> std::size_t hash_value(std::set<K, C, A> const&); template<typename K, typename C, typename A> std::size_t hash_value(std::multiset<K, C, A> const&); template<typename K, typename T, typename C, typename A> std::size_t hash_value(std::map<K, T, C, A> const&); template<typename K, typename T, typename C, typename A> std::size_t hash_value(std::multimap<K, T, C, A> const&); template<typename T> std::size_t hash_value(std::complex<T> const&); }