Hyperiso/hash__utils_8hpp_source.html

#ifndef HASH_UTILS_H

#define HASH_UTILS_H


#include <utility>

#include <cstddef>


struct PairHash {


    std::size_t operator()(const std::pair<int,int>& p) const noexcept {

        std::size_t h = static_cast<std::size_t>(p.first);

        h ^= (static_cast<std::size_t>(p.second) + 0x9e3779b97f4a7c15ULL + (h<<6) + (h>>2));

        return h;

    }


};


#endif

PairHash
Hash functor for std::pair<int,int>.
Definition hash_utils.hpp:34

PairHash::operator()
std::size_t operator()(const std::pair< int, int > &p) const noexcept
Computes a hash value for a pair of integers.
Definition hash_utils.hpp:45