hash.h

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#ifndef HASH_H
#define HASH_H
 
#include <utility>
 
namespace mazes {
 
 
struct pair_hash {
 
    template <class T1, class T2>
    std::size_t operator()(const std::pair<T1, T2>& p) const {
        auto hash1 = std::hash<T1>{}(std::get<0>(p));
        auto hash2 = std::hash<T1>{}(std::get<1>(p));
        return hash1 ^ hash2;
    }
}; // pair_hash
} // namespace
 
#endif // HASH_H