A string switch impl in c++

beautiful_switch.cpp

#include <iostream>
// based on https://stackoverflow.com/a/46711735/5921729

constexpr inline
long long int hash(char const * str, int h = 0)
{
    return (!str[h] ? 5381 : (hash(str, h+1)*33) ^ str[h] );
}

constexpr inline
long long int operator "" _(char const * p, size_t) { return hash(p); }

inline
long long int hash(std::string const & s) { return hash (s.c_str()); }


int main()
{
    std::string cat{"Peter"};
    switch (hash(cat))
    {
        case "Peter"_:
        {
            std::cout << "Cat's name is Peter\n";
            break;
        }
        case "Jacky"_:
        {
            std::cout << "Cat's name is Jacky\n";
            break;
        }
    }
}