A compile-time Bernstein hash example using constexpr (c++11 or above).

constexpr_bernstein_hash.cc

#include <cstddef>
#include <iostream>

constexpr std::size_t bernstein_hash(char const *s, std::size_t size, std::size_t value = 5381) {
    return size ? bernstein_hash(s + 1, size - 1, 33 * value + *s) : value;
}

struct symbol {
    std::size_t const len;
    std::size_t const hash;
    char const * const str;

    template<std::size_t N>
    constexpr symbol(char const (&s)[N]) noexcept : len{N - 1}, hash{bernstein_hash(s, len)}, str{s} {}

};


int main() {

    symbol name("Bernstein");

    std::cout << name.str << std::endl;
    std::cout << name.hash << std::endl;

    return 0;
}