C++11 compile-time hash of literal strings.

lithash.cpp

#include <cstdint>

namespace detail
{
    // FNV-1a 32bit hashing algorithm.
    constexpr std::uint32_t fnv1a_32(char const* s, std::size_t count)
    {
        return ((count ? fnv1a_32(s, count - 1) : 2166136261u) ^ s[count]) * 16777619u;
    }
}    // namespace detail

constexpr std::uint32_t operator"" _hash(char const* s, std::size_t count)
{
    return detail::fnv1a_32(s, count);
}

constexpr std::uint32_t check = "0123456789ABCDEF"_hash;

int main()
{
    // Compare against precomputed value.
    static_assert(check == 141695047u, "bad hash value");
    return 0;
}

A comprehensive list of general purpose hash functions and their implementations can found here:

https://www.partow.net/programming/hashfunctions/index.html