Compile-time Fowler–Noll–Vo hash of strings. StringHash("Test").GetHash() will be compiled into an unsigned int hash at compile-time.

FnvHash.hpp

template<unsigned int N, unsigned int I>
struct FnvHash
{
	inline static unsigned int Hash(const char (&str)[N])
	{
		return (FnvHash<N,I-1>::Hash(str) ^ str[I-1]) * 16777619u;
	}
};

template<unsigned int N>
struct FnvHash<N,1>
{
	inline static unsigned int Hash(const char (&str)[N])
	{
		return (2166136261u ^ str[0]) * 16777619u;
	}
};

class StringHash
{
public:
	template<unsigned int N>
	inline StringHash(const char (&str)[N])
	: m_hash(FnvHash<N,N>::Hash(str))
	{

	}
	unsigned int GetHash()
	{
		return m_hash;
	}
private:
	unsigned int m_hash;
};