#pragma once

#include <sha256_literal.h>

#include "util.hh"

namespace types {
	// A very basic typeid: Using the constexpr __PRETTY_FUNCTION__ array slicing trick we used for `exopt::util::type_name<T>()`, we can extract the unmangled, de-aliased type name T, we can then hash that at comptime, and give it static storage: Therefore __PRETTY_FUNCTION__ will not be given storage, but the resulting (far smaller, but still *almost* unique to each type name) hash, will be.

	using util::type_name;

	template<typename T>
	struct type_hash_of {
		// Give *only* the computed hash static storage duration, not the type name.
		constexpr static inline auto value = sha256::compute(util::type_name_literal<T>());
	};

	/// Returns a (semi) unique SHA256 hash representing the type `T`.
	/// 
	/// NOTE: This hash is given static storage duration, but nothing else used to calculate it is. Therefore executable bloat is not a concern for values obtained from this function.
	template<typename T>
	constexpr const auto& type_hash() noexcept {
		constexpr const auto& value = type_hash_of<T>::value;
		return value;
	}

	template<typename T>
	constexpr inline auto& type_hash_v = type_hash_of<T>::value;
}