Function MakeHashKey

src/cache.cpp:43–45

namespace {
	std::string MakeHashKey(std::string_view folder_name, std::string_view filename, bool transparent) {
		return ToString(folder_name) + ":" + ToString(filename) + ":" + (transparent ? "T" : " ");
	}

	std::string MakeTileHashKey(std::string_view chipset_name, int id) {
		std::string key;