std::map<std::string, std::set<unsigned> > used_locations;
std::map<std::string, Uniform> uniforms;
std::map<unsigned, std::set<unsigned> > used_bindings;
std::map<std::string, std::set<unsigned> > used_locations;
std::map<std::string, Uniform> uniforms;
std::map<unsigned, std::set<unsigned> > used_bindings;