std::map<std::string, Id> imported_extension_ids;
std::map<Node *, Declaration> declared_ids;
std::map<std::string, Id> declared_uniform_ids;
+ std::map<unsigned, Id> declared_spec_ids;
std::map<TypeKey, Id> standard_type_ids;
std::map<Id, Id> image_type_ids;
std::map<TypeKey, Id> array_type_ids;