+type_t *make_atomic_type(atomic_type_kind_t type, type_qualifiers_t qualifiers);
+type_t *make_complex_type(atomic_type_kind_t type, type_qualifiers_t qualifiers);
+type_t *make_imaginary_type(atomic_type_kind_t type, type_qualifiers_t qualifiers);
+type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers);
+type_t *make_array_type(type_t *element_type, size_t size,
+ type_qualifiers_t qualifiers);
+
+type_t *duplicate_type(const type_t *type);
+
+static inline bool is_typeref(const type_t *type)
+{
+ return type->kind == TYPE_TYPEDEF || type->kind == TYPE_TYPEOF;
+}
+
+static inline bool is_type_atomic(const type_t *type, atomic_type_kind_t atype)
+{
+ assert(!is_typeref(type));
+
+ if(type->kind != TYPE_ATOMIC)
+ return false;
+ const atomic_type_t *atomic_type = &type->atomic;
+
+ return atomic_type->akind == atype;
+}
+
+static inline bool is_type_pointer(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind == TYPE_POINTER;
+}
+
+static inline bool is_type_array(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind == TYPE_ARRAY;
+}
+
+static inline bool is_type_function(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind == TYPE_FUNCTION;
+}
+
+static inline bool is_type_union(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind == TYPE_COMPOUND_UNION;
+}
+
+static inline bool is_type_struct(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind == TYPE_COMPOUND_STRUCT;
+}
+
+static inline bool is_type_builtin(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind == TYPE_BUILTIN;
+}
+
+static inline bool is_type_compound(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind == TYPE_COMPOUND_STRUCT
+ || type->kind == TYPE_COMPOUND_UNION;
+}
+
+static inline bool is_type_valid(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind != TYPE_ERROR;
+}