+
+translation_unit_t *parse(void);
+
+type_t *revert_automatic_type_conversion(const expression_t *expression);
+
+/* some builtin types */
+extern type_t *type_wchar_t;
+extern type_t *type_size_t;
+extern type_t *type_ptrdiff_t;
+extern type_t *type_wchar_ptr_t;