+
+* variadic macros
+* predefined macros
+ * __COUNTER__ counter starting from 0, incremented each time expanded
+ * __BASE_FILE__ current PSI file
+ * __INCLUDE_LEVEL__ include level
+ * __TIMESTAMP__ lmod of current source file
+* builtins
+* int128
+* very small real numbers
+* cache tokens of files and copy tokens if used for further processing