CHAR-CODE takes values from 0 (inclusive) to CHAR-CODE-LIMIT (exclusive), i.e., the implementation supports exactly CHAR-CODE-LIMIT characters.

The types EXT:STRING-CHAR and BASE-CHAR are equivalent to CHARACTER. EXT:STRING-CHAR used to be available as STRING-CHAR prior to removal from [ANSI CL] by CHARACTER-PROPOSAL:2.

(EXT:CHAR-WIDTH char) returns the number of screen columns occupied by char. This is 0 for non-spacing characters (such as control characters and many combining characters), 2 for double-width East Asian characters, and 1 for all other characters. See also function EXT:STRING-WIDTH.