4.1. Types [sec_4-2]

4.1.1. Type Specifiers

4.1.1. Type Specifiers [sec_4-2-3]

The general form of the COMPLEX type specifier is (COMPLEX type-of-real-part type-of-imaginary-part). The type specifier (COMPLEX type) is equivalent to (COMPLEX type type).

DEFTYPE lambda lists are subject to destructuring (nested lambda lists are allowed, as in DEFMACRO) and may contain a &WHOLE marker, but not an &ENVIRONMENT marker.

Function (EXT:TYPE-EXPAND type &OPTIONAL once-p). If type is a user-defined type specifier this will expand it recursively until it is no longer a user-defined type (unless once-p is supplied and non-NIL). Two values are returned - the expansion and an indicator (T or NIL) of whether the original type was a user-defined type specifier.

Function COERCEFIXNUM is not a character designator in [ANSI CL standard], although CODE-CHAR provides an obvious venue to COERCE a FIXNUM to a CHARACTER. When CUSTOM:*COERCE-FIXNUM-CHAR-ANSI* is NIL, CLISP COERCEs FIXNUMs to CHARACTERs via CODE-CHAR. When CUSTOM:*COERCE-FIXNUM-CHAR-ANSI* is non-NIL, FIXNUMs cannot be COERCEd to CHARACTERs.

These notes document CLISP version 2.49Last modified: 2010-07-07