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  ANSI Common Lisp   4 Types and Classes   4.4 Dictionary of Types and Classes

4.4.20 and Type Specifier

Compound Type Specifier Kind:

Compound Type Specifier Syntax:
(and {typespec}*)

Compound Type Specifier Arguments:
typespec - a type specifier.

Compound Type Specifier Description:
This denotes the set of all objects of the type determined by the intersection of the typespecs.

* is not permitted as an argument.

The type specifiers (and) and t are equivalent. The symbol and is not valid as a type specifier, and, specifically, it is not an abbreviation for (and).

Allegro CL Implementation Details:

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