cons (System Class)

Class Precedence List:

cons, list, sequence, t

Description:

A cons is a compound object having two components, called the car and cdr. These form a dotted pair. Each component can be any object.

Compound Type Specifier Kind:

Specializing.

Compound Type Specifier Syntax:

(cons [car-typespec [cdr-typespec]])

Compound Type Specifier Arguments:

car-typespec—a type specifier, or the symbol *. The default is the symbol *.

cdr-typespec—a type specifier, or the symbol *. The default is the symbol *.

Compound Type Specifier Description:

This denotes the set of conses whose car is constrained to be of type car-typespec and whose cdr is constrained to be of type cdr-typespec. (If either car-typespec or cdr-typespec is *, it is as if the type t had been denoted.)

See Also:

Section 2.4.1 (Left-Parenthesis), Section 22.1.3.5 (Printing Lists and Conses)