svref

ToC

Allegro CL

ANSI Common Lisp

15 Arrays

15.2 Dictionary of Arrays

15.2.28 svref

Accessor

Syntax:

svref simple-vector index

element

(setf (svref simple-vector index) new-element)

Arguments and Values:

simple-vector - a simple vector.

index - a valid array index for the simple-vector.

element, new-element - an object (whose type is a subtype of the array element type of the simple-vector).

Description:

Accesses the element of simple-vector specified by index.

Examples:

 (simple-vector-p (setq v (vector 1 2 'sirens)))  true
 (svref v 0)  1
 (svref v 2)   SIRENS
 (setf (svref v 1) 'newcomer)   NEWCOMER               
 v  #(1 NEWCOMER SIRENS)

See Also:

aref, sbit, schar, vector, Section 3.2.1 Compiler Terminology

Notes:

svref is identical to aref except that it requires its first argument to be a simple vector.

 (svref v i) ==(aref (the simple-vector v) i)

Allegro CL Implementation Details:

None.