svref (Accessor)

Syntax:

(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 (Function), 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)