svref (ANSI and GNU Common Lisp Document)

Next: vector, Previous: simple-vector-p, Up: Arrays Dictionary

#### 15.2.28 svref [Accessor]

`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 ,

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)