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Function VECTOR-POP

Syntax:

vector-pop vector => element

Arguments and Values:

vector---a vector with a fill pointer.

element---an object.

Description:

Decreases the fill pointer of vector by one, and retrieves the element of vector that is designated by the new fill pointer.

Examples:

     (vector-push (setq fable (list 'fable))
                  (setq fa (make-array 8
                                       :fill-pointer 2
                                       :initial-element 'sisyphus))) =>  2
     (fill-pointer fa) =>  3
     (eq (vector-pop fa) fable) =>  true
     (vector-pop fa) =>  SISYPHUS
     (fill-pointer fa) =>  1

Side Effects:

The fill pointer is decreased by one.

Affected By:

The value of the fill pointer.

Exceptional Situations:

An error of type type-error is signaled if vector does not have a fill pointer.

If the fill pointer is zero, vector-pop signals an error of type error.

See Also:

vector-push, vector-push-extend, fill-pointer

Notes: None.

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