makunbound

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10.2.18 makunbound Function

Syntax:

makunbound symbol symbol

Arguments and Values:

symbol - a symbol

Description:

Makes the symbol be unbound, regardless of whether it was previously bound.

Examples:

 (setf (symbol-value 'a) 1)
 (boundp 'a) true
 a 1
 (makunbound 'a) A
 (boundp 'a) false

Side Effects:

The value cell of symbol is modified.

Exceptional Situations:

Should signal an error of type type-error if symbol is not a symbol.

See Also:

boundp, fmakunbound

Allegro CL Implementation Details:

None.