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  ANSI Common Lisp   10 Symbols   10.2 Dictionary of Symbols

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.

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