Apropos

copy-symbolFunction

    Syntax

    copy-symbol symbol &optional copy-properties new-symbol

    Arguments and Values

    symbol — a symbol.

    copy-properties — a generalized boolean. The default is false.

    new-symbol — a fresh, uninterned symbol.

    Description

    copy-symbol returns a fresh, uninterned symbol, the name of which is string= to and possibly the same as the name of the given symbol.

    If copy-properties is false, the new-symbol is neither bound nor fbound and has a null property list. If copy-properties is true, then the initial value of new-symbol is the value of symbol, the initial function definition of new-symbol is the functional value of symbol, and the property list of new-symbol is a copy2 of the property list of symbol.

    Examples
    (setq fred 'fred-smith)  FRED-SMITH 
    (setf (symbol-value fred) 3)  3 
    (setq fred-clone-1a (copy-symbol fred nil))  #:FRED-SMITH 
    (setq fred-clone-1b (copy-symbol fred nil))  #:FRED-SMITH 
    (setq fred-clone-2a (copy-symbol fred t))    #:FRED-SMITH 
    (setq fred-clone-2b (copy-symbol fred t))    #:FRED-SMITH 
    (eq fred fred-clone-1a)  false 
    (eq fred-clone-1a fred-clone-1b)  false 
    (eq fred-clone-2a fred-clone-2b)  false 
    (eq fred-clone-1a fred-clone-2a)  false 
    (symbol-value fred)  3 
    (boundp fred-clone-1a)  false 
    (symbol-value fred-clone-2a)  3 
    (setf (symbol-value fred-clone-2a) 4)  4 
    (symbol-value fred)  3 
    (symbol-value fred-clone-2a)  4 
    (symbol-value fred-clone-2b)  3 
    (boundp fred-clone-1a)  false 
    (setf (symbol-function fred) #'(lambda (x) x))  #<FUNCTION anonymous> 
    (fboundp fred)  true 
    (fboundp fred-clone-1a)  false 
    (fboundp fred-clone-2a)  false
    Exceptional Situations

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

    See Also

    make-symbol

    Notes

    Implementors are encouraged not to copy the string which is the symbol’s name unnecessarily. Unless there is a good reason to do so, the normal implementation strategy is for the new-symbol’s name to be identical to the given symbol’s name.