The
following table provides summary descriptions of the AutoLISP symbol-handling
functions.
Symbol-handling
functions
|
Function
|
Description
|
(atom item)
|
Verifies
that an item is an atom
|
(atoms-family format
[symlist])
|
Returns
a list of the currently defined symbols
|
(boundp sym)
|
Verifies
whether a value is bound to a symbol
|
(not item)
|
Verifies
that an item evaluates to nil
|
(null item)
|
Verifies
that an item is bound to nil
|
(numberp item)
|
Verifies
that an item is a real or an integer
|
(quote expr)
|
Returns
an expression without evaluating it
|
(set sym expr)
|
Sets the
value of a quoted symbol name to an expression
|
(setq sym1 expr1 [sym2
expr2] ...)
|
Sets the
value of a symbol or symbols to associated expressions
|
(type item)
|
Returns
the type of a specified item
|
(vl-symbol-name symbol)
|
Returns
a string containing the name of a symbol
|
(vl-symbol-value symbol)
|
Returns
the current value bound to a symbol
|
(vl-symbolp object)
|
Identifies whether or not
a specified object is a symbol
|
