copy
copy — makes a copy of the top list level of a list.
Arguments
- s_exp
Any Gamma or Lisp expression.
Returns
A copy of the top list level of the argument.
Description
This function makes a copy of the top list level of the
argument if the argument is a list, otherwise it simply
returns the argument. This produces a new list which is
equal to the previous list, and whose elements are eq.
That is, the elements are not copied but simply reside in
both the original and the copy.
Example
Gamma> a = list(1, list(2,3,list(4),5));
(1 (2 3 (4) 5))
Gamma> b = copy(a);
(1 (2 3 (4) 5))
Gamma> cadr(a);
(2 3 (4) 5)
Gamma> equal(cadr(a),cadr(b));
t
Gamma> eq(cadr(a),cadr(b));
t
Gamma>
