| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: object
Returns t
if the argument is a box object and
returns nil
otherwise.
See the description of the make-box for more information on boxes.
boxp should not be called on objects created by the macros with-boxes and with-positions-and-boxes. The return value of those functions is undefined for objects created by the macros because type information for such objects is sacrificed to achieve the non-consing efficiency of stack allocation.
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |