| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: feature-or-list-of-features
This function returns true if the argument correctly describes the
state of the
*features*
list and nil
if it does
not. feature-or-list-of-features can be any atom
or list acceptable to the reader macros #+ and #- (and so can include
not, and and or and can contain
sublists). Note that the :version>=
extension used by
Allegro CL is often useful (see
Reader macros and
cl:*features* in implementation.htm). The
Allegro CL style is for features to be keywords. If the argument is an
atom, the subsequence of
*features*
starting at that
feature is returned if it is present and nil
if it is not.
Examples:
(excl:featurep :gsgc) -> (:gsgc :clos ...) (excl:featurep :foo) -> nil (excl:featurep '(and (or :unix :foo))) -> t
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 |