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
The documentation is described in introduction.htm and the index is in index.htm.
Copyright (c) 1998-2000, Franz Inc. Berkeley, CA., USA. All rights reserved.
Created 2000.10.5.