#ifndef SCM_BOOLEAN_H
#define SCM_BOOLEAN_H
-/* Copyright (C) 1995,1996,2000, 2006, 2008, 2009, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,2000, 2006, 2008, 2009, 2010, 2013 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
(SCM_MATCHES_BITS_IN_COMMON ((x), SCM_ELISP_NIL, SCM_BOOL_F))
#define scm_is_true_and_not_nil(x) (!scm_is_false_or_nil (x))
-/*
-#nil is false. */
+/* #nil is false. */
#define scm_is_false(x) (scm_is_false_or_nil (x))
#define scm_is_true(x) (!scm_is_false (x))
\f
+/* Older spellings for the above routines, kept around for
+ compatibility. */
+#define SCM_FALSEP(x) (scm_is_false (x))
+#define SCM_NFALSEP(x) (scm_is_true (x))
+#define SCM_BOOLP(x) (scm_is_bool (x))
+#define SCM_BOOL(x) (scm_from_bool (x))
+#define SCM_NEGATE_BOOL(f) (scm_from_bool (!(f)))
+#define SCM_BOOL_NOT(x) (scm_not (x))
+
+\f
+
/*
* The following macros efficiently implement boolean truth testing as
* expected by most lisps, which treat '() aka SCM_EOL as false.
SCM_API SCM scm_not (SCM x);
SCM_API SCM scm_boolean_p (SCM obj);
+SCM_API SCM scm_nil_p (SCM obj);
SCM_INTERNAL void scm_init_boolean (void);