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-rw-r--r--libguile/boolean.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/libguile/boolean.h b/libguile/boolean.h
index 7084fdf29..8f55f1ee5 100644
--- a/libguile/boolean.h
+++ b/libguile/boolean.h
@@ -56,8 +56,7 @@
(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))
@@ -91,6 +90,17 @@ SCM_API int scm_to_bool (SCM x);
+/* 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))
+
+
+
/*
* The following macros efficiently implement boolean truth testing as
* expected by most lisps, which treat '() aka SCM_EOL as false.