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authorMark H Weaver <mhw@netris.org>2012-02-14 02:14:10 -0500
committerMark H Weaver <mhw@netris.org>2012-02-15 11:23:27 -0500
commit76b9bac565182dd7d0ffe416c3382ac7d59d93ab (patch)
tree10f39a44fdefc7598828f819b161a59d1231d775 /libguile/srcprop.c
parentfb3a112122b6406e88adbff2299aacc5230cc8ec (diff)
downloadguile-76b9bac565182dd7d0ffe416c3382ac7d59d93ab.tar.gz
Add 'supports-source-properties?' predicate
* libguile/srcprop.c (scm_supports_source_properties_p): New procedure. (supports_source_props): New static C function. * libguile/srcprop.h (scm_supports_source_properties_p): Add prototype. * doc/ref/api-debug.texi (Source Properties): Add documentation.
Diffstat (limited to 'libguile/srcprop.c')
-rw-r--r--libguile/srcprop.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/libguile/srcprop.c b/libguile/srcprop.c
index c43acdf95..c632bb0c5 100644
--- a/libguile/srcprop.c
+++ b/libguile/srcprop.c
@@ -94,6 +94,14 @@ static SCM scm_srcprops_to_alist (SCM obj);
scm_t_bits scm_tc16_srcprops;
+
+static int
+supports_source_props (SCM obj)
+{
+ return SCM_NIMP (obj) && !scm_is_symbol (obj) && !scm_is_keyword (obj);
+}
+
+
static int
srcprops_print (SCM obj, SCM port, scm_print_state *pstate)
{
@@ -160,6 +168,16 @@ scm_srcprops_to_alist (SCM obj)
return alist;
}
+SCM_DEFINE (scm_supports_source_properties_p, "supports-source-properties?", 1, 0, 0,
+ (SCM obj),
+ "Return #t if @var{obj} supports adding source properties,\n"
+ "otherwise return #f.")
+#define FUNC_NAME s_scm_supports_source_properties_p
+{
+ return scm_from_bool (supports_source_props (obj));
+}
+#undef FUNC_NAME
+
SCM_DEFINE (scm_source_properties, "source-properties", 1, 0, 0,
(SCM obj),
"Return the source property association list of @var{obj}.")