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author | Mark H Weaver <mhw@netris.org> | 2012-02-14 02:14:10 -0500 |
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committer | Mark H Weaver <mhw@netris.org> | 2012-02-15 11:23:27 -0500 |
commit | 76b9bac565182dd7d0ffe416c3382ac7d59d93ab (patch) | |
tree | 10f39a44fdefc7598828f819b161a59d1231d775 /libguile/srcprop.c | |
parent | fb3a112122b6406e88adbff2299aacc5230cc8ec (diff) | |
download | guile-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.c | 18 |
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}.") |