(Fget_char_property_and_overlay): New function.

(syms_of_textprop): Defsubr it.

src/textprop.c

@@ -703,6 +703,30 @@ overlays are considered only if they are associated with OBJECT.  */)
 {
   return get_char_property_and_overlay (position, prop, object, 0);
 }
+
+DEFUN ("get-char-property-and-overlay", Fget_char_property_and_overlay,
+       Sget_char_property_and_overlay, 2, 3, 0,
+       doc: /* Like `get-char-property', but with extra overlay information.
+Return a cons whose car is the return value of `get-char-property'
+with the same arguments, that is, the value of POSITION's property
+PROP in OBJECT, and whose cdr is the overlay in which the property was
+found, or nil, if it was found as a text property or not found at all.
+OBJECT is optional and defaults to the current buffer.  OBJECT may be
+a string, a buffer or a window.  For strings, the cdr of the return
+value is always nil, since strings do not have overlays.  If OBJECT is
+a window, then that window's buffer is used, but window-specific
+overlays are considered only if they are associated with OBJECT.  If
+POSITION is at the end of OBJECT, both car and cdr are nil.  */)
+     (position, prop, object)
+     Lisp_Object position, object;
+     register Lisp_Object prop;
+{
+  Lisp_Object overlay;
+  Lisp_Object val
+    = get_char_property_and_overlay (position, prop, object, &overlay);
+  return Fcons(val, overlay);
+}
+
 
 DEFUN ("next-char-property-change", Fnext_char_property_change,
        Snext_char_property_change, 1, 2, 0,
@@ -2277,6 +2301,7 @@ rear-nonsticky properties of the character overrides NONSTICKINESS.  */);
   defsubr (&Stext_properties_at);
   defsubr (&Sget_text_property);
   defsubr (&Sget_char_property);
+  defsubr (&Sget_char_property_and_overlay);
   defsubr (&Snext_char_property_change);
   defsubr (&Sprevious_char_property_change);
   defsubr (&Snext_single_char_property_change);