gcc/cp/call.c

2838   tree fromtype = TREE_TYPE (expr);
2850   gcc_assert (!MAYBE_CLASS_TYPE_P (fromtype) || !MAYBE_CLASS_TYPE_P (totype)
2851 	      || !DERIVED_FROM_P (totype, fromtype));
2856   if (MAYBE_CLASS_TYPE_P (fromtype))
2859       if (same_type_ignoring_top_level_qualifiers_p (to_nonref, fromtype) ||
2860 	  (CLASS_TYPE_P (to_nonref) && CLASS_TYPE_P (fromtype)
2861 	   && DERIVED_FROM_P (to_nonref, fromtype)))
2870 	conv_fns = lookup_conversions (fromtype);
2971 	     So we pass fromtype as CTYPE to add_*_candidate.  */
2974 	    cand = add_template_candidate (&candidates, fn, fromtype,
2977 					   TYPE_BINFO (fromtype),
2982 	    cand = add_function_candidate (&candidates, fn, fromtype,
2984 					   TYPE_BINFO (fromtype),
3030 		    fromtype, totype);