gcc/cp/search.c

1817   tree base_return = TREE_TYPE (base_type);
1825   if (same_type_p (base_return, over_return))
1827   else if ((CLASS_TYPE_P (over_return) && CLASS_TYPE_P (base_return))
1828 	   || (TREE_CODE (base_return) == TREE_CODE (over_return)
1829 	       && POINTER_TYPE_P (base_return)))
1834       fail = !POINTER_TYPE_P (base_return);
1837 	  fail = cp_type_quals (base_return) != cp_type_quals (over_return);
1839 	  base_return = TREE_TYPE (base_return);
1842       base_quals = cp_type_quals (base_return);
1848       if (CLASS_TYPE_P (base_return) && CLASS_TYPE_P (over_return))
1850 	  tree binfo = lookup_base (over_return, base_return,