+ /* Warn about initializer_list deduction that isn't currently in the
+ working draft. */
+ if (cxx_dialect > cxx98
+ && flag_deduce_init_list
+ && cand->template_decl
+ && is_std_init_list (non_reference (type)))
+ {
+ tree tmpl = TI_TEMPLATE (cand->template_decl);
+ tree realparm = chain_index (j, DECL_ARGUMENTS (cand->fn));
+ tree patparm = get_pattern_parm (realparm, tmpl);
+ tree pattype = TREE_TYPE (patparm);
+ if (PACK_EXPANSION_P (pattype))
+ pattype = PACK_EXPANSION_PATTERN (pattype);
+ pattype = non_reference (pattype);
+
+ if (!is_std_init_list (pattype))
+ {
+ pedwarn (input_location, 0, "deducing %qT as %qT",
+ non_reference (TREE_TYPE (patparm)),
+ non_reference (type));
+ pedwarn (input_location, 0, " in call to %q+D", cand->fn);
+ pedwarn (input_location, 0,
+ " (you can disable this with -fno-deduce-init-list)");
+ }
+ }
+