1 // { dg-options "-std=gnu++11" }
4 // Copyright (C) 2012-2013 Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3. If not see
19 // <http://www.gnu.org/licenses/>.
25 template < typename ...Types >
31 static auto optioned_types() -> std::array<std::type_index, 0>
32 { return std::array<std::type_index, 0>{ {} }; }
35 template < typename Head, typename ...Tail >
36 union super_union<Head, Tail...>
39 auto optioned_types() -> std::array<std::type_index, 1 + sizeof...(Tail)>
41 using std::type_index;
43 return { {type_index(typeid(Head)), type_index(typeid(Tail))...} };
47 super_union<Tail...> rest;