libstdc++-v3/testsuite/20_util/common_type/requirements/explicit_instantiation.cc

   1 // { dg-options "-std=gnu++0x" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2008 Free Software Foundation, Inc.
   5 //
   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 2, or (at your option)
  10 // any later version.
  11
  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.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 // NB: This file is for testing type_traits with NO OTHER INCLUDES.
  32
  33 #include <type_traits>
  34
  35 namespace std
  36 {
  37   typedef int test_type1;
  38   typedef int& test_type2;
  39   typedef double test_type3;
  40   typedef float test_type4;
  41
  42   template struct common_type<test_type1>;
  43   template struct common_type<test_type1, test_type2>;
  44   template struct common_type<test_type1, test_type2, test_type3>;
  45   template struct common_type<test_type1, test_type2, test_type3, test_type4>;
  46 }