libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-1.cc

   1 // { dg-options "-std=gnu++11" }
   2 // { dg-do compile }
   3
   4 // 2007-05-03  Benjamin Kosnik  <bkoz@redhat.com>
   5 //
   6 // Copyright (C) 2007-2016 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13 //
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 #include <type_traits>
  24
  25 enum test_enum { first_selection };
  26
  27 void test01()
  28 {
  29   using std::make_signed;
  30   using std::is_same;
  31   using std::is_signed;
  32   using std::is_volatile;
  33
  34   // Positive tests.
  35   typedef make_signed<const int>::type          test2_type;
  36   static_assert( is_same<test2_type, const int>::value,
  37                  "make_signed<const int>" );
  38
  39   typedef make_signed<const unsigned int>::type         test21c_type;
  40   static_assert( is_same<test21c_type, const signed int>::value,
  41                  "make_signed<const unsigned int>" );
  42
  43   typedef make_signed<volatile unsigned int>::type      test21v_type;
  44   static_assert( is_same<test21v_type, volatile signed int>::value,
  45                  "make_signed<volatile unsigned int>" );
  46
  47   typedef make_signed<const volatile unsigned int>::type        test21cv_type;
  48   static_assert( is_same<test21cv_type, const volatile signed int>::value,
  49                  "make_signed<const volatile unsigned int>" );
  50
  51   typedef make_signed<const char>::type         test22_type;
  52   static_assert( is_same<test22_type, const signed char>::value,
  53                  "make_signed<const char>" );
  54
  55 #ifdef _GLIBCXX_USE_WCHAR_T
  56   typedef make_signed<volatile wchar_t>::type   test23_type;
  57   static_assert( is_signed<test23_type>::value
  58                  && is_volatile<test23_type>::value
  59                  && sizeof(test23_type) == sizeof(volatile wchar_t),
  60                  "make_signed<volatile wchar_t>" );
  61 #endif
  62
  63   // Chapter 48, chapter 20. Smallest rank such that new signed type same size.
  64   typedef make_signed<test_enum>::type          test24_type;
  65   static_assert( is_signed<test24_type>::value,
  66                  "make_signed<test_enum> makes signed type" );
  67   static_assert( sizeof(test24_type) == sizeof(test_enum),
  68                  "make_signed<test_enum> makes type of same size" );
  69
  70   // GNU Extensions.
  71 #ifdef _GLIBCXX_USE_INT128
  72   typedef make_signed<unsigned __int128>::type  test25_type;
  73   static_assert( is_same<test25_type, __int128>::value,
  74                  "make_signed<unsigned __int128>" );
  75
  76   typedef make_signed<__int128>::type           test26_type;
  77   static_assert( is_same<test26_type, __int128>::value,
  78                  "make_signed<__int128>" );
  79 #endif
  80 }