libstdc++-v3/testsuite/20_util/is_signed/value.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // 2005-01-24  Paolo Carlini  <pcarlini@suse.de>
   4 //
   5 // Copyright (C) 2005-2021 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 #include <type_traits>
  23 #include <testsuite_tr1.h>
  24
  25 void test01()
  26 {
  27   using std::is_signed;
  28   using namespace __gnu_test;
  29
  30   static_assert(test_category<is_signed, void>(false), "");
  31
  32   static_assert(test_category<is_signed, char>(char(-1) < char(0)), "");
  33   static_assert(test_category<is_signed, signed char>(true), "");
  34   static_assert(test_category<is_signed, unsigned char>(false), "");
  35 #ifdef _GLIBCXX_USE_WCHAR_T
  36   static_assert(test_category<is_signed, wchar_t>
  37                 (wchar_t(-1) < wchar_t(0)), "");
  38 #endif
  39   static_assert(test_category<is_signed, short>(true), "");
  40   static_assert(test_category<is_signed, unsigned short>(false), "");
  41   static_assert(test_category<is_signed, int>(true), "");
  42   static_assert(test_category<is_signed, unsigned int>(false), "");
  43   static_assert(test_category<is_signed, long>(true), "");
  44   static_assert(test_category<is_signed, unsigned long>(false), "");
  45   static_assert(test_category<is_signed, long long>(true), "");
  46   static_assert(test_category<is_signed, unsigned long long>(false), "");
  47
  48   static_assert(test_category<is_signed, float>(true), "");
  49   static_assert(test_category<is_signed, double>(true), "");
  50   static_assert(test_category<is_signed, long double>(true), "");
  51
  52 #ifndef __STRICT_ANSI__
  53   // GNU Extensions.
  54 #ifdef _GLIBCXX_USE_INT128
  55   static_assert(test_category<is_signed, __int128>(true), "");
  56   static_assert(test_category<is_signed, unsigned __int128>(false), "");
  57 #endif
  58
  59 #ifdef _GLIBCXX_USE_FLOAT128
  60   static_assert(test_category<is_signed, __float128>(true), "");
  61 #endif
  62 #endif
  63
  64   // Sanity check.
  65   static_assert(test_category<is_signed, ClassType>(false), "");
  66 }