libstdc++-v3/testsuite/26_numerics/random/independent_bits_engine/requirements/constexpr_functions.cc

   1 // { dg-do compile { target c++11 } }
   2 // { dg-require-cstdint "" }
   3
   4 // Copyright (C) 2010-2018 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 3, 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 COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <random>
  22 #include <testsuite_common_types.h>
  23
  24 namespace __gnu_test
  25 {
  26   struct constexpr_member_functions
  27   {
  28     template<typename _Ttesttype>
  29       void
  30       operator()()
  31       {
  32         struct _Concept
  33         {
  34           void __constraint()
  35           {
  36             constexpr auto v1 __attribute__((unused))
  37               = _Ttesttype::min();
  38             constexpr auto v2 __attribute__((unused))
  39               = _Ttesttype::max();
  40           }
  41         };
  42
  43         _Concept c;
  44         c.__constraint();
  45       }
  46   };
  47 }
  48
  49 int main()
  50 {
  51   __gnu_test::constexpr_member_functions test;
  52   typedef std::independent_bits_engine
  53     <
  54       std::subtract_with_carry_engine
  55         <
  56           uint_fast64_t, 48, 5, 12
  57         >,
  58       48, uint_fast64_t
  59     > type;
  60   test.operator()<type>();
  61   return 0;
  62 }