libstdc++-v3/testsuite/25_algorithms/clamp/constexpr.cc

   1 // { dg-do compile { target c++17 } }
   2
   3 // Copyright (C) 2016-2023 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <algorithm>
  21 #include <functional>
  22
  23 #ifndef __cpp_lib_clamp
  24 # error "Feature-test macro for clamp missing"
  25 #elif __cpp_lib_clamp != 201603
  26 # error "Feature-test macro for clamp has wrong value"
  27 #endif
  28
  29 static_assert(std::clamp(2, 0, 1) == 1);
  30 static_assert(std::clamp(2, 1, 0, std::greater<int>()) == 1);