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

   1 // { dg-do compile { target c++17 } }
   2 // { dg-add-options no_pch }
   3
   4 // Copyright (C) 2016-2024 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 <algorithm>
  22
  23 #ifndef __cpp_lib_clamp
  24 # error "Feature-test macro for clamp missing in <algorithm>"
  25 #elif __cpp_lib_clamp != 201603
  26 # error "Feature-test macro for clamp has wrong value in <algorithm>"
  27 #endif
  28
  29 #include <functional>
  30
  31 static_assert(std::clamp(2, 0, 1) == 1);
  32 static_assert(std::clamp(2, 1, 0, std::greater<int>()) == 1);