libstdc++-v3/testsuite/std/ranges/adaptors/lwg3325_neg.cc

   1 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do compile { target c++20 } }
  19
  20 #include <ranges>
  21
  22 namespace ranges = std::ranges;
  23 namespace views = std::views;
  24
  25 void
  26 test01()
  27 {
  28   auto f = [] (int x) { };
  29   int x[] = {1};
  30   auto v = ranges::transform_view{x, f}; // { dg-error "deduction failed|no match" }
  31 }
  32
  33 // { dg-prune-output "constraint failure" }
  34 // { dg-prune-output "in requirements" }