libstdc++-v3/testsuite/experimental/functional/87538.cc

   1 // Copyright (C) 2018-2023 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 run { target c++14 } }
  19
  20 #include <experimental/functional>
  21 #include <testsuite_hooks.h>
  22
  23 struct N {
  24   int operator()(int i) { if (i == 0) throw -1; return i; }
  25 };
  26
  27 void
  28 test01()
  29 {
  30   N n;
  31   auto not_n = std::experimental::not_fn(n);
  32   static_assert( !noexcept(not_n(1)), "can throw" );
  33   VERIFY(not_n(1) == 0);
  34   int exception = 0;
  35   try {
  36     not_n(0);
  37   }
  38   catch (int e) {
  39     exception = e;
  40   }
  41   VERIFY(exception == -1);
  42 }
  43
  44 int
  45 main()
  46 {
  47   test01();
  48 }