Implement LWG 2857, {variant,optional,any}::emplace should return the constructed...

[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 20_util / any / misc / any_cast_neg.cc

// { dg-options "-std=gnu++17" }
// { dg-do compile }

// Copyright (C) 2014-2017 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

#include <any>

void test01()
{
  using std::any;
  using std::any_cast;

  const any y(1);
  any_cast<int&>(y); // { dg-error "invalid static_cast" "" { target { *-*-* } } 461 }
}