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// Copyright (C) 2020-2023 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/>.
// { dg-options "-D_GLIBCXX_ASSERTIONS" }
// { dg-do compile { target c++17 } }
#include <string_view>
constexpr wchar_t
test()
{
typedef std::wstring_view string_view_type;
string_view_type s(L"abcd");
return s[4];
}
static_assert(test() == 0); // { dg-error "non-constant condition" }
// { dg-prune-output "in 'constexpr' expansion" }
// { dg-prune-output "unreachable" }
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