| // { dg-options "-std=gnu++2a" } |
| // { dg-do compile { target c++2a } } |
| // |
| // Copyright (C) 2019-2021 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 <string_view> |
| #include <array> |
| |
| constexpr char |
| test() |
| { |
| constexpr std::string_view hw("Hello, World!"); |
| static_assert('H' == *hw.begin()); |
| auto ch = hw[4]; |
| static_assert('W' == *(hw.cbegin() + 7)); |
| |
| std::array<int, hw.size()> a2{{0,0,0,0,0,0,0,0,0,0,0,0,0}}; |
| auto hwi = hw.begin(); |
| auto hwe = hw.end(); |
| auto a2i = a2.begin(); |
| while (hwi != hwe) |
| *a2i++ = *hwi++; |
| |
| return *(hw.cbegin() + 3); |
| } |
| |
| void |
| run_test() |
| { |
| constexpr char ch = test(); |
| } |
