| // Copyright (C) 2007-2021 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> |
| #include <locale> |
| #include <testsuite_hooks.h> |
| |
| // Based on Langer Kreft "Standard C++ IOStreams and Locales" p 316-318 |
| struct base_facet: public std::locale::facet |
| { |
| virtual std::string msg() const |
| { return "base class"; } |
| |
| static std::locale::id id; |
| }; |
| |
| std::locale::id base_facet::id; |
| |
| |
| struct derived_facet: public base_facet |
| { |
| virtual std::string msg() const |
| { return "derived class"; } |
| |
| virtual std::string msg_repeater() const |
| { return "derived class derived class"; } |
| |
| }; |
| |
| // PR libstdc++/30127 |
| // PR libstdc++/34449 |
| int main() |
| { |
| using std::locale; |
| using std::has_facet; |
| using std::use_facet; |
| |
| locale loc_c = locale::classic(); |
| locale loc_base(loc_c, new base_facet); |
| locale loc_derived(loc_c, new derived_facet); |
| |
| // Standard facets. |
| VERIFY( has_facet<std::ctype<char> >(loc_c) ); |
| VERIFY( has_facet<std::ctype<char> >(loc_base) ); |
| VERIFY( has_facet<std::ctype<char> >(loc_derived) ); |
| |
| // User defined base facet. |
| VERIFY( !has_facet<base_facet>(loc_c) ); |
| VERIFY( has_facet<base_facet>(loc_base) ); |
| VERIFY( has_facet<base_facet>(loc_derived) ); |
| |
| // User defined derived facet. |
| VERIFY( !has_facet<derived_facet>(loc_c) ); |
| VERIFY( !has_facet<derived_facet>(loc_base) ); |
| VERIFY( has_facet<derived_facet>(loc_derived) ); |
| |
| |
| // 1 |
| try |
| { |
| if (has_facet<derived_facet>(loc_base)) |
| { |
| use_facet<derived_facet>(loc_base).msg_repeater(); |
| VERIFY( false ); |
| } |
| } |
| catch (...) |
| { |
| // Expect no exception. |
| VERIFY( true ); |
| } |
| |
| // 2 |
| try |
| { |
| if (has_facet<base_facet>(loc_derived)) |
| use_facet<base_facet>(loc_derived).msg(); |
| else |
| VERIFY( true ); |
| } |
| catch (...) |
| { |
| // Expect no exception. |
| VERIFY( true ); |
| } |
| |
| return 0; |
| } |