| // Copyright (C) 2016-2021 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/>. |
| |
| // { dg-do compile { target c++11 } } |
| |
| #include <cmath> |
| // Also make names from <cmath> available in the global namespace: |
| #include <math.h> |
| |
| bool foo(double d) |
| { |
| return ::isfinite(d); // PR libstdc++/14608 |
| } |
| |
| int bar(double d) |
| { |
| return ::signbit(d); // PR libstdc++/44611 |
| } |
| |
| constexpr bool is_double(double) { return true; } |
| template<typename T> constexpr bool is_double(T) { return false; } |
| using type = decltype(::abs(1.5)); |
| static_assert(is_double(type{}), "::abs(double) overload exists in <math.h>"); |
