| // 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/>. |
| |
| // { dg-do compile } |
| |
| // NB: Don't include any other headers in this file. |
| // LWG 2735. std::abs(short), std::abs(signed char) and others should return |
| // int instead of double in order to be compatible with C++98 and C |
| #include <cstdlib> |
| |
| template<typename> struct is_int { }; |
| template<> struct is_int<int> { typedef int type; }; |
| |
| template<typename T> |
| typename is_int<T>::type |
| do_check(T t) |
| { |
| return T(0); |
| } |
| |
| template<typename T> |
| void check() |
| { |
| do_check(std::abs(T(0))); |
| } |
| |
| void test() |
| { |
| check<short>(); |
| check<unsigned short>(); |
| check<char>(); |
| check<signed char>(); |
| check<unsigned char>(); |
| } |