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7adcbafe | 1 | // Copyright (C) 2016-2022 Free Software Foundation, Inc. |
37b204de JW |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
18 | // { dg-do compile { target c++11 } } | |
7cc9022f AA |
19 | // Math-related cstdlib bits are not freestanding. |
20 | // { dg-require-effective-target hosted } | |
37b204de JW |
21 | |
22 | // NB: Don't include any other headers in this file. | |
23 | // LWG 2192 requires <cstdlib> to declare overloads for floating point types. | |
24 | #include <cstdlib> | |
25 | ||
26 | template<typename, typename> struct is_same { enum { value = 0 }; }; | |
27 | template<typename T> struct is_same<T, T> { enum { value = 1 }; }; | |
28 | ||
29 | template<typename T> | |
30 | constexpr bool check(T val) { | |
31 | return is_same<decltype(std::abs(val)), T>::value; | |
32 | } | |
33 | ||
34 | static_assert( check(1.f), "abs(1.f) returns float" ); | |
35 | static_assert( check(1.), "abs(1.) returns double" ); | |
36 | static_assert( check(1.l), "abs(1.l) returns long double" ); |