projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| a945c346 | 1 | // Copyright (C) 2015-2024 Free Software Foundation, Inc. |
| 606dda21 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 | ||
| 7b936140 | 18 | // { dg-do compile { target c++17 } } |
| f4ab6846 | 19 | // { dg-add-options no_pch } |
| 606dda21 JW |
20 | |
| 21 | #include <numeric> | |
| 22 | ||
| c6888c62 | 23 | #ifndef __cpp_lib_gcd_lcm |
| 606dda21 | 24 | # error "Feature-test macro for gcd missing" |
| c6888c62 | 25 | #elif __cpp_lib_gcd_lcm != 201606 |
| 606dda21 JW |
26 | # error "Feature-test macro for gcd has wrong value" |
| 27 | #endif | |
| 28 | ||
| 29 | using std::gcd; | |
| 3c219134 | 30 | using std::is_same_v; |
| 606dda21 JW |
31 | |
| 32 | static_assert( gcd(1071, 462) == 21, "" ); | |
| 33 | static_assert( gcd(2000, 20) == 20, "" ); | |
| 34 | static_assert( gcd(2011, 17) == 1, "GCD of two primes is 1" ); | |
| 35 | static_assert( gcd(200, 200) == 200, "GCD of equal numbers is that number" ); | |
| 36 | static_assert( gcd(0, 13) == 13, "GCD of any number and 0 is that number" ); | |
| 37 | static_assert( gcd(29, 0) == 29, "GCD of any number and 0 is that number" ); | |
| 3c219134 | 38 | static_assert( gcd(0, 0) == 0, "Zarro Boogs found" ); |
| 606dda21 JW |
39 | |
| 40 | static_assert(gcd(1u, 2) == 1, "unsigned and signed"); | |
| 3c219134 | 41 | static_assert(gcd(9, 6u) == 3, "unsigned and signed"); |
| 606dda21 | 42 | static_assert(gcd(3, 4u) == 1, "signed and unsigned"); |
| 3c219134 JW |
43 | static_assert(gcd(32u, 24) == 8, "signed and unsigned"); |
| 44 | static_assert(gcd(1u, -2) == 1, "unsigned and negative"); | |
| 45 | static_assert(gcd(-21, 28u) == 7, "unsigned and negative"); | |
| 46 | static_assert(gcd(-3, 4u) == 1, "negative and unsigned"); | |
| 47 | static_assert(gcd(33u, -44) == 11, "negative and unsigned"); | |
| 606dda21 | 48 | static_assert(gcd(5u, 6u) == 1, "unsigned and unsigned"); |
| 3c219134 JW |
49 | static_assert(gcd(54u, 36u) == 18, "unsigned and unsigned"); |
| 50 | static_assert(gcd(-5, -6) == 1, "negative and negative"); | |
| 51 | static_assert(gcd(-50, -60) == 10, "negative and negative"); | |
| 606dda21 | 52 | |
| 3c219134 JW |
53 | static_assert( is_same_v<decltype(gcd(1l, 1)), long> ); |
| 54 | static_assert( is_same_v<decltype(gcd(1ul, 1ull)), unsigned long long> ); |