| // { dg-do compile { target c++11 } } |
| |
| // Copyright (C) 2012-2021 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 <type_traits> |
| #include <array> |
| #include <utility> |
| |
| template<typename... Args> |
| constexpr |
| std::array<typename std::common_type<Args...>::type, |
| sizeof...(Args)> |
| make_array(Args&&... args) // { dg-error "no type.*common_type<>" } |
| { |
| typedef typename std::common_type<Args...>::type CT; |
| return std::array<CT, sizeof...(Args)>{static_cast<CT> |
| (std::forward<Args>(args))...}; |
| } |
| |
| void test01() |
| { |
| constexpr auto a1 = make_array(0); |
| constexpr auto a2 = make_array(0, 1.2); |
| constexpr auto a3 = make_array(5, true, 3.1415f, 'c'); |
| |
| int i{}; |
| double d{1.2}; |
| float f{3.1415f}; |
| |
| auto b1 = make_array(i); |
| auto b2 = make_array(i, 1.2); |
| auto b3 = make_array(i, d); |
| auto b4 = make_array(0, d); |
| auto b5 = make_array(i, true, f, 'c'); |
| |
| static_assert(std::is_same<decltype(a1), const std::array<int, 1>>(), ""); |
| static_assert(std::is_same<decltype(a2), const std::array<double, 2>>(), ""); |
| static_assert(std::is_same<decltype(a3), const std::array<float, 4>>(), ""); |
| |
| static_assert(std::is_same<decltype(b1), std::array<int, 1>>(), ""); |
| static_assert(std::is_same<decltype(b2), std::array<double, 2>>(), ""); |
| static_assert(std::is_same<decltype(b3), std::array<double, 2>>(), ""); |
| static_assert(std::is_same<decltype(b4), std::array<double, 2>>(), ""); |
| static_assert(std::is_same<decltype(b5), std::array<float, 4>>(), ""); |
| } |
| |
| void test02() |
| { |
| make_array(); // { dg-error "no matching function" } |
| } |
| // { dg-prune-output "substitution" } |
| // { dg-prune-output "include" } |