| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <tuple> |
| |
| // template <class... Types> class tuple; |
| |
| // template <class Alloc, class... UTypes> |
| // tuple(allocator_arg_t, const Alloc& a, UTypes&&...); |
| |
| #include <tuple> |
| #include <cassert> |
| |
| #include "../MoveOnly.h" |
| #include "allocators.h" |
| #include "../alloc_first.h" |
| #include "../alloc_last.h" |
| |
| struct NoDefault { NoDefault() = delete; }; |
| |
| // Make sure the _Up... constructor SFINAEs out when the types that |
| // are not explicitly initialized are not all default constructible. |
| // Otherwise, std::is_constructible would return true but instantiating |
| // the constructor would fail. |
| void test_default_constructible_extension_sfinae() |
| { |
| { |
| typedef std::tuple<MoveOnly, NoDefault> Tuple; |
| |
| static_assert(!std::is_constructible< |
| Tuple, |
| std::allocator_arg_t, A1<int>, MoveOnly |
| >::value, ""); |
| |
| static_assert(std::is_constructible< |
| Tuple, |
| std::allocator_arg_t, A1<int>, MoveOnly, NoDefault |
| >::value, ""); |
| } |
| { |
| typedef std::tuple<MoveOnly, MoveOnly, NoDefault> Tuple; |
| |
| static_assert(!std::is_constructible< |
| std::tuple<MoveOnly, MoveOnly, NoDefault>, |
| std::allocator_arg_t, A1<int>, MoveOnly, MoveOnly |
| >::value, ""); |
| |
| static_assert(std::is_constructible< |
| std::tuple<MoveOnly, MoveOnly, NoDefault>, |
| std::allocator_arg_t, A1<int>, MoveOnly, MoveOnly, NoDefault |
| >::value, ""); |
| } |
| { |
| // Same idea as above but with a nested tuple |
| typedef std::tuple<MoveOnly, NoDefault> Tuple; |
| typedef std::tuple<MoveOnly, Tuple, MoveOnly, MoveOnly> NestedTuple; |
| |
| static_assert(!std::is_constructible< |
| NestedTuple, |
| std::allocator_arg_t, A1<int>, MoveOnly, MoveOnly, MoveOnly, MoveOnly |
| >::value, ""); |
| |
| static_assert(std::is_constructible< |
| NestedTuple, |
| std::allocator_arg_t, A1<int>, MoveOnly, Tuple, MoveOnly, MoveOnly |
| >::value, ""); |
| } |
| { |
| typedef std::tuple<MoveOnly, int> Tuple; |
| typedef std::tuple<MoveOnly, Tuple, MoveOnly, MoveOnly> NestedTuple; |
| |
| static_assert(std::is_constructible< |
| NestedTuple, |
| std::allocator_arg_t, A1<int>, MoveOnly, MoveOnly, MoveOnly, MoveOnly |
| >::value, ""); |
| |
| static_assert(std::is_constructible< |
| NestedTuple, |
| std::allocator_arg_t, A1<int>, MoveOnly, Tuple, MoveOnly, MoveOnly |
| >::value, ""); |
| } |
| } |
| |
| int main() |
| { |
| { |
| std::tuple<MoveOnly> t(std::allocator_arg, A1<int>(), MoveOnly(0)); |
| assert(std::get<0>(t) == 0); |
| } |
| { |
| std::tuple<MoveOnly, MoveOnly> t(std::allocator_arg, A1<int>(), |
| MoveOnly(0), MoveOnly(1)); |
| assert(std::get<0>(t) == 0); |
| assert(std::get<1>(t) == 1); |
| } |
| { |
| std::tuple<MoveOnly, MoveOnly, MoveOnly> t(std::allocator_arg, A1<int>(), |
| MoveOnly(0), |
| 1, 2); |
| assert(std::get<0>(t) == 0); |
| assert(std::get<1>(t) == 1); |
| assert(std::get<2>(t) == 2); |
| } |
| { |
| alloc_first::allocator_constructed = false; |
| alloc_last::allocator_constructed = false; |
| std::tuple<int, alloc_first, alloc_last> t(std::allocator_arg, |
| A1<int>(5), 1, 2, 3); |
| assert(std::get<0>(t) == 1); |
| assert(alloc_first::allocator_constructed); |
| assert(std::get<1>(t) == alloc_first(2)); |
| assert(alloc_last::allocator_constructed); |
| assert(std::get<2>(t) == alloc_last(3)); |
| } |
| // extensions |
| { |
| std::tuple<MoveOnly, MoveOnly, MoveOnly> t(std::allocator_arg, A1<int>(), |
| 0, 1); |
| assert(std::get<0>(t) == 0); |
| assert(std::get<1>(t) == 1); |
| assert(std::get<2>(t) == MoveOnly()); |
| } |
| { |
| std::tuple<MoveOnly, MoveOnly, MoveOnly> t(std::allocator_arg, A1<int>(), |
| 0); |
| assert(std::get<0>(t) == 0); |
| assert(std::get<1>(t) == MoveOnly()); |
| assert(std::get<2>(t) == MoveOnly()); |
| } |
| // Check that SFINAE is properly applied with the default reduced arity |
| // constructor extensions. |
| test_default_constructible_extension_sfinae(); |
| } |