//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <tuple>
// template <class... Types> class tuple;
// template <class... Tuples> tuple<CTypes...> tuple_cat(Tuples&&... tpls);
// UNSUPPORTED: c++03
#include <tuple>
#include <utility>
#include <array>
#include <string>
#include <cassert>
#include "test_macros.h"
#include "MoveOnly.h"
namespace NS {
struct Namespaced {
int i;
};
template<typename ...Ts>
void forward_as_tuple(Ts...) = delete;
}
int main(int, char**)
{
{
std::tuple<> t = std::tuple_cat();
((void)t); // Prevent unused warning
}
{
std::tuple<> t1;
std::tuple<> t2 = std::tuple_cat(t1);
((void)t2); // Prevent unused warning
}
{
std::tuple<> t = std::tuple_cat(std::tuple<>());
((void)t); // Prevent unused warning
}
{
std::tuple<> t = std::tuple_cat(std::array<int, 0>());
((void)t); // Prevent unused warning
}
{
std::tuple<int> t1(1);
std::tuple<int> t = std::tuple_cat(t1);
assert(std::get<0>(t) == 1);
}
#if TEST_STD_VER > 11
{
constexpr std::tuple<> t = std::tuple_cat();
((void)t); // Prevent unused warning
}
{
constexpr std::tuple<> t1;
constexpr std::tuple<> t2 = std::tuple_cat(t1);
((void)t2); // Prevent unused warning
}
{
constexpr std::tuple<> t = std::tuple_cat(std::tuple<>());
((void)t); // Prevent unused warning
}
{
constexpr std::tuple<> t = std::tuple_cat(std::array<int, 0>());
((void)t); // Prevent unused warning
}
{
constexpr std::tuple<int> t1(1);
constexpr std::tuple<int> t = std::tuple_cat(t1);
static_assert(std::get<0>(t) == 1, "");
}
{
constexpr std::tuple<int> t1(1);
constexpr std::tuple<int, int> t = std::tuple_cat(t1, t1);
static_assert(std::get<0>(t) == 1, "");
static_assert(std::get<1>(t) == 1, "");
}
#endif
{
std::tuple<int, MoveOnly> t =
std::tuple_cat(std::tuple<int, MoveOnly>(1, 2));
assert(std::get<0>(t) == 1);
assert(std::get<1>(t) == 2);
}
{
std::tuple<int, int, int> t = std::tuple_cat(std::array<int, 3>());
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == 0);
assert(std::get<2>(t) == 0);
}
{
std::tuple<int, MoveOnly> t = std::tuple_cat(std::pair<int, MoveOnly>(2, 1));
assert(std::get<0>(t) == 2);
assert(std::get<1>(t) == 1);
}
{
std::tuple<> t1;
std::tuple<> t2;
std::tuple<> t3 = std::tuple_cat(t1, t2);
((void)t3); // Prevent unused warning
}
{
std::tuple<> t1;
std::tuple<int> t2(2);
std::tuple<int> t3 = std::tuple_cat(t1, t2);
assert(std::get<0>(t3) == 2);
}
{
std::tuple<> t1;
std::tuple<int> t2(2);
std::tuple<int> t3 = std::tuple_cat(t2, t1);
assert(std::get<0>(t3) == 2);
}
{
std::tuple<int*> t1;
std::tuple<int> t2(2);
std::tuple<int*, int> t3 = std::tuple_cat(t1, t2);
assert(std::get<0>(t3) == nullptr);
assert(std::get<1>(t3) == 2);
}
{
std::tuple<int*> t1;
std::tuple<int> t2(2);
std::tuple<int, int*> t3 = std::tuple_cat(t2, t1);
assert(std::get<0>(t3) == 2);
assert(std::get<1>(t3) == nullptr);
}
{
std::tuple<int*> t1;
std::tuple<int, double> t2(2, 3.5);
std::tuple<int*, int, double> t3 = std::tuple_cat(t1, t2);
assert(std::get<0>(t3) == nullptr);
assert(std::get<1>(t3) == 2);
assert(std::get<2>(t3) == 3.5);
}
{
std::tuple<int*> t1;
std::tuple<int, double> t2(2, 3.5);
std::tuple<int, double, int*> t3 = std::tuple_cat(t2, t1);
assert(std::get<0>(t3) == 2);
assert(std::get<1>(t3) == 3.5);
assert(std::get<2>(t3) == nullptr);
}
{
std::tuple<int*, MoveOnly> t1(nullptr, 1);
std::tuple<int, double> t2(2, 3.5);
std::tuple<int*, MoveOnly, int, double> t3 =
std::tuple_cat(std::move(t1), t2);
assert(std::get<0>(t3) == nullptr);
assert(std::get<1>(t3) == 1);
assert(std::get<2>(t3) == 2);
assert(std::get<3>(t3) == 3.5);
}
{
std::tuple<int*, MoveOnly> t1(nullptr, 1);
std::tuple<int, double> t2(2, 3.5);
std::tuple<int, double, int*, MoveOnly> t3 =
std::tuple_cat(t2, std::move(t1));
assert(std::get<0>(t3) == 2);
assert(std::get<1>(t3) == 3.5);
assert(std::get<2>(t3) == nullptr);
assert(std::get<3>(t3) == 1);
}
{
std::tuple<MoveOnly, MoveOnly> t1(1, 2);
std::tuple<int*, MoveOnly> t2(nullptr, 4);
std::tuple<MoveOnly, MoveOnly, int*, MoveOnly> t3 =
std::tuple_cat(std::move(t1), std::move(t2));
assert(std::get<0>(t3) == 1);
assert(std::get<1>(t3) == 2);
assert(std::get<2>(t3) == nullptr);
assert(std::get<3>(t3) == 4);
}
{
std::tuple<MoveOnly, MoveOnly> t1(1, 2);
std::tuple<int*, MoveOnly> t2(nullptr, 4);
std::tuple<MoveOnly, MoveOnly, int*, MoveOnly> t3 =
std::tuple_cat(std::tuple<>(),
std::move(t1),
std::move(t2));
assert(std::get<0>(t3) == 1);
assert(std::get<1>(t3) == 2);
assert(std::get<2>(t3) == nullptr);
assert(std::get<3>(t3) == 4);
}
{
std::tuple<MoveOnly, MoveOnly> t1(1, 2);
std::tuple<int*, MoveOnly> t2(nullptr, 4);
std::tuple<MoveOnly, MoveOnly, int*, MoveOnly> t3 =
std::tuple_cat(std::move(t1),
std::tuple<>(),
std::move(t2));
assert(std::get<0>(t3) == 1);
assert(std::get<1>(t3) == 2);
assert(std::get<2>(t3) == nullptr);
assert(std::get<3>(t3) == 4);
}
{
std::tuple<MoveOnly, MoveOnly> t1(1, 2);
std::tuple<int*, MoveOnly> t2(nullptr, 4);
std::tuple<MoveOnly, MoveOnly, int*, MoveOnly> t3 =
std::tuple_cat(std::move(t1),
std::move(t2),
std::tuple<>());
assert(std::get<0>(t3) == 1);
assert(std::get<1>(t3) == 2);
assert(std::get<2>(t3) == nullptr);
assert(std::get<3>(t3) == 4);
}
{
std::tuple<MoveOnly, MoveOnly> t1(1, 2);
std::tuple<int*, MoveOnly> t2(nullptr, 4);
std::tuple<MoveOnly, MoveOnly, int*, MoveOnly, int> t3 =
std::tuple_cat(std::move(t1),
std::move(t2),
std::tuple<int>(5));
assert(std::get<0>(t3) == 1);
assert(std::get<1>(t3) == 2);
assert(std::get<2>(t3) == nullptr);
assert(std::get<3>(t3) == 4);
assert(std::get<4>(t3) == 5);
}
{
// See bug #19616.
auto t1 = std::tuple_cat(
std::make_tuple(std::make_tuple(1)),
std::make_tuple()
);
assert(t1 == std::make_tuple(std::make_tuple(1)));
auto t2 = std::tuple_cat(
std::make_tuple(std::make_tuple(1)),
std::make_tuple(std::make_tuple(2))
);
assert(t2 == std::make_tuple(std::make_tuple(1), std::make_tuple(2)));
}
{
int x = 101;
std::tuple<int, const int, int&, const int&, int&&> t(42, 101, x, x, std::move(x));
const auto& ct = t;
std::tuple<int, const int, int&, const int&> t2(42, 101, x, x);
const auto& ct2 = t2;
auto r = std::tuple_cat(std::move(t), std::move(ct), t2, ct2);
ASSERT_SAME_TYPE(decltype(r), std::tuple<
int, const int, int&, const int&, int&&,
int, const int, int&, const int&, int&&,
int, const int, int&, const int&,
int, const int, int&, const int&>);
((void)r);
}
{
std::tuple<NS::Namespaced> t1(NS::Namespaced{1});
std::tuple<NS::Namespaced> t = std::tuple_cat(t1);
std::tuple<NS::Namespaced, NS::Namespaced> t2 =
std::tuple_cat(t1, t1);
assert(std::get<0>(t).i == 1);
assert(std::get<0>(t2).i == 1);
}
return 0;
}
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