//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11
// Make sure that we don't blow up the template instantiation recursion depth
// for tuples of size <= 512.
#include <tuple>
#include <cassert>
#include <utility>
#include "test_macros.h"
template <std::size_t... I>
constexpr void CreateTuple(std::index_sequence<I...>) {
using LargeTuple = std::tuple<std::integral_constant<std::size_t, I>...>;
using TargetTuple = std::tuple<decltype(I)...>;
LargeTuple tuple(std::integral_constant<std::size_t, I>{}...);
assert(std::get<0>(tuple).value == 0);
assert(std::get<sizeof...(I)-1>(tuple).value == sizeof...(I)-1);
TargetTuple t1 = tuple; // converting copy constructor from &
TargetTuple t2 = static_cast<LargeTuple const&>(tuple); // converting copy constructor from const&
TargetTuple t3 = std::move(tuple); // converting rvalue constructor
TargetTuple t4 = static_cast<LargeTuple const&&>(tuple); // converting const rvalue constructor
TargetTuple t5; // default constructor
(void)t1; (void)t2; (void)t3; (void)t4; (void)t5;
#if TEST_STD_VER >= 20
t1 = tuple; // converting assignment from &
t1 = static_cast<LargeTuple const&>(tuple); // converting assignment from const&
t1 = std::move(tuple); // converting assignment from &&
t1 = static_cast<LargeTuple const&&>(tuple); // converting assignment from const&&
swap(t1, t2); // swap
#endif
// t1 == tuple; // comparison does not work yet (we blow the constexpr stack)
}
constexpr bool test() {
CreateTuple(std::make_index_sequence<512>{});
return true;
}
int main(int, char**) {
test();
static_assert(test(), "");
return 0;
}