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//===----------------------------------------------------------------------===//
//
// 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;
// constexpr tuple();
#include <tuple>
#include <string>
#include <cassert>
#include <type_traits>
#include "DefaultOnly.h"
struct NoDefault {
NoDefault() = delete;
explicit NoDefault(int) { }
};
struct NoExceptDefault {
NoExceptDefault() noexcept = default;
};
struct ThrowingDefault {
ThrowingDefault() { }
};
int main()
{
{
std::tuple<> t;
}
{
std::tuple<int> t;
assert(std::get<0>(t) == 0);
}
{
std::tuple<int, char*> t;
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == nullptr);
}
{
std::tuple<int, char*, std::string> t;
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == nullptr);
assert(std::get<2>(t) == "");
}
{
std::tuple<int, char*, std::string, DefaultOnly> t;
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == nullptr);
assert(std::get<2>(t) == "");
assert(std::get<3>(t) == DefaultOnly());
}
{
// See bug #21157.
static_assert(!std::is_default_constructible<std::tuple<NoDefault>>(), "");
static_assert(!std::is_default_constructible<std::tuple<DefaultOnly, NoDefault>>(), "");
static_assert(!std::is_default_constructible<std::tuple<NoDefault, DefaultOnly, NoDefault>>(), "");
}
{
static_assert(noexcept(std::tuple<NoExceptDefault>()), "");
static_assert(noexcept(std::tuple<NoExceptDefault, NoExceptDefault>()), "");
static_assert(!noexcept(std::tuple<ThrowingDefault, NoExceptDefault>()), "");
static_assert(!noexcept(std::tuple<NoExceptDefault, ThrowingDefault>()), "");
static_assert(!noexcept(std::tuple<ThrowingDefault, ThrowingDefault>()), "");
}
#ifndef _LIBCPP_HAS_NO_CONSTEXPR
{
constexpr std::tuple<> t;
}
{
constexpr std::tuple<int> t;
assert(std::get<0>(t) == 0);
}
{
constexpr std::tuple<int, char*> t;
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == nullptr);
}
#endif
}
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