a90c6dd460
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8
92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <tuple>
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// template <class... Types> class tuple;
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// constexpr tuple();
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#include <tuple>
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#include <string>
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#include <cassert>
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#include <type_traits>
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#include "DefaultOnly.h"
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struct NoDefault {
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NoDefault() = delete;
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explicit NoDefault(int) { }
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};
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struct NoExceptDefault {
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NoExceptDefault() noexcept = default;
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};
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struct ThrowingDefault {
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ThrowingDefault() { }
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};
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int main()
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{
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{
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std::tuple<> t;
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}
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{
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std::tuple<int> t;
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assert(std::get<0>(t) == 0);
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}
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{
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std::tuple<int, char*> t;
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assert(std::get<0>(t) == 0);
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assert(std::get<1>(t) == nullptr);
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}
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{
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std::tuple<int, char*, std::string> t;
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assert(std::get<0>(t) == 0);
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assert(std::get<1>(t) == nullptr);
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assert(std::get<2>(t) == "");
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}
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{
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std::tuple<int, char*, std::string, DefaultOnly> t;
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assert(std::get<0>(t) == 0);
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assert(std::get<1>(t) == nullptr);
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assert(std::get<2>(t) == "");
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assert(std::get<3>(t) == DefaultOnly());
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}
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{
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// See bug #21157.
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static_assert(!std::is_default_constructible<std::tuple<NoDefault>>(), "");
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static_assert(!std::is_default_constructible<std::tuple<DefaultOnly, NoDefault>>(), "");
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static_assert(!std::is_default_constructible<std::tuple<NoDefault, DefaultOnly, NoDefault>>(), "");
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}
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{
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static_assert(noexcept(std::tuple<NoExceptDefault>()), "");
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static_assert(noexcept(std::tuple<NoExceptDefault, NoExceptDefault>()), "");
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static_assert(!noexcept(std::tuple<ThrowingDefault, NoExceptDefault>()), "");
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static_assert(!noexcept(std::tuple<NoExceptDefault, ThrowingDefault>()), "");
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static_assert(!noexcept(std::tuple<ThrowingDefault, ThrowingDefault>()), "");
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}
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#ifndef _LIBCPP_HAS_NO_CONSTEXPR
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{
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constexpr std::tuple<> t;
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}
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{
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constexpr std::tuple<int> t;
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assert(std::get<0>(t) == 0);
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}
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{
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constexpr std::tuple<int, char*> t;
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assert(std::get<0>(t) == 0);
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assert(std::get<1>(t) == nullptr);
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}
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#endif
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}
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