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Fixes PR21157 'tuple: non-default constructible tuple hard failure' Thanks to Louis Dionne for the bug report and the patch.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@219785 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2014-10-15 10:33:02 +00:00
parent df9722ecf1
commit bbc7c74fbb
4 changed files with 87 additions and 11 deletions
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28
test/utilities/tuple/tuple.tuple/tuple.cnstr/default.pass.cpp
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@@ -16,9 +16,23 @@
#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()
{
{
@@ -46,6 +60,20 @@ int main()
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;