mirror of
https://github.com/llvm-mirror/libcxx.git
synced 2025-10-23 18:38:30 +08:00
a3eac518e6
Quite a few libcxx tests seem to follow the format: #if _LIBCPP_STD_VER > X // Do test. #else // Empty test. #endif We should instead use the UNSUPPORTED lit directive to exclude the test on earlier C++ standards. This gives us a more accurate number of test passes for those standards and avoids unnecessary conflicts with other lit directives on the same tests. Reviewers: bcraig, ericwf, mclow.lists Differential revision: http://reviews.llvm.org/D20730 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@271108 91177308-0d34-0410-b5e6-96231b3b80d8
64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// UNSUPPORTED: c++98, c++03, c++11
|
|
// <optional>
|
|
|
|
// constexpr optional(nullopt_t) noexcept;
|
|
|
|
#include <experimental/optional>
|
|
#include <type_traits>
|
|
#include <cassert>
|
|
|
|
using std::experimental::optional;
|
|
using std::experimental::nullopt_t;
|
|
using std::experimental::nullopt;
|
|
|
|
template <class Opt>
|
|
void
|
|
test_constexpr()
|
|
{
|
|
static_assert(noexcept(Opt(nullopt)), "");
|
|
constexpr Opt opt(nullopt);
|
|
static_assert(static_cast<bool>(opt) == false, "");
|
|
|
|
struct test_constexpr_ctor
|
|
: public Opt
|
|
{
|
|
constexpr test_constexpr_ctor() {}
|
|
};
|
|
}
|
|
|
|
template <class Opt>
|
|
void
|
|
test()
|
|
{
|
|
static_assert(noexcept(Opt(nullopt)), "");
|
|
Opt opt(nullopt);
|
|
assert(static_cast<bool>(opt) == false);
|
|
|
|
struct test_constexpr_ctor
|
|
: public Opt
|
|
{
|
|
constexpr test_constexpr_ctor() {}
|
|
};
|
|
}
|
|
|
|
struct X
|
|
{
|
|
X();
|
|
};
|
|
|
|
int main()
|
|
{
|
|
test_constexpr<optional<int>>();
|
|
test_constexpr<optional<int*>>();
|
|
test<optional<X>>();
|
|
}
|