mirror of
https://github.com/llvm-mirror/libcxx.git
synced 2025-10-24 03:32:35 +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
55 lines
1.2 KiB
C++
55 lines
1.2 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
|
|
// XFAIL: libcpp-no-exceptions
|
|
// <optional>
|
|
|
|
// constexpr const T& optional<T>::value() const;
|
|
|
|
#include <experimental/optional>
|
|
#include <type_traits>
|
|
#include <cassert>
|
|
|
|
using std::experimental::optional;
|
|
using std::experimental::in_place_t;
|
|
using std::experimental::in_place;
|
|
using std::experimental::bad_optional_access;
|
|
|
|
struct X
|
|
{
|
|
X() = default;
|
|
X(const X&) = delete;
|
|
constexpr int test() const {return 3;}
|
|
int test() {return 4;}
|
|
};
|
|
|
|
int main()
|
|
{
|
|
{
|
|
constexpr optional<X> opt(in_place);
|
|
static_assert(opt.value().test() == 3, "");
|
|
}
|
|
{
|
|
const optional<X> opt(in_place);
|
|
assert(opt.value().test() == 3);
|
|
}
|
|
{
|
|
const optional<X> opt;
|
|
try
|
|
{
|
|
opt.value();
|
|
assert(false);
|
|
}
|
|
catch (const bad_optional_access&)
|
|
{
|
|
}
|
|
}
|
|
}
|