You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// UNSUPPORTED: c++98, c++03, c++11, c++14
|
|
// XFAIL: dylib-has-no-bad_optional_access && !libcpp-no-exceptions
|
|
|
|
// <optional>
|
|
//
|
|
// template <class T>
|
|
// constexpr optional<decay_t<T>> make_optional(T&& v);
|
|
|
|
#include <optional>
|
|
#include <string>
|
|
#include <memory>
|
|
#include <cassert>
|
|
|
|
#include "test_macros.h"
|
|
|
|
int main(int, char**)
|
|
{
|
|
using std::optional;
|
|
using std::make_optional;
|
|
{
|
|
int arr[10]; ((void)arr);
|
|
ASSERT_SAME_TYPE(decltype(make_optional(arr)), optional<int*>);
|
|
}
|
|
{
|
|
constexpr auto opt = make_optional(2);
|
|
ASSERT_SAME_TYPE(decltype(opt), const optional<int>);
|
|
static_assert(opt.value() == 2);
|
|
}
|
|
{
|
|
optional<int> opt = make_optional(2);
|
|
assert(*opt == 2);
|
|
}
|
|
{
|
|
std::string s("123");
|
|
optional<std::string> opt = make_optional(s);
|
|
assert(*opt == s);
|
|
}
|
|
{
|
|
std::unique_ptr<int> s(new int(3));
|
|
optional<std::unique_ptr<int>> opt = make_optional(std::move(s));
|
|
assert(**opt == 3);
|
|
assert(s == nullptr);
|
|
}
|
|
|
|
return 0;
|
|
}
|