4684ddb6aa
- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
50 lines
1.3 KiB
C++
50 lines
1.3 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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// <optional>
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// template <class T>
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// constexpr
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// optional<typename decay<T>::type>
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// make_optional(T&& v);
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#include <experimental/optional>
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#include <string>
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#include <memory>
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#include <cassert>
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int main()
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{
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#if _LIBCPP_STD_VER > 11
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using std::experimental::optional;
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using std::experimental::make_optional;
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{
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optional<int> opt = make_optional(2);
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assert(*opt == 2);
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}
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{
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std::string s("123");
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optional<std::string> opt = make_optional(s);
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assert(*opt == s);
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}
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{
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std::string s("123");
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optional<std::string> opt = make_optional(std::move(s));
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assert(*opt == "123");
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assert(s.empty());
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}
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{
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std::unique_ptr<int> s(new int(3));
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optional<std::unique_ptr<int>> opt = make_optional(std::move(s));
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assert(**opt == 3);
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assert(s == nullptr);
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}
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#endif // _LIBCPP_STD_VER > 11
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}
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