forked from OSchip/llvm-project
63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// <optional>
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// void reset() noexcept;
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#include <optional>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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using std::optional;
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struct X
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{
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static bool dtor_called;
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~X() {dtor_called = true;}
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};
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bool X::dtor_called = false;
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int main(int, char**)
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{
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{
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optional<int> opt;
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static_assert(noexcept(opt.reset()) == true, "");
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opt.reset();
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assert(static_cast<bool>(opt) == false);
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}
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{
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optional<int> opt(3);
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opt.reset();
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assert(static_cast<bool>(opt) == false);
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}
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{
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optional<X> opt;
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static_assert(noexcept(opt.reset()) == true, "");
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assert(X::dtor_called == false);
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opt.reset();
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assert(X::dtor_called == false);
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assert(static_cast<bool>(opt) == false);
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}
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{
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optional<X> opt(X{});
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X::dtor_called = false;
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opt.reset();
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assert(X::dtor_called == true);
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assert(static_cast<bool>(opt) == false);
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X::dtor_called = false;
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}
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return 0;
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}
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