58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
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//===----------------------------------------------------------------------===//
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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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// ~optional();
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#include <optional>
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#include <type_traits>
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#include <cassert>
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#if _LIBCPP_STD_VER > 11
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class X
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{
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public:
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static bool dtor_called;
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X() = default;
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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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#endif // _LIBCPP_STD_VER > 11
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int main()
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{
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#if _LIBCPP_STD_VER > 11
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{
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typedef int T;
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static_assert(std::is_trivially_destructible<T>::value, "");
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static_assert(std::is_trivially_destructible<std::optional<T>>::value, "");
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}
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{
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typedef double T;
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static_assert(std::is_trivially_destructible<T>::value, "");
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static_assert(std::is_trivially_destructible<std::optional<T>>::value, "");
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}
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{
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typedef X T;
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static_assert(!std::is_trivially_destructible<T>::value, "");
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static_assert(!std::is_trivially_destructible<std::optional<T>>::value, "");
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{
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X x;
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std::optional<X> opt{x};
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assert(X::dtor_called == false);
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}
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assert(X::dtor_called == true);
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}
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#endif // _LIBCPP_STD_VER > 11
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}
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