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//===----------------------------------------------------------------------===//
//
// 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, c++14
// <optional>
// void reset() noexcept;
#include <optional>
#include <type_traits>
#include <cassert>
using std::optional;
struct X
{
static bool dtor_called;
~X() {dtor_called = true;}
};
bool X::dtor_called = false;
int main()
{
{
optional<int> opt;
static_assert(noexcept(opt.reset()) == true, "");
opt.reset();
assert(static_cast<bool>(opt) == false);
}
{
optional<int> opt(3);
opt.reset();
assert(static_cast<bool>(opt) == false);
}
{
optional<X> opt;
static_assert(noexcept(opt.reset()) == true, "");
assert(X::dtor_called == false);
opt.reset();
assert(X::dtor_called == false);
assert(static_cast<bool>(opt) == false);
}
{
optional<X> opt(X{});
X::dtor_called = false;
opt.reset();
assert(X::dtor_called == true);
assert(static_cast<bool>(opt) == false);
X::dtor_called = false;
}
}
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