| //===----------------------------------------------------------------------===// |
| // |
| // 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; |
| } |
| } |