/* Unit testing for outcomes
(C) 2013-2020 Niall Douglas <http://www.nedproductions.biz/> (2 commits)


Boost Software License - Version 1.0 - August 17th, 2003

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*/

#include <boost/outcome/outcome.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/test/unit_test_monitor.hpp>

BOOST_OUTCOME_AUTO_TEST_CASE(issues_0140_result, "Construction of non copy constructible value_type fails to not compile")
{
  namespace out = BOOST_OUTCOME_V2_NAMESPACE;

  enum op
  {
    constructed,
    moved,
    copied
  };
  struct NotCopyMoveConstructible
  {
    op v{op::constructed};
    NotCopyMoveConstructible() = default;
    NotCopyMoveConstructible(const NotCopyMoveConstructible &o) = delete;
    NotCopyMoveConstructible(NotCopyMoveConstructible &&) = delete;
    NotCopyMoveConstructible &operator=(const NotCopyMoveConstructible &) = delete;
    NotCopyMoveConstructible &operator=(NotCopyMoveConstructible &&) = delete;
    ~NotCopyMoveConstructible() = default;
  };
  struct NotMoveConstructible
  {
    op v{op::constructed};
    NotMoveConstructible() = default;
    NotMoveConstructible(const NotMoveConstructible & /*unused*/)
        : v(op::copied)
    {
    }
    NotMoveConstructible(NotMoveConstructible &&) = delete;
    NotMoveConstructible &operator=(const NotMoveConstructible &) = delete;
    NotMoveConstructible &operator=(NotMoveConstructible &&) = delete;
    ~NotMoveConstructible() = default;
  };
  struct NotCopyConstructible
  {
    op v{op::constructed};
    NotCopyConstructible() = default;
    NotCopyConstructible(NotCopyConstructible && /*unused*/) noexcept : v(op::moved) {}
    NotCopyConstructible(const NotCopyConstructible & /*unused*/) = delete;
    NotCopyConstructible &operator=(const NotCopyConstructible &) = delete;
    NotCopyConstructible &operator=(NotCopyConstructible &&) = delete;
    ~NotCopyConstructible() = default;
  };

  // Uncopyable and immovable items should be neither copyable nor moveable
  static_assert(!std::is_copy_constructible<out::result<NotCopyMoveConstructible>>::value, "result<NotCopyMoveConstructible> is copy constructible!");
  static_assert(!std::is_move_constructible<out::result<NotCopyMoveConstructible>>::value, "result<NotCopyMoveConstructible> is move constructible!");
  static_assert(!std::is_convertible<const NotCopyMoveConstructible &, NotCopyMoveConstructible>::value, "");
  static_assert(!std::is_convertible<NotCopyMoveConstructible &&, NotCopyMoveConstructible>::value, "");
  static_assert(!std::is_constructible<out::result<NotCopyMoveConstructible>, const NotCopyMoveConstructible &>::value, "result<NotCopyMoveConstructible> is constructible from const NotCopyMoveConstructible&!");
  static_assert(!std::is_constructible<out::result<NotCopyMoveConstructible>, NotCopyMoveConstructible &&>::value, "result<NotCopyMoveConstructible> is constructible from NotCopyMoveConstructible&&!");

  // Immovable items should fall back to copy
  static_assert(!std::is_move_constructible<NotMoveConstructible>::value, "NotMoveConstructible is move constructible!");
  static_assert(std::is_move_constructible<out::result<NotMoveConstructible>>::value, "result<NotMoveConstructible> is not move constructible!");
  static_assert(std::is_constructible<out::result<NotMoveConstructible>, const NotMoveConstructible &>::value, "result<NotMoveConstructible> is not constructible from NotMoveConstructible&&!");

  // Uncopyable items should never move (this was the bug report)
  static_assert(!std::is_copy_constructible<out::result<NotCopyConstructible>>::value, "result<NotCopyConstructible> is copy constructible!");
  static_assert(!std::is_constructible<out::result<NotCopyConstructible>, const NotCopyConstructible &>::value, "result<NotCopyConstructible> is constructible from const NotCopyConstructible&!");

  BOOST_CHECK(true);
}