/* Exception observers for outcome type
(C) 2017-2021 Niall Douglas <http://www.nedproductions.biz/> (3 commits)
File Created: Oct 2017


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

Permission is hereby granted, free of charge, to any person or organization
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*/

#ifndef BOOST_OUTCOME_BASIC_OUTCOME_EXCEPTION_OBSERVERS_HPP
#define BOOST_OUTCOME_BASIC_OUTCOME_EXCEPTION_OBSERVERS_HPP

#include "basic_result_storage.hpp"

BOOST_OUTCOME_V2_NAMESPACE_EXPORT_BEGIN

namespace detail
{
  template <class Base, class R, class S, class P, class NoValuePolicy> class basic_outcome_exception_observers : public Base
  {
  public:
    using exception_type = P;
    using Base::Base;

    constexpr inline exception_type &assume_exception() & noexcept;
    constexpr inline const exception_type &assume_exception() const &noexcept;
    constexpr inline exception_type &&assume_exception() && noexcept;
    constexpr inline const exception_type &&assume_exception() const &&noexcept;

    constexpr inline exception_type &exception() &;
    constexpr inline const exception_type &exception() const &;
    constexpr inline exception_type &&exception() &&;
    constexpr inline const exception_type &&exception() const &&;
  };

  // Exception observers not present
  template <class Base, class R, class S, class NoValuePolicy> class basic_outcome_exception_observers<Base, R, S, void, NoValuePolicy> : public Base
  {
  public:
    using Base::Base;
    constexpr void assume_exception() const noexcept { NoValuePolicy::narrow_exception_check(this); }
    constexpr void exception() const { NoValuePolicy::wide_exception_check(this); }
  };

}  // namespace detail

BOOST_OUTCOME_V2_NAMESPACE_END

#endif
