outcome.h

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#pragma once
 
#include "./result.h"
#include "./status.h"
 
namespace emlabcpp
{
 
enum class outcome_e : uint8_t
{
        SUCCESS = 0,
        FAILURE = 1,
        ERROR   = 2,
};
 
struct [[nodiscard]] outcome : status< outcome, outcome_e >
{
        using status::status;
        using enum outcome_e;
 
        constexpr outcome( result const r ) noexcept
          : status( r == result::SUCCESS ? outcome_e::SUCCESS : outcome_e::ERROR )
        {
        }
 
        constexpr outcome( result_e const r ) noexcept
          : status( r == result::SUCCESS ? outcome_e::SUCCESS : outcome_e::ERROR )
        {
        }
 
        constexpr operator result() const noexcept
        {
                return value() == outcome_e::SUCCESS ? result::SUCCESS : result::ERROR;
        }
};
 
}  // namespace emlabcpp