result.hpp

 
/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
 *
 * Distributed under the Boost Software License, Version 1.0. (See
 * accompanying file LICENSE.txt)
 */
 
#ifndef BOOST_REDIS_ADAPTER_RESULT_HPP
#define BOOST_REDIS_ADAPTER_RESULT_HPP
 
#include <boost/redis/resp3/type.hpp>
#include <boost/redis/error.hpp>
#include <boost/system/result.hpp>
#include <string>
 
namespace boost::redis::adapter
{
 
struct error {
   resp3::type data_type = resp3::type::invalid;
 
   std::string diagnostic;
};
 
inline bool operator==(error const& a, error const& b)
{
   return a.data_type == b.data_type && a.diagnostic == b.diagnostic;
}
 
inline bool operator!=(error const& a, error const& b)
{
   return !(a == b);
}
 
template <class Value>
using result = system::result<Value, error>;
 
BOOST_NORETURN inline void
throw_exception_from_error(error const & e, boost::source_location const &)
{
   system::error_code ec;
   switch (e.data_type) {
      case resp3::type::simple_error:
         ec = redis::error::resp3_simple_error;
         break;
      case resp3::type::blob_error:
         ec = redis::error::resp3_blob_error;
         break;
      case resp3::type::null:
         ec = redis::error::resp3_null;
         break;
      default:
         BOOST_ASSERT_MSG(false, "Unexpected data type.");
   }
 
   throw system::system_error(ec, e.diagnostic);
}
 
} // boost::redis::adapter
 
#endif // BOOST_REDIS_ADAPTER_RESULT_HPP