daw_json_reflection_helpers.h

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// Copyright (c) Darrell Wright
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/beached/daw_json_link
//
 
#pragma once
 
#include "daw/json/impl/version.h"
 
#include "daw/json/daw_json_switches.h"
 
#if defined( DAW_JSON_HAS_REFLECTION )
 
#include <meta>
 
namespace daw::json::inline DAW_JSON_VER::refl_details {
  consteval std::vector<std::meta::info>
  pub_nsdm_of( std::meta::info type_class ) {
    return nonstatic_data_members_of(
      type_class, std::meta::access_context::unprivileged( ) );
  }
 
  consteval std::vector<std::meta::info>
  all_nsdm_of( std::meta::info type_class ) {
    return nonstatic_data_members_of( type_class,
                                      std::meta::access_context::unchecked( ) );
  }
 
  template<typename T>
  concept PublicMembersOnly = all_nsdm_of( remove_cvref( ^^T ) ).size( ) ==
                              pub_nsdm_of( remove_cvref( ^^T ) ).size( );
  // The type may not be reflectable but we can error later
  template<typename T>
  concept PotentiallyReflectable =
    not std::is_empty_v<T> and std::is_class_v<T> and std::is_aggregate_v<T> and
    PublicMembersOnly<T>;
} // namespace daw::json::inline DAW_JSON_VER::refl_details
#endif