daw_json_data_contract.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 "impl/version.h"
 
#include <type_traits>
 
namespace daw::json {
  inline namespace DAW_JSON_VER {
    template<typename>
    struct missing_json_data_contract_for_or_unknown_type;
 
    template<typename T>
    inline constexpr bool is_missing_data_contract_or_unknown_type_v = false;
 
    template<>
    inline constexpr bool is_missing_data_contract_or_unknown_type_v<void> =
      true;
 
    template<typename T>
    inline constexpr bool is_missing_data_contract_or_unknown_type_v<
      missing_json_data_contract_for_or_unknown_type<T>> = true;
 
    template<typename T, typename = void>
    struct json_data_contract {
      using type = missing_json_data_contract_for_or_unknown_type<T>;
    };
 
    template<typename T>
    using json_data_contract_trait_t = typename json_data_contract<T>::type;
  } // namespace DAW_JSON_VER
} // namespace daw::json