incomplete type used in nested name specifier #2811

Life4gal · 2021-06-08T08:35:11Z

Life4gal
Jun 8, 2021

// my code
// data_form.hpp
#ifndef DATA_FORM_HPP
#define DATA_FORM_HPP

#include <array>
#include <cstdint>
#include <unordered_map>
#include <unordered_set>

#include "json.hpp"

namespace work {
	namespace data {

		struct normal_data {
			int64_t data;
		};

		struct normal_data_with_layer : normal_data {
			using layer_data = std::array<int64_t, 8>;

			using normal_data::normal_data;

			layer_data layer;
		};
	}// namespace data
}// namespace work

namespace std {
	template<>
	struct hash<work::data::normal_data> {
		size_t operator()(const work::data::normal_data& data) const {
			return std::hash<decltype(data.data)>()(data.data);
		}
	};

	template<>
	struct hash<work::data::normal_data_with_layer> {
		size_t operator()(const work::data::normal_data_with_layer& data) const {
			return std::hash<decltype(data.data)>()(data.data);
		}
	};
}// namespace std

namespace work {
	namespace data {
		constexpr const char* a1_name		  = "x";
		constexpr const char* a2_name	  = "xx";
		constexpr const char* a3_name	  = "xxx";
		constexpr const char* a4_name = "xxxx";
		constexpr const char* a5_name		  = "xxxxx";

		struct all_data {
			std::unordered_map<int64_t, normal_data>			a1;
			std::unordered_map<int64_t, normal_data>			a2;
			std::unordered_map<int64_t, normal_data>			a3
			std::unordered_map<int64_t, normal_data>			a4;
			std::unordered_map<int64_t, normal_data_with_layer> a5;
		};

		void to_json(nlohmann::json& j, const all_data& data) {
			j = nlohmann::json{
					{a1_name, nlohmann::json::parse(data.a1)},
					{a2_name, nlohmann::json::parse(data.a2)},
					{a3_name, nlohmann::json::parse(data.a3)},
					{a4_name, nlohmann::json::parse(data.a4)},
					{a5_name, nlohmann::json::parse(data.a5)}};
		}
	}// namespace data
}// namespace work

#endif//DATA_FORM_HPP

// main.cpp
#include "data_form.hpp"

#include <iostream>
#include <iomanip>

int main()
{
	using namespace work::data;

	all_data data;
	data.a1[1].data = 2;
	data.a1[2].data = 2;
	data.a2[1].data = 1;
	data.a2[2].data = 1;
	data.a3[10].data = 10;
	data.a4[20].data = 20;
	data.a5[100].data = 20;
	data.a5[100].layer = {1, 2, 3};

	nlohmann::json j{data};

	std::cout << std::setw(4) << j.dump() << std::endl;
}

// error code
Scanning dependencies of target work
[100%] Building CXX object CMakeFiles/work.dir/main.cpp.o
In file included from /home/xx/data_form.hpp:9:0,
                 from /home/xx/main.cpp:1:
/home/xx/json.hpp: In instantiation of ‘void nlohmann::detail::wide_string_input_adapter<BaseInputAdapter, WideCharType>::fill_buffer() [with long unsigned int T = 16ul; BaseInputAdapter = nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data>, false, false> >; WideCharType = std::pair<const long int, work::data::normal_data>]’:
/home/xx/json.hpp:5524:24:   required from ‘std::char_traits<char>::int_type nlohmann::detail::wide_string_input_adapter<BaseInputAdapter, WideCharType>::get_character() [with BaseInputAdapter = nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data>, false, false> >; WideCharType = std::pair<const long int, work::data::normal_data>; std::char_traits<char>::int_type = int]’
/home/xx/json.hpp:7764:21:   required from ‘nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::char_int_type nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::get() [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data>, false, false> >, std::pair<const long int, work::data::normal_data> >; nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::char_int_type = int]’
/home/xx/json.hpp:7903:17:   required from ‘bool nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::skip_bom() [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data>, false, false> >, std::pair<const long int, work::data::normal_data> >]’
/home/xx/json.hpp:7927:57:   required from ‘nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::token_type nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::scan() [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data>, false, false> >, std::pair<const long int, work::data::normal_data> >; nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::token_type = nlohmann::detail::lexer_base<nlohmann::basic_json<> >::token_type]’
/home/xx/json.hpp:11104:27:   required from ‘nlohmann::detail::parser<BasicJsonType, InputAdapterType>::token_type nlohmann::detail::parser<BasicJsonType, InputAdapterType>::get_token() [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data>, false, false> >, std::pair<const long int, work::data::normal_data> >; nlohmann::detail::parser<BasicJsonType, InputAdapterType>::token_type = nlohmann::detail::lexer_base<nlohmann::basic_json<> >::token_type]’
/home/xx/json.hpp:10749:38:   required from ‘void nlohmann::detail::parser<BasicJsonType, InputAdapterType>::parse(bool, BasicJsonType&) [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data>, false, false> >, std::pair<const long int, work::data::normal_data> >]’
/home/xx/json.hpp:23812:9:   required from ‘static nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType> nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType>::parse(InputType&&, nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType>::parser_callback_t, bool, bool) [with InputType = const std::unordered_map<long int, work::data::normal_data>&; ObjectType = std::map; ArrayType = std::vector; StringType = std::basic_string<char>; BooleanType = bool; NumberIntegerType = long int; NumberUnsignedType = long unsigned int; NumberFloatType = double; AllocatorType = std::allocator; JSONSerializer = nlohmann::adl_serializer; BinaryType = std::vector<unsigned char>; nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType>::parser_callback_t = std::function<bool(int, nlohmann::detail::parse_event_t, nlohmann::basic_json<>&)>]’
/home/xx/data_form.hpp:68:50:   required from here
/home/xx/json.hpp:5542:129: error: incomplete type ‘nlohmann::detail::wide_string_input_helper<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data>, false, false> >, 16ul>’ used in nested name specifier
         wide_string_input_helper<BaseInputAdapter, T>::fill_buffer(base_adapter, utf8_bytes, utf8_bytes_index, utf8_bytes_filled);
                                                                                                                                 ^
/home/xx/json.hpp: In instantiation of ‘void nlohmann::detail::wide_string_input_adapter<BaseInputAdapter, WideCharType>::fill_buffer() [with long unsigned int T = 80ul; BaseInputAdapter = nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data_with_layer>, false, false> >; WideCharType = std::pair<const long int, work::data::normal_data_with_layer>]’:
/home/xx/json.hpp:5524:24:   required from ‘std::char_traits<char>::int_type nlohmann::detail::wide_string_input_adapter<BaseInputAdapter, WideCharType>::get_character() [with BaseInputAdapter = nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data_with_layer>, false, false> >; WideCharType = std::pair<const long int, work::data::normal_data_with_layer>; std::char_traits<char>::int_type = int]’
/home/xx/json.hpp:7764:21:   required from ‘nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::char_int_type nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::get() [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data_with_layer>, false, false> >, std::pair<const long int, work::data::normal_data_with_layer> >; nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::char_int_type = int]’
/home/xx/json.hpp:7903:17:   required from ‘bool nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::skip_bom() [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data_with_layer>, false, false> >, std::pair<const long int, work::data::normal_data_with_layer> >]’
/home/xx/json.hpp:7927:57:   required from ‘nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::token_type nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::scan() [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data_with_layer>, false, false> >, std::pair<const long int, work::data::normal_data_with_layer> >; nlohmann::detail::lexer<BasicJsonType, InputAdapterType>::token_type = nlohmann::detail::lexer_base<nlohmann::basic_json<> >::token_type]’
/home/xx/json.hpp:11104:27:   required from ‘nlohmann::detail::parser<BasicJsonType, InputAdapterType>::token_type nlohmann::detail::parser<BasicJsonType, InputAdapterType>::get_token() [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data_with_layer>, false, false> >, std::pair<const long int, work::data::normal_data_with_layer> >; nlohmann::detail::parser<BasicJsonType, InputAdapterType>::token_type = nlohmann::detail::lexer_base<nlohmann::basic_json<> >::token_type]’
/home/xx/json.hpp:10749:38:   required from ‘void nlohmann::detail::parser<BasicJsonType, InputAdapterType>::parse(bool, BasicJsonType&) [with BasicJsonType = nlohmann::basic_json<>; InputAdapterType = nlohmann::detail::wide_string_input_adapter<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data_with_layer>, false, false> >, std::pair<const long int, work::data::normal_data_with_layer> >]’
/home/xx/json.hpp:23812:9:   required from ‘static nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType> nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType>::parse(InputType&&, nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType>::parser_callback_t, bool, bool) [with InputType = const std::unordered_map<long int, work::data::normal_data_with_layer>&; ObjectType = std::map; ArrayType = std::vector; StringType = std::basic_string<char>; BooleanType = bool; NumberIntegerType = long int; NumberUnsignedType = long unsigned int; NumberFloatType = double; AllocatorType = std::allocator; JSONSerializer = nlohmann::adl_serializer; BinaryType = std::vector<unsigned char>; nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType>::parser_callback_t = std::function<bool(int, nlohmann::detail::parse_event_t, nlohmann::basic_json<>&)>]’
/home/xx/data_form.hpp:72:54:   required from here
/home/xx/json.hpp:5542:129: error: incomplete type ‘nlohmann::detail::wide_string_input_helper<nlohmann::detail::iterator_input_adapter<std::__detail::_Node_const_iterator<std::pair<const long int, work::data::normal_data_with_layer>, false, false> >, 80ul>’ used in nested name specifier
gmake[3]: *** [CMakeFiles/work.dir/test_main.cpp.o] Error 1
gmake[2]: *** [CMakeFiles/work.dir/all] Error 2
gmake[1]: *** [CMakeFiles/work.dir/rule] Error 2
gmake: *** [work] Error 2

compiler gcc 4.8.5

Answered by Life4gal

Jun 8, 2021

// I forgot this!
struct normal_data {
	int64_t data;
};

struct normal_data_with_layer : normal_data {
	using layer_data = std::array<int64_t, 8>;

	using normal_data::normal_data;

	layer_data layer;
};

NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(normal_data, data);
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(normal_data_with_layer, data, layer);

// and parse is not needed
j = nlohmann::json{
	{a1_name, nlohmann::json::parse(data.a1)},
	{a2_name, nlohmann::json::parse(data.a2)},
	{a3_name, nlohmann::json::parse(data.a3)},
	{a4_name, nlohmann::json::parse(data.a4)},
	{a5_name, nlohmann::json::parse(data.a5)}};
}
// but...
// result of std::cout << std::setw(4) << j.dump(4) << std::endl;
[
    {
        "a1

View full answer

Life4gal · 2021-06-08T08:52:24Z

Life4gal
Jun 8, 2021
Author

even I put everything in global namespace, nothing work :(

0 replies

Life4gal · 2021-06-08T09:26:37Z

Life4gal
Jun 8, 2021
Author

// I forgot this!
struct normal_data {
	int64_t data;
};

struct normal_data_with_layer : normal_data {
	using layer_data = std::array<int64_t, 8>;

	using normal_data::normal_data;

	layer_data layer;
};

NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(normal_data, data);
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(normal_data_with_layer, data, layer);

// and parse is not needed
j = nlohmann::json{
	{a1_name, nlohmann::json::parse(data.a1)},
	{a2_name, nlohmann::json::parse(data.a2)},
	{a3_name, nlohmann::json::parse(data.a3)},
	{a4_name, nlohmann::json::parse(data.a4)},
	{a5_name, nlohmann::json::parse(data.a5)}};
}
// but...
// result of std::cout << std::setw(4) << j.dump(4) << std::endl;
[
    {
        "a1": [
            [
                2,
                {
                    "data": 2
                }
            ],
            [
                1,
                {
                    "data": 2
                }
            ]
        ],
        "a2": [
            [
                2,
                {
                    "data": 1
                }
            ],
            [
                1,
                {
                    "data": 1
                }
            ]
        ],
        "a3": [
            [
                20,
                {
                    "data": 20
                }
            ]
        ],
        "a4": [
            [
                10,
                {
                    "data": 10
                }
            ]
        ],
        "a5": [
            [
                100,
                {
                    "data": 20,
                    "layer": [
                        1,
                        2,
                        3,
                        0,
                        0,
                        0,
                        0,
                        0
                    ]
                }
            ]
        ]
    }
]
// too many parentheses...

0 replies

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incomplete type used in nested name specifier #2811

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incomplete type used in nested name specifier #2811

Life4gal Jun 8, 2021

Replies: 2 comments

Life4gal Jun 8, 2021 Author

Life4gal Jun 8, 2021 Author

Life4gal
Jun 8, 2021

Life4gal
Jun 8, 2021
Author

Life4gal
Jun 8, 2021
Author