Build error using json.hpp on project that uses swig (ICG)

[yusufcananar]

Hello, I am trying to integrate nlohmann/json.hpp to a project(trick) which uses swig to generate codes.
In a single main file, example project that i have made, there is no error but with the project(trick) I mentioned I get this error below:

io_src/io_json.cpp: In function ‘void io_src_destruct_nlohmann__json_abi_v3_11_3__detail__nonesuch(void*, int)’:
io_src/io_json.cpp:63:27: error: use of deleted function ‘nlohmann::json_abi_v3_11_3::detail::nonesuch::~nonesuch()’
   63 |         temp[ii].~nonesuch();
      |         ~~~~~~~~~~~~~~~~~~^~
In file included from io_src/io_json.cpp:19:
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:269:5: note: declared here
  269 |     ~nonesuch() = delete;
      |     ^
/usr/bin/g++ -I/home/fjolnirr/trick/third_party/include -I/usr/local/include/mongocxx/v_noabi -I/usr/local/include/bsoncxx/v_noabi -I/usr/local/include/bsoncxx/v_noabi/bsoncxx/third_party/mnmlstc -Wno-unused-but-set-variable -isystem/home/fjolnirr/trick/trick_source -isystem/home/fjolnirr/trick/include -isystem/home/fjolnirr/trick/include/trick/compat -DTRICK_VER=19 -DTRICK_MINOR=7 -fpic  -DUSE_ER7_UTILS_INTEGRATORS -std=c++11 -Wno-invalid-offsetof -c io_src/io_lqueue.cpp -o object_Linux_11.4_x86_64/io_lqueue.o
io_src/io_json.cpp: In function ‘void io_src_delete_nlohmann__json_abi_v3_11_3__detail__nonesuch(void*)’:
io_src/io_json.cpp:68:59: error: use of deleted function ‘nlohmann::json_abi_v3_11_3::detail::nonesuch::~nonesuch()’
   68 |     delete (nlohmann::json_abi_v3_11_3::detail::nonesuch*)address;
      |                                                           ^~~~~~~
In file included from io_src/io_json.cpp:19:
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:269:5: note: declared here
  269 |     ~nonesuch() = delete;
      |     ^
io_src/io_json.cpp: In function ‘void* io_src_allocate_nlohmann__json_abi_v3_11_3__detail__dtoa_impl__boundaries(int)’:
io_src/io_json.cpp:1265:82: error: use of deleted function ‘nlohmann::json_abi_v3_11_3::detail::dtoa_impl::boundaries::boundaries()’
 1265 |         new(&temp[ii]) nlohmann::json_abi_v3_11_3::detail::dtoa_impl::boundaries();
      |                                                                                  ^
In file included from io_src/io_json.cpp:19:
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:17083:8: note: ‘nlohmann::json_abi_v3_11_3::detail::dtoa_impl::boundaries::boundaries()’ is implicitly deleted because the default definition would be ill-formed:
17083 | struct boundaries
      |        ^~~~~~~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:17083:8: error: no matching function for call to ‘nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp()’
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16972:15: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(uint64_t, int)’
16972 |     constexpr diyfp(std::uint64_t f_, int e_) noexcept : f(f_), e(e_) {}
      |               ^~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16972:15: note:   candidate expects 2 arguments, 0 provided
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(const nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp&)’
16965 | struct diyfp // f * 2^e
      |        ^~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note:   candidate expects 1 argument, 0 provided
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp&&)’
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note:   candidate expects 1 argument, 0 provided
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:17083:8: error: no matching function for call to ‘nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp()’
17083 | struct boundaries
      |        ^~~~~~~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16972:15: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(uint64_t, int)’
16972 |     constexpr diyfp(std::uint64_t f_, int e_) noexcept : f(f_), e(e_) {}
      |               ^~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16972:15: note:   candidate expects 2 arguments, 0 provided
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(const nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp&)’
16965 | struct diyfp // f * 2^e
      |        ^~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note:   candidate expects 1 argument, 0 provided
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp&&)’
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note:   candidate expects 1 argument, 0 provided
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:17083:8: error: no matching function for call to ‘nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp()’
17083 | struct boundaries
      |        ^~~~~~~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16972:15: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(uint64_t, int)’
16972 |     constexpr diyfp(std::uint64_t f_, int e_) noexcept : f(f_), e(e_) {}
      |               ^~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16972:15: note:   candidate expects 2 arguments, 0 provided
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(const nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp&)’
16965 | struct diyfp // f * 2^e
      |        ^~~~~
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note:   candidate expects 1 argument, 0 provided
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note: candidate: ‘constexpr nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp::diyfp(nlohmann::json_abi_v3_11_3::detail::dtoa_impl::diyfp&&)’
/home/fjolnirr/trick/third_party/include/nlohmann/json.hpp:16965:8: note:   candidate expects 1 argument, 0 provided

I dont use any of them only usage of json in this function;

nlohmann::json Trick::DRMongo::variable_string_to_json(nlohmann::json j, std::string str, std::string value){
    replace(str.begin(), str.end(), '.', '/');
    replace(str.begin(), str.end(), '[', '/');
    str.erase(remove(str.begin(), str.end(), ']'), str.end());

    j[nlohmann::json::json_pointer('/' + str)] = value;
    std::cout << j.dump() << "\n";
    return j;
}

I think swig covers all the lines in the json.hpp but i dont know what should I do. Is removing or commenting this lines is a good practice?

[gregmarr]

You need to tell SWIG to ignore that class. https://www.swig.org/Doc1.3/SWIG.html#SWIG_rename_ignore

[yusufcananar]

This worked. However project is quite big and has its own build system So I am not sure if excluding the class with json lib will be affected bad or or stay neutral. I have added

#ifndef SWIG 
#endif

at everywhere i used nlohmann::json But why is not usable with swig? Is it not supported? or sth else (I am not familiar with the swig)

[gregmarr]

I don't that anyone has tried using it with SWIG before, but it should be fairly simple to ignore that one problematic class in the swig interface file.

%ignore detail::nonesuch