Many version of the function "void to_json(json& j, const MyStruct& struct)"

[Orionus]

I have created two version of the function:
static void to_json(json& j, const MyStruct& struct) {...};
in modul_1.cpp and modul_2.cpp, but modul_1.cpp uses function not from itself but from modul_2.cpp

What do you want to achieve?

how to declare void to_json(json& j, const MyStruct& struct) in two modules so that each one uses its own version?

What have you tried?

Can you provide a small code example?

Which compiler and operating system are you using?

• Compiler: gcc 9.2.0
• Operating system: Windows 10

Which version of the library did you use?

• latest release version 3.7.3
• other release - please state the version: ___
• the develop branch

[nlohmann]

I think this is not possible. See https://github.com/nlohmann/json#basic-usage ("Some important things"). There can only be one implementation per type.

[FrancoisChabot]

That's really weird. as long as:

1. static to_json() is implemented in the .cpp files
2. static to_json() are a free-floating functions, and not a static member function
3. Both .cpp files are compiled as separate translation units (as opposed to both being #included in a master .cpp file)

It shouldn't be possible for the code from modul_1.cpp to directly use the function defined in modul_2.cpp.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.