C++ PCH warning: header stop not at file scope. An IntelliSense PCH file was not generated.

[vhnatiuk]

I have added jsoncons as an submodule to my project. Trying to use it in my code, but when I added the include
#include <jsoncons_ext/bson/bson.hpp> to my .h or .cpp file, I'm getting error from the discussion title in the code editor, and a lot of compile errors after build of the project from the include\jsoncons\detail\optional.hpp file.

I have added the path to the jsoncons include directory to the project Additional include Directories.
I'm using VS 2019.

[danielaparker]

Can you confirm which C++ Language Standard you're using? Is it C++14? Are you using C++14 consistently?

The fact that these errors are seen in detail/optional.hpp, and that you're using precompiled headers, makes me think that there's an issue with consistency in language standards selected. Inclusion of detail/optional.hpp is #defined out altogether if C++17 is selected.

[vhnatiuk]

Also I tried the C++ 17 and C++ 20 and I have the same issue.

[danielaparker]

You couldn't have the same issue if you compiled with C++17 or C++20, for those settings, the detail/optional.hpp would never be included, you could delete that file and it wouldn't make any difference for compilation, I just did, and it didn't. If you're seeing an error related to detail/optional.hpp , than you're not consistently compiling with C++17 or C++20.

[vhnatiuk]

[vhnatiuk]

Yes, two more errors appear related with byte. I'm trying find out how to resolve it.

[vhnatiuk]

When I remove the include of any of jsoncons header, my project build with no error.