Cannot build with VS 2019 / C++17

[Mecanik]

What is the issue you have?

I'v trying desperately to add this to my project so I can read some complex JSON, however I can't even compile it... not even to get to the part where I write a line of it.

I have tried both the latest release, current branch, as well as single include / normal include. Nothing works, and I`m not sure why I have this problem.

1>C:\...\include\nlohmann\json.hpp(8622,1): error C2062: type 'unknown-type' unexpected
1>C:\...\include\nlohmann\json.hpp(8623,1): error C3536: 'h': cannot be used before it is initialized
1>C:\...\include\nlohmann\json.hpp(8623,16): error C2064: term does not evaluate to a function taking 1 arguments

Please describe the steps to reproduce the issue.

1. Create console project, set debug mode, x64
2. Set ISO C++17 Standard (std:c++17), /MT
3. Try to compile

Can you provide a small but working code example?

What is the expected behavior?

And what is the actual behavior instead?

Which compiler and operating system are you using?

• Compiler: Microsoft Visual C++ 2019
• Operating system: Windows 10

Which version of the library did you use?

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

If you experience a compilation error: can you compile and run the unit tests?

• yes
• no - please copy/paste the error message below

PS: I believe the message "please copy/paste the error message below" should be added next to the "yes" and not "no" ? Because if "no" = I don't have compilation error.

PPS: There is a DOZEN of examples, which is great! However there is no "simple" example for newcomers, for example a simple array loop, object, etc. Or maybe I am just not seeing it (due to the HUGE ReadMe file).

[Mecanik]

Found the issue... it seems I am not allowed to have:

using namespace boost;
using namespace boost::posix_time;
using namespace boost::property_tree;

Amongst other namespaces... which I had to remove all of them.

Thanks anyway...