[Answered] Are DLLs compiled with Roslyn (C# 6) compatible with Linux/OSX KSP?

[Aelfhe1m]

I would like to take advantage of some of the new language features in C# 6/Visual Studio 2015 but I'm unsure whether the result is mono compatible. Testing on my Win 10 machine shows no problems. Anyone know if Linux or Mac OS versions of KSP would have any problem with the DLL? (The compile target is still .NET 3.5.)

Edited January 18, 2016 by Aelfhe1m
Set title to answered

[Aelfhe1m]

1 hour ago, Thomas P. said:

As long as they don't use .NET 4+ specific things, such as async, they are completely compatible with Mono, since the result is still valid IL code.

Thanks. Thought that should be the case but nice to have confirmation.

[sarbian]

They are. You can even compile with Roslyn on Linux. The last few Mechjeb-dev and  ModuleManager are build with Roslyn on Linux. 

I will most likely start to use C# features 6 soonish, but I am afraid of the impact of people who help with my mods...

[Aelfhe1m]

1 hour ago, sarbian said:

They are. You can even compile with Roslyn on Linux. The last few Mechjeb-dev and  ModuleManager are build with Roslyn on Linux. 

Oh, last I looked mono was still catching up with some of the Roslyn features (not that those specific features were ones I planned to use for modding) or has Microsoft released a Linux native compiler that I haven't noticed?

Quote

I will most likely start to use C# features 6 soonish, but I am afraid of the impact of people who help with my mods...

Yes, could be a concern with more collaborative mods but C# 6 is mostly just syntactic sugar.

After you've seen ?. and $"{}" used a couple of times I find it becomes second nature for most people. Anyone that's done a lot of Linq or Func programming is used to the => lambda arrow so expression body methods look natural too.

Edited January 17, 2016 by Aelfhe1m

[sarbian]

10 hours ago, Aelfhe1m said:

Oh, last I looked mono was still catching up with some of the Roslyn features (not that those specific features were ones I planned to use for modding) or has Microsoft released a Linux native compiler that I haven't noticed?

Yes, could be a concern with more collaborative mods but C# 6 is mostly just syntactic sugar.

After you've seen ?. and $"{}" used a couple of times I find it becomes second nature for most people. Anyone that's done a lot of Linq or Func programming is used to the => lambda arrow so expression body methods look natural too.

The mono compiler does not officially support .NET 3.5 so I did not want to take risk (and I somehow trust the MS compiler to generate better IL). Having Roslyn run on linux involve the really complex procedure of copying 8 files from a Windows PC  or a convenient project

 ?. and $"{} is what I am interested most. I have read that ?. may ont work properly with Unity object since they override the equality operator. I need to test that

Linq is nice but allocate far too many object with Unity old Mono. The Func is something I need to look into more since I don't really see the point so far (beside the compact form, and the obvious use with Linq)

Edited January 18, 2016 by sarbian

[Aelfhe1m]

9 hours ago, sarbian said:

I have read that ?. may ont work properly with Unity object since they override the equality operator. I need to test that

If I'm reading that article correctly then the override is only applied in the Unity editor itself so would not affect the vast majority of KSP mods that are never run there (may affect the debugging experience though if you hook up through Unity but I've not reached that level of complexity yet). I've done a little testing with FlightGlobals.ActiveVessel?.XXX and on the returned sub-objects and they seem to work as expected with no spurious values or NREs in the game log. Not definitive by any means but a hopeful indication.

Edited January 18, 2016 by Aelfhe1m
afterthought

[sarbian]

Great, I somehow missed the "Editor" part