Draft bootstrap decl

[duckdoom5]

Okay so I managed to generate a Declaration.h file from clang source, but I'm a bit stuck.

• Some properties from clang are missed due to parsing/converter issues
• Some fields should be removed since they can be mapped to simple functions
• The original decl types add a bunch of properties that no longer exist

Since they don't really match, it's not easy to map the new data to the old one. I'm not sure how to go from here.. I kinda need this new data to properly support everything and implement the recursive AST visitor we talked about before.

I feel like the only way to get this done is to slowly convert each of the original decls to the new version, but I also don't want to waste time. Any suggestions/ideas to reduce the amount of time required for this task?

Note: This code is my first pass! Definitely not ready for review XD

[tritao]

I guess first let me ask you what do you hope to get out of this change.

Is this mainly to be able to use the Clang's Recursive AST visitor, and as such try to minimize the risk of crashes we have in complex where our walking of Clang AST might be erronous / incomplete?

Is there some other advantages you are thinking about?

[duckdoom5]

It's 3 things really:

• Add properties we are missing currently
  • With those added, we'd be able to use clang's implementation of the AST dumper, which means we'll have a complete AST
• Future proofing
  • C++23 is around the corner. If we have this generator automated, it should be a click of a button and maybe some fixes to add support for new language features. We kinda already see this happening now, where C++20 features are not really supported
• Avoid implementation bugs.
  • Make sure the properties are actually set.
    While working on this, I found that a bunch of properties that are available on the C# side are never assigned to (eg. Class.IsStatic and Class.TemplateParameters are never assigned to, but are used throughout the codebase a lot).