WIP: Definition reference identifier

[macovedj]

Adding ability for ReferenceIdentifiers to have access to the definitions of the functions they reference as described in #395.

[sebmck]

This information shouldn't be in the AST. This makes the AST recursive by introducing a pointer to a possible parent node. If we visited the functionDefinition property as visitable then it would infinitely recurse. What if the function gets modified? The ReferenceIdentifier now has an outdated reference.

The resolution should be done in scope tracking. We just need to retain information to resolve bindings to a specific node.

[macovedj]

This information shouldn't be in the AST. This makes the AST recursive by introducing a pointer to a possible parent node. If we visited the functionDefinition property as visitable then it would infinitely recurse. What if the function gets modified? The ReferenceIdentifier now has an outdated reference.

The resolution should be done in scope tracking. We just need to retain information to resolve bindings to a specific node.

That makes a lot of sense. I'll give that a shot.

[sebmck]

Let me know if you need any help! Happy to assist in the Discord. Closing this since I'm trying to get a handle on open PRs. Feel free to open a new one with any additional changes. Thank you!