Previous system linked the variable name with the saved value, meaning the variable could not be renamed or moved outside the global scope.
Instead we propose to store all persistent values in a global table, identifying each by a key. To still allow nice manipulation with identifiers, the alias syntax replace the persistent syntax for symbols - an aliases symbol will act as if a function call was used in place of the identifier when it appear.
The previous system needed to store of the scope and full AST to build a Resumable object, which means that if persisted, updating the resumable script will have no effect.
The new system instead uses an anchor token and does not require any information besides the anchor name.
Woke up and felt like changing a couple things. It's actually been worked on for a while, little at a time...
The goal was to make the language and implementation much simpler. Well I don't know if it really ended up being simpler but it sure is more robust.
Main changes:
* proper first class functions and closures supports! proper scoping rules! no more namespace shenanigans!
* everything is an expression, no more statements! make the implementation both simpler and more complex, but it's much more consistent now! the syntax has massively changed as a result though.
* much more organized and easy to modify codebase: one file for each AST node, no more random fields or behavior set by some random node exceptionally, everything should now follow the same API defined in ast.abstract.Node
Every foundational feature should be implemented right now. The vast majority of things that were possible in v2 are possible now; some things aren't, but that's usually because v2 is a bit more sane.
The main missing things before a proper release are tests and documentation. There's a few other things that might be implemented later, see the ideas.md file.
