Enable access to scope for every node in the AST

[goelayu]

Inspired by the scope feature available in babel while traversing the ast, wondering if something similar is already available, or could be added to swc?

Example use of how scope information can aid transformations:

visitor {
   Identifier(path){
        if (path.scope.hasOwnBindings(path.node.name) // this identifier is a locally declared variable
            path.node.name = "x"
    }
}

Surely something similar can be done by tracking additional state while using swc, but wondering if any API already exists for this purpose, or any plans to add it?

[kdy1]

Simply, it can't be added.
If you study Rust more, you will understand the constraint

[goelayu]

Thanks for the prompt response!

In my mini benchmarks, I am seeing swc performing 3x faster than babel so I am very much tempted to migrate my plugins to swc, but the lack of helpers will mean more developer time.
The unfortunate trade-off between developer time and compute time ugh!!

(Thanks for writing this tool though, much appreciated)