Feature request: parse using a specific syntatic goal

[devsnek]

It would be nice to be able to specify which specific goal to use when parsing something:

• a, b, c with FormalParameters[~Yield, ~Await] -> [Identifier, Identifier, Identifier]

• const a = 5; return a; with FunctionBody[~Yield, ~Await] -> [VariableDeclaration, ReturnStatement]

[adrianheine]

Since acorn doesn't use these goals internally that would be quite a lot of work. It could be possible to implement this on top of acorn.

[devsnek]

Yeah we managed to implement something. the only annoyance is the bitwise flags for what kind of function body is being parsed. Would it be acceptable to expose those in the public API?

[marijnh]

Yes, exporting those would make sense. Do you want to create a pull request? I'd prefer for them to be put into an object in the exported interface, to avoid adding a huge amount of exported identifiers.