ArrowFunction vs Function

[fuhrmanator]

Should the metamodel distinguish between a Function and an ArrowFunction?

ts-morph certainly does (currently the importer doesn't find ArrowFunction as far as I know).

Compared to Functions, ArrowFunctions don't have a name, and there's a "this" context/binding (not sure if it's important in a MM).

[NicolasAnquetil]

if ts-morph distinguishes them, then it is probably a good idea to do it also in the meta-model

[fuhrmanator]

fixed in #18