new_infrastructure: Nodes with same field are not distinguished

[havogt]

If I have

class FieldAccess(Expr):
    name: Str

class VarAccess(Expr):
    name: Str

the visitor will not distinguish the 2 nodes. It will enter visit_FieldAccess even for VarAccess. This can be solved by type annotating the visit method's node argument.

However, no such workaround exists for the templates in the TemplatedGenerator. Adding an extra field in one of the 2 classes works, e.g.

class VarAccess(Expr):
    name: Str
    dummy: Optional[str]