Questions about dmd source

[Francis Nixon via Digitalmars-d-learn]

I have two completely unrelated questions about the dmd source 
code.

1. What does the mtype.Type.dotExp method do? The documentation 
comment says that it "Accesses the members of the object e". I'm 
not sure exactly why I would want to do that? Is it for handling 
types specified using an identifier/template chain (aka 
foo.bar!(uint).c)?

2. I've noticed there are some rather long methods in the dmd 
source, involving more than one goto; parse.d is particularly 
bad. Is there a reason for this/is it being fixed?