Re: Questions about dmd source

[ketmar via Digitalmars-d-learn]

Francis Nixon wrote:


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)?
types has some built-in properties, like `.length`, `.sizeof`, `.init` and 
so on. this method is used to access those properties.



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?
it just was done this way. dmd parser was "evolved", so what you see is a 
result of evolution (it is not stopeed yet ;-), and evolution doesn't 
produce ideal results. there is no need to specifically "fix" working 
things, it doesn't do any good.

Re: Questions about dmd source

[Anton Fediushin via Digitalmars-d-learn]

On Sunday, 30 July 2017 at 06:18:16 UTC, Francis Nixon wrote:
I have two completely unrelated questions about the dmd source 
code.


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?


It is impossible to write short parser, and goto operators are 
quite useful in such code.
Also, there is no need to rewrite anything unless it is slow or 
buggy, and parse.d probably isn't.