Backend nearly entirely converted to D

[welkam]

On Wednesday, 7 November 2018 at 00:01:13 UTC, Walter Bright 
wrote:
> On 11/6/2018 3:00 PM, H. S. Teoh wrote:
>> What sort of refactoring are we looking at?  Any low-hanging 
>> fruit here
>> that we non-compiler-experts can chip away at?
>
> Simply going with foreach loops is a nice improvement.

Thas sounds like a job that I can do. At this moment I am reading 
DMD source code starting from main() because when I tried to 
understand part of something I wanted to change it felt that to 
understand something you basically need to understand a third of 
compiler.

One of biggest and needless hurdle I face in reading DMD code is 
single letter variable name. If I change one letter variable 
names to more descriptive ones would that patch be welcomed or 
considered needless change?