[spec] Phases of translation

[Dibyendu Majumdar]

Hi,

In the introduction there is a section named 'Phases of 
Compilation'. Following the convention used in C standard, I am 
calling this 'Translation Phases'; translation is a more generic 
term too. See https://github.com/dlang/dlang.org/pull/2646/files 
for some initial rewording.

The recent post 
https://forum.dlang.org/post/xnoeazcqnysodqnjphhc@forum.dlang.org 
got me thinking that actually we should expand the 'Translation 
Phases' section to describe more formally how D code is parsed. I 
had a quick look at the D parsing code. It seems that following 
an initial parse - presumably this constructs the syntax tree - 
there are three deferred semantic parses. Are any details 
available on what actually happens in each pass? I can read the 
code of course but it would be helpful to get a high level 
picture.

Thanks and Regards
Dibyendu