[Dlang-internal] Functional techniques in dmd

[Stefan Koch]

On Thursday, 12 July 2018 at 23:58:23 UTC, Walter Bright wrote:
> https://github.com/dlang/dmd/pull/8493
>
> It's a small change, but it illustrates an important concept - 
> separating code into functions that calculate things (which can 
> be made pure) and functions that modify state.
>
> Doing this more generally will significantly reduce the 
> cognitive complexity of the compiler.

It obvious that the compilation-process is in essence a pure 
function mapping source_code to machine_code.

Therefore this is theoretically applicable to most of the 
compiler.