Is there any reasons to not use "mmap" to read files?

[rempas]

On Sunday, 6 February 2022 at 20:48:09 UTC, IGotD- wrote:
> Phobos/druntime is like an #ifdef hell but with version instead.

Actually, I personally tried to read some files (like stdio.d and 
conv.d) and while I didn't found them super user friendly, they 
are WAY more clear and easy to read then GLIB! I don't know if 
every libc's header files are like that in every OS and also I'm 
super super n00b when it comes to reading other people's source 
code so maybe H. S. Teoh is just better at us at reading code, 
idk...