Looking for some thoughtful review of my first D program

[Thomas Teixeira]

Hi, you all !

I've wanted to look at D for the last two years, being a C fanboy 
and not fond of C++.
It seemed like a good alternative between some delightful extra 
new stuff and keeping C-like experience : performances and code 
style wise.

I wrote my first CLI program this weekend and would like some 
code review, if some of you don't mind. :)
The source code can be found here : 
https://git.sr.ht/~nasmevka/tmp/tree/main/item/tmp.d

I apologize for the way my code looks like. I do not use LSPs and 
having function definition's name on their own line make `grep 
^funcname` really powerful.

Templates are really powerful, and I feel like I do not use them 
near enough ? 🤷


Open to all form of criticism ☺️