Blog post on keeping D1 operators for D 2.100

[Steven Schveighoffer]

D 2.100.0 removed support for D1 operator overloads. If you have a bunch 
of code that still uses them, and don't want to spend the time to 
upgrade to D2 overloads, you can still do it, using a mixin.

Here's how it works (and shows off some cool metaprogramming features of 
D): 
https://www.schveiguy.com/blog/2022/06/how-to-keep-using-d1-operator-overloads/

-Steve