...a blanket retry, a retry with tweaked parameters, a possible fallback, etc.

Using algebraic datatypes...

...returning the object via one of the parameters or using a compound type where you...

Good point about templates.

I just have a sense that there is some hidden simplicity...

I like this principle, that the compiler 'ensures' the author knows about
the interaction with...

It never occurred to anyone.

What do you have against overloading?

Breaking overloading would kill d, just unironically; how templates...

I wonder why overloading doesn't need an `overload` keyword at the site of an...

You may find something you could use here.
https://forum.dlang.org/post/shlldocweumneexbeuqx@forum...

I agree it is in conflict with overloading. But overloading and alias this are very...

It is apparent that it is overloading and `alias this` in its present form that...