How exactly does Tuple work?

[Adam D. Ruppe]

On Sunday, 8 November 2020 at 10:03:46 UTC, Jan Hönig wrote:
> Is there some recourse, which explains the `alias <something> 
> this`?

If your object is used in a way that doesn't compile, the 
compiler will change `obj` to `obj.whatever_alias_this_is` and 
try again.

So say you have

struct S {
     int a;
     alias a this;
}

S obj;

obj += 5;


It will see that obj +=5 doesn't compile on its own, but it has 
alias a this so it changes `obj` to `obj.a` and tries again.

So `obj.a += 5;` is the end result.