Early exit error messages are unsustainable

[Ethan]

On Wednesday, 14 August 2019 at 10:04:58 UTC, Sebastiaan Koppe 
wrote:
> On Wednesday, 14 August 2019 at 06:50:11 UTC, FeepingCreature 
> wrote:
>> especially around concepts like inspecting a type from a mixin 
>> template inside the type, and things like that.
>
> The first time I tried something similar like that, I thought 
> it will never compile. To my amazement it did. I still don't 
> fully understand how it works, but I am glad it does.

Yep, and I've been bitten before with mixins like that in 
Binderoo.

But this one. The only reason there was a circular import was to 
gain access to some struct UDAs.

In this case, I'd have to say "Even C can manage include 
guards/#pragma once".