Operator declaration

[Nick Treleaven]

On Friday, 24 April 2026 at 09:49:31 UTC, Dom Disc wrote:
> On Thursday, 23 April 2026 at 15:25:35 UTC, H. S. Teoh wrote:
>
>> I hate D's policy on integer conversions.
>
> The funny fact is: during CTFE this promotion to int is NOT 
> done.
>
> for(ubyte i = 0; i<256; ++i) ...

Can we make `i < 256` a compile-time error?

> This works, because i is promoted to int so it can an will 
> reach 256.
>
> But during CTFE this is an infinite loop, because an ubyte is 
> always <256
>
> One of the bugs that caught me on surprise.

It's an infinite loop at runtime. `i == 256` never happens, it 
can't.

```d
void main()
{
     import std.stdio;
     for(ubyte i = 0; i<256; ++i)
         i.writeln;
}
```