[OT] The Usual Arithmetic Confusions

[Paul Backus]

On Thursday, 17 February 2022 at 17:53:58 UTC, bachmeier wrote:
> On Friday, 28 January 2022 at 02:15:51 UTC, Paul Backus wrote:
>> Unfortunately, this is also one of the areas of D that comes 
>> directly from C, so D programmers have to watch out for these 
>> as well.
>
> Here's a lovely one I wrote about yesterday in Learn:
>
> ```
> import std.conv, std.range, std.stdio;
>
> void main() {
> 	writeln(iota(5, 0, -1));
> 	writeln(iota(5, -1, -1));
> 	writeln(iota(5.to!uint, -1, -1));
> 	writeln(iota(5.to!uint, 0, -1));
> 	writeln(-1.to!uint);
> 	auto z = -1;
> 	writeln(z.to!uint);
> }
> ```

Yeah, implicit signed-to-unsigned conversion is really nasty. 
Even if we keep the rest of the C-style promotion rules, getting 
rid of that one would still be a big improvement.