Inconsistent chain (implicitly converts to int)

[Salih Dincer]

On Friday, 5 April 2024 at 16:05:20 UTC, H. S. Teoh wrote:
> On Fri, Apr 05, 2024 at 03:18:09PM +0000, Salih Dincer via 
> Digitalmars-d-learn wrote:
>> Hi everyone,
>> 
>> Technically r1 and r2 are different types of range. Isn't it 
>> inconsistent to chain both? If not, why is the char type 
>> converted to int?
> [...]
>
> It's not inconsistent if there exists a common type that both 
> range element types implicit convert to.
>
> The real problem is the implicit conversion of char to int, 
> which I have been against for a long time.  Walter, however, 
> disagrees.
>
>
> T
```d
   auto a = [97, 98, 99];
   auto b = ['d', 'e', 'f'];

   a.chain(b).map!(chr => chr.to!char).writeln;
   // abcdef
```

Nice, there is a solution that requires memory allocation, but it 
still makes you think!

However, they can fix this in Phobos3 because now we have this 
too: 
https://dlang.org/changelog/2.108.0.html#range_predicate_element

PS. I think I unintentionally made a chain by repeating the 
source code above, sorry :)

SDB at 79