Strange implicit conversion integers on concatenation

[uranuz]

On Monday, 5 November 2018 at 15:58:40 UTC, Adam D. Ruppe wrote:
> On Monday, 5 November 2018 at 15:36:31 UTC, uranuz wrote:
>> I believe that following code shouldn't even compile, but it 
>> does and gives non-printable symbol appended at the end of 
>> string.
>
> Me too, this is a design flaw in the language. Following C's 
> example, int and char can convert to/from each other. So string 
> ~ int will convert int to char (as in reinterpret cast) and 
> append that.
>
> It is just the way it is, alas.

Ok. It's because string is array of char. And int could be 
implicitly converted to char if it fits the range.