Rant after trying Rust a bit

[Max Samukha via Digitalmars-d]

On Wednesday, 5 August 2015 at 15:58:28 UTC, Timon Gehr wrote:

>> The point is that '+' for string concatenation is no more of 
>> an 'idiot
>> thing' than '~'.
>
> My point is that it is. String concatenation is not commutative.

Ok, good point. Except that '+' in a programming language is not 
the mathematical '+'. Why define '+' as strictly commutative 
operation and not more generally as an abstract binary operation, 
considering the middle dot is unavailable? Or, if we want to 
stick to the math notation, then '*' would be more appropriate 
than the idiot thing '~'.