Please tell me this is a bug?

[Adam D. Ruppe via Digitalmars-d]

On Sunday, 22 February 2015 at 02:15:29 UTC, Almighty Bob wrote:
> what bothers me is any automatic conversion from float to int. 
> It should never be automatic.

Should 5.5 + 5 compile? I suppose it arguably shouldn't but 
that'd probably be pretty annoying and no information is lost - 
it can convert 5 (the int) to 5.0 (the float) and add it without 
dropping a part of the number.

But int = float would truncate the decimal and that's not cool.


You could argue this same logic ought to apply to a+=b and you'd 
have a point, but I think it is different because += happens in a 
single step: calculate in-place, rather than calculate the right 
hand side then assign to the left hand side. There's no 
intermediate to lose precision from, it is all done in that 
single step.

> "Assign Expressions:
> The right operand is implicitly converted to the type of the 
> left operand"
>
> which quite clearly is not the case since...
>
> a=b; // causes an error. but..

It tries to implicitly convert but can't.