[Issue 1977] integral arithmetic operation only on int?

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1977


schveiguy at yahoo.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |




------- Comment #5 from schveiguy at yahoo.com  2008-11-22 08:44 -------
(In reply to comment #4)
> It's not ridiculous at all. The compiler cannot tell what values will be
> possibly passed to f, and the range of byte and short are sufficiently small to
> make overflow as frequent as it is confusing and undesirable.

Why is this also flagged (no overflow possible):

short f(byte i) {
  byte t = 1;
  short o = t - i;
  return o;
}

> The community has insisted for a long time to tighten integral operations, and
> now that it's happening, the tightening is reported as a bug :o).

But it's pretty inconsistent.  If I add two random ints together, I will get an
overflow in 25% of cases, why is that not flagged?

I think the restriction is too tight.  People expect to do math on homogeneous
types without having to cast the result, as they do with ints.  And I'll say I
was not one of the people asking for this 'feature'.  I'm not sure where that
came from.


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