OT (partially): about promotion of integers

[Walter Bright]

On 12/11/2012 10:36 AM, eles wrote:
> You really miss the point here. Nobody will ask you to promote those numbers to
> 64-bit or whatever *unless necessary*.

No, I don't miss the point. There are very few cases where the compiler could 
statically prove that something will fit in less than 32 bits.

Consider this:

   Integer foo(Integer i)
   {
     return i * 2;
   }

Tell me how many bits that should be.