[Issue 10129] New: problem with short numbers operator

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10129

           Summary: problem with short numbers operator
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: udefranettet at gmail.com


--- Comment #0 from cbr <udefranettet at gmail.com> 2013-05-21 12:11:12 PDT ---
Created an attachment (id=1215)
compile error for small number types

I would expect that it is allow to use the operator + and -.
on byte,ubyte,short and ushort numbers by dmd (and gdc) convert those to an
int.

The attach example gives the following complier error.
short_int_test.d(8): Error: cannot implicitly convert expression (cast(int)n +
cast(int)k) of type int to ubyte

When the Num alias is ubyte,byte,ushort and short.

So if we what to use those type we have to cast to an int isn't this a little
overkill.

So instead of 

 r=n+k;
We have to write.
 r=cast(Num)(n+k);
Where r,n,k is the to of Num.

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