Re: Bitwise ops in RPG (was: Re: Determining *DS4 support)

[Jim Langston <jimlangston@xxxxxxxxxxxxxxxx>]

I prefer A) becomes I'm used to that format from other languages and
it's easier for me to read duel operators that way.

Would you even consider creating an %AND(x:y) built in function?

On a side note, BAND, BOR, BXOR and BNOT would be preferred.

Regards,

Jim Langston

boldt@ca.ibm.com wrote:
> 
> Jim wrote:
> >If you do create a bitwise AND please do not make the token 'AND' but
> >some other symbols, perhaps C's '&&'.  It gets very confusing when AND
> >is both bitwise and logical.  Code that looks like it should work either
> >doesn't or is intermittent, but it still compiles with AND as both bitwise
> >and logical.  Especially if you allow IF statements to become true on
> >non *zero values.  That's my biggest complaint with Basic.
> 
> But of course!  AND and OR should only ever refer to the logical
> operations.  Otherwise, severe ambiguities would result.
> 
> This begs the question:  What syntax would you prefer for bitwise
> operations?
> 
> a) infix operators:
>       x ANDB y
>       x ORB y
>       x XORB y
>       NOTB y
> 
>    (&& and || (like in C) are problematical for us since '|' is
>    not in the invariant EBCDIC code page.)
> 
> b) built-in functions:
>       %BITAND(x:y)
>       %BITOR(x:y)
>       %BITXOR(x:y)
>       %BITNOT(x)
> 
> Cheers!  Hans
> 
> Hans Boldt, ILE RPG Development, IBM Toronto Lab, boldt@ca.ibm.com
> 
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