Re: Problem with SMG!!!!

["Theodore E. Dennison" <dennison@escmail.mmc.orl.com>]

adam@irvine.com (Adam Beneschan) wrote:
> "Theodore E. Dennison" <dennison@escmail.mmc.orl.com> writes:
> > Unless I'm missing something, when you do screen I/O's with SMG, you
> > need to do ALL your screen I/Os with SMG. In other words, you need to
> > use the SMG output routines. Forget about Text_IO.
> > 
> Hmmm . . . I've been using SMG$ routines for keyboard input and the
> regular SYS$QIOW routines for output, and I've never had a problem.
> In other words, there seems to be nothing in VMS that requires that
> you use SMG$ for output if you're using it for input.
> 
> VAX Ada may be a different story, however.  If TEXT_IO.PUT routines

If I remember correctly, TEXT_IO operations are mapped directly to
RMS$ routines, not to SYS$QIO routines. I also remember that mixing
Text_IO.Put* routines with SMG$ tended to cause problems. SMG$ 
provides its own text input and output routines, so why not use them?
If you "mix-and-match" your I/O routines, you are asking for trouble.

To put this in OO terms: Text_IO is an abstraction for user I/O. SMG 
is a different abstraction for user I/O. Pick one abstraction, and 
stick with it.

T.E.D.