Re: Exception problem

[Larry Coon <larry@fs2.assist.uci.edu>]

David C. Hoos, Sr. wrote:
> 
> The problem is that when Text_IO.Data_Error is raised in this circumstance,
> the pointer in the input stream is backed up to where it was before the
> Int_IO.Get was called.  Therefore, if you want to skip over this
> non-numeric data in the input stream, you should call Text_IO.Skip_Line
> just after the line:
> Put_Line ("Entry must be a number.  Try again.");

Thanks.  Michael Feldman also pointed this out, and it worked like a
charm.
 
> Incidentally, Ada is much more civilized than C++.  We don't "throw"
> things.  Exceptions are simply "raised."

And apparently in Ada you're more sure of yourselves, because you don't
"try" things either!  ;-)

> One other point about your code.  Instantiations of generics (e.g.,
> Text_IO.Integer_IO) for commonly used types are better placed at the
> Library level, so all parts of your program can use the same instantiation.
>  Depending on the compiler/binder/linker used, code for multiple identical
> instantations may or may not share the code.

Oh, it was in the real code, but this was a contrived example to
demonstrate the problem.

Thanks for your response.

Larry Coon
University of California
larry@fs2.assist.uci.edu