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From: Adam Beneschan <adam@irvine.com>
Newsgroups: comp.lang.ada
Subject: Re: Defaulting to Standard_Output
Date: Thu, 23 Oct 2008 18:49:14 -0700 (PDT)
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Date: 2008-10-23T18:49:14-07:00
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On Oct 23, 6:14 pm, deadlyhead <deadlyh...@gmail.com> wrote:
> On Oct 23, 5:16 pm, "Jeffrey R. Carter"
>
> <spam.jrcarter....@spam.acm.org> wrote:
> > deadlyhead wrote:
>
> > > If anybody has a better way of handling defaulting to Standard_Output,
> > > I'd like to see it.  This works for me, and seems elegant enough.  It
> > > avoids a lot of messy conditionals in the body, anyway.
>
> > This is what Ada.Text_IO.Set_Output is for.

> I looked over Set_Output in the ARM and I went back looking for it in
> the comp.lang.ada, and it looks to me that Set_Output will direct all
> Put statements to Outfile if a file isn't designated, rather than
> having calls of Put (Outfile, Item) appear in Standard_Output.
>
> This doesn't appear to be the functionality I'm looking for.  If no
> file is specifically named for Outfile, I want all output to appear on
> the terminal.  If a file is named for Outfile, then direct output to
> that.  Using Set_Output (Outfile), wouldn't I still need a Create
> statement for Outfile?

Well, yes.  If you want to create a file, you need to call Create.
There isn't anything in the Ada libraries that I know of that will
create a file without you telling it to.  But why would that be a
problem?  If Name /= "", call Create, then call Set_Output.

                              -- Adam