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From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: Ada.Directories.Copy_File behavior
Date: Sun, 20 Feb 2011 20:19:02 +0000 (UTC)
Organization: Aioe.org NNTP Server
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Date: 2011-02-20T20:19:02+00:00
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> > The Windows CopyFile function takes a BOOL parameter bFailIfExists,
> > so is it implementation-defined what Ada.Directories.Copy_File does?
> > That's not very satisfactory.
>
> But I think it's imp-def even without that BOOL.
>
> In practise how many OS are you going to support? You may find that

No, it's how many *compilers* for a single OS are you going to support?


The behavior of Delete_File when the file is already gone, is specified,
so failing to specify the behavior for Copy_File looks like a
straight-forward oversight.

Regarding Delete_File, I wish they had included a "Make_Gone" that would
delete the file, or do nothing if it's already gone.  I prefer coding
to accomplish a certain end, rather than to execute a certain task.
It's also unpleasant to either litter code with
begin
  Ada.Directories.Delete_File(X);
exception
  when Ada.Directories.Name_Error => null;
end;
or to make my own
package My_Improved_Ada_Directories