Re: Ada.Command_Line.Argument_Count question

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Mon, 21 Sep 2009 16:09:21 +0100, John McCabe wrote:

> On Fri, 18 Sep 2009 18:16:15 -0400, Robert A Duff
> <bobduff@shell01.TheWorld.com> wrote:
> 
>>>>> Does Argument_Count() return 3 or 4? I haven't looked at this
>>>>> paragraph in detail, or what surrounds it, but "the number of
>>>>> arguments passed to the program invoking the function" sounds a bit
>>>>> vague. Is the "program invoking the function" the shell, or the
>>>>> program you're running?
> 
>>>>3.
> 
>>>>The program you're running.
> 
>>> For all implementations?
> 
>>For all reasonable implementations.  It is possible to create a
>>conforming Ada implementation that does something weird, because
>>the RM leaves all this implementation-defined.  It has to, because
>>we can't know about all operating systems.
> 
> Really? Surely the language here is providing a layer of abstraction
> from the operating system so it should be able to be definitive about
> whether the program name should be included in the argument count or
> the list of arguments in Ada.Command_Line?

Yes, but it certainly not as an argument of. If this functionality has to
be supported then as a set of separate functions, like:

Get_Image_Name (the file containing the program image),
Get_Install_Name (the name used to invoke the program),
Get_Command_Line (the user input caused execution of this instance),
Get_Instance_Count (number of instances running)

etc.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de