Re: 4 beginner's questions on the PL Ada

[Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>]

On 08/09/2013 02:38 PM, Emanuel Berg wrote:
>
> Yes! This works great:
>
> with Ada.Task_Identification;
> use  Ada.Task_Identification;
>
> Task_Name : constant String := Image(Current_Task);
>
> It produces output like
>
> add_one_081838Dt
>
> if the task is referred to as Add_One in the code.

Not necessarily. First, this is only available in compilers that choose to 
implement the optional Annex C, Systems Programming, so this is non-portable. 
Second, the contents of the string returned by Image are implementation defined. 
One particular compiler uses the task name as part of the returned value, but 
others might not, so adding another layer of non-portability.

This may not be a concern for your present needs, though unnecessary 
non-portability usually bites you sooner or later in real projects. An advantage 
of the technique used in PragmARC.Reflection is that it is part of the core 
language, and so implemented by all compilers, and the resulting string is 
defined by the language, and so is the same for all compilers.

-- 
Jeff Carter
"Well, a gala day is enough for me. I don't think
I can handle any more."
Duck Soup
93