Re: How to put main procedure in SPARK_Mode?

[mockturtle <framefritti@gmail.com>]

On Tuesday, May 21, 2019 at 4:14:44 PM UTC+2, Simon Wright wrote:
> mockturtle <framefritti@gmail.com> writes:
> 
> > I am fooling around with SPARK (I always wanted to learn to use it)
> > and I want to put the "main" procedure (that is in a body file of its
> > own) in SPARK_Mode, but with no success so far.
> >
> > I tried many things including (but not limited to :-))
> >  
> > * Using Pragma SPARK_Mode (with and without "On") at the beginning of
> >   the file
> >
> > * Using Pragma SPARK_MODE after the "is" 
> >
> > * Using 
> >   procedure Main with SPARK_Mode => is ....
> >
> > and other variations that I do not remember.
> >
> > The only way I was able to put the procedure in SPARK mode is by
> > putting it into a package, but in this way it cannot be the "main"
> > (right?).  I solved the problem by having a microscopic main procedure
> > whose only action is to call the true main in the package, but it
> > seems to me less than ideal...
> >
> > Any suggestions?
> 
> I just tried
> 
>    project Spark_Main is
>       for Source_Files use ("spark_main.adb");
>    end Spark_Main;
> 
> and
> 
>    procedure Spark_Main with SPARK_Mode is
>    begin
>       null;
>    end Spark_Main;
> 
> and it worked OK.

I know it sounds crazy, but I am pretty sure I tried this too...

There is maybe a difference... I do not know if it is important, but in my setup the main procedure is a child of a "big root package" (this is a setup that I usually find convenient).  Could this be the difference?  I'll try later.