Is the Ada compiler of Polyspace invalid?

Is the Ada compiler of Polyspace invalid?

[Julian Leyh]

Hi,

I have some Ada code, which I would like to try Polyspace on.

It contains something like this (simplified):

foo.ads:
procedure foo;

foo.adb:
procedure foo is
...
end foo;

somewhere else:
with foo;
...
foo;
...

The Polyspace compiler doesn't seem to like this..

In my understanding, the above should be completely valid Ada code -
even should have been valid Ada83 code (I use Ada95 standard for my
project).

Is the Polyspace compiler wrong? That would mean, it is no valid Ada
compiler.. Or is there a way to make Polyspace understand it?

Greetings,
Julian

Re: Is the Ada compiler of Polyspace invalid?

[Martin]

On Feb 18, 8:58 am, Julian Leyh <jul...@vgai.de> wrote:
> Hi,
>
> I have some Ada code, which I would like to try Polyspace on.
>
> It contains something like this (simplified):
>
> foo.ads:
> procedure foo;
>
> foo.adb:
> procedure foo is
> ...
> end foo;
>
> somewhere else:
> with foo;
> ...
> foo;
> ...
>
> The Polyspace compiler doesn't seem to like this..
>
> In my understanding, the above should be completely valid Ada code -
> even should have been valid Ada83 code (I use Ada95 standard for my
> project).
>
> Is the Polyspace compiler wrong? That would mean, it is no valid Ada
> compiler.. Or is there a way to make Polyspace understand it?
>
> Greetings,
> Julian

What's the error you're seeing? also what folders/files are visible in
your polyspace project?...

-- Martin

Re: Is the Ada compiler of Polyspace invalid?

[Paul Colin Gloster]

Julian Leyh <julian@VGAI.De> sent on February 18th, 2011:
|-------------------------------------------------------------|
|"Hi,                                                         |
|                                                             |
|I have some Ada code, which I would like to try Polyspace on.|
|                                                             |
|It contains something like this (simplified):                |
|                                                             |
|foo.ads:                                                     |
|procedure foo;                                               |
|                                                             |
|foo.adb:                                                     |
|procedure foo is                                             |
|...                                                          |
|end foo;                                                     |
|                                                             |
|somewhere else:                                              |
|with foo;"                                                   |
|-------------------------------------------------------------|

Hi,

Do you really have something like that? You cannot WITH a procedure.

|-------------------------------------------------------------|
|"[..]                                                        |
|                                                             |
|The Polyspace compiler doesn't seem to like this..           |
|                                                             |
|[..]"                                                        |
|-------------------------------------------------------------|

The code checkers from Polyspace are not compilers.

Yours sincerely,
Paul Colin Gloster

Re: Is the Ada compiler of Polyspace invalid?

[Simon Wright]

Paul Colin Gloster <Colin_Paul_Gloster@ACM.org> writes:

> Julian Leyh <julian@VGAI.De> sent on February 18th, 2011:
> |-------------------------------------------------------------|
> |"Hi,                                                         |
> |                                                             |
> |I have some Ada code, which I would like to try Polyspace on.|
> |                                                             |
> |It contains something like this (simplified):                |
> |                                                             |
> |foo.ads:                                                     |
> |procedure foo;                                               |
> |                                                             |
> |foo.adb:                                                     |
> |procedure foo is                                             |
> |...                                                          |
> |end foo;                                                     |
> |                                                             |
> |somewhere else:                                              |
> |with foo;"                                                   |
> |-------------------------------------------------------------|
>
> Hi,
>
> Do you really have something like that? You cannot WITH a procedure.

Yes you can.

ARM 10.1.1(6)
[http://www.adaic.org/resources/add_content/standards/05rm/html/RM-10-1-1.html]
includes subprogram_declaration in library_declaration.

I assure you that this works!

Re: Is the Ada compiler of Polyspace invalid?

[Adam Beneschan]

On Feb 18, 8:27 am, Paul Colin Gloster <Colin_Paul_Glos...@ACM.org>
wrote:
> Julian Leyh <jul...@VGAI.De> sent on February 18th, 2011:
> |-------------------------------------------------------------|
> |"Hi,                                                         |
> |                                                             |
> |I have some Ada code, which I would like to try Polyspace on.|
> |                                                             |
> |It contains something like this (simplified):                |
> |                                                             |
> |foo.ads:                                                     |
> |procedure foo;                                               |
> |                                                             |
> |foo.adb:                                                     |
> |procedure foo is                                             |
> |...                                                          |
> |end foo;                                                     |
> |                                                             |
> |somewhere else:                                              |
> |with foo;"                                                   |
> |-------------------------------------------------------------|
>
> Hi,
>
> Do you really have something like that? You cannot WITH a procedure.

Yes, you can, if it's a library unit.

                       -- Adam

Re: Is the Ada compiler of Polyspace invalid?

[Adam Beneschan]

On Feb 18, 12:58 am, Julian Leyh <jul...@vgai.de> wrote:
> Hi,
>
> I have some Ada code, which I would like to try Polyspace on.
>
> It contains something like this (simplified):
>
> foo.ads:
> procedure foo;
>
> foo.adb:
> procedure foo is
> ...
> end foo;
>
> somewhere else:
> with foo;
> ...
> foo;
> ...
>
> The Polyspace compiler doesn't seem to like this..

I don't know anything about Polyspace.  But a couple things come to
mind:

(a) In order to say "with foo;", foo has to be a library unit, and it
has to be in the library.  The language does not define what the
"library" is or how units get entered into it.  How this happens
varies between compiler vendors.  I believe that with GNAT, the mere
presence of foo.ads would be enough to tell the compiler that the unit
"foo" is in the library.  With other compilers, though, you have to
take other steps (such as running a command that compiles foo.ads).
You'll have to check the documentation.

(b) Even if "foo" is in the library, there may be another identifier
named "foo" that is visible at the point where you call it, which can
lead to the library unit being hidden or to the call being ambiguous.
You'd need to tell us just what errors you're getting for the rest of
us to help with this.

                                 -- Adam

Re: Is the Ada compiler of Polyspace invalid?

[Martin]

On Feb 18, 4:27 pm, Paul Colin Gloster <Colin_Paul_Glos...@ACM.org>
wrote:
> The code checkers from Polyspace are not compilers.


But they do contain the front-end of a compiler for the language they
support. For one, they need to translate the code into their own
internal representation.

-- Martin
Polyspace user for many-a-year

Re: Is the Ada compiler of Polyspace invalid?

[Paul Colin Gloster]

Simon Wright <simon@pushface.org> sent on February 18th, 2011:
|----------------------------------------------------------------------|
|"Paul Colin Gloster <Colin_Paul_Gloster@ACM.org> writes:              |
|                                                                      |
|[..]                                                                  |
|> Do you really have something like that? You cannot WITH a procedure.|
|                                                                      |
|Yes you can.                                                          |
|                                                                      |
|[..]"                                                                 |
|----------------------------------------------------------------------|

I was mistaken. Sorry.

Re: Is the Ada compiler of Polyspace invalid?

[Julian Leyh]

On 18 Feb., 10:40, Martin <martin.do...@btopenworld.com> wrote:
> On Feb 18, 8:58 am, Julian Leyh <jul...@vgai.de> wrote:
>
>
>
> > Hi,
>
> > I have some Ada code, which I would like to try Polyspace on.
>
> > It contains something like this (simplified):
>
> > foo.ads:
> > procedure foo;
>
> > foo.adb:
> > procedure foo is
> > ...
> > end foo;
>
> > somewhere else:
> > with foo;
> > ...
> > foo;
> > ...
>
> > The Polyspace compiler doesn't seem to like this..
>
> > In my understanding, the above should be completely valid Ada code -
> > even should have been valid Ada83 code (I use Ada95 standard for my
> > project).
>
> > Is the Polyspace compiler wrong? That would mean, it is no valid Ada
> > compiler.. Or is there a way to make Polyspace understand it?
>
> > Greetings,
> > Julian
>
> What's the error you're seeing? also what folders/files are visible in
> your polyspace project?...
>
> -- Martin

The error is:

Error: procedure or entry name expected.

Re: Is the Ada compiler of Polyspace invalid?

[Adam Beneschan]

On Feb 21, 12:32 am, Julian Leyh <jul...@vgai.de> wrote:
> On 18 Feb., 10:40, Martin <martin.do...@btopenworld.com> wrote:
>
>
>
>
>
> > On Feb 18, 8:58 am, Julian Leyh <jul...@vgai.de> wrote:
>
> > > Hi,
>
> > > I have some Ada code, which I would like to try Polyspace on.
>
> > > It contains something like this (simplified):
>
> > > foo.ads:
> > > procedure foo;
>
> > > foo.adb:
> > > procedure foo is
> > > ...
> > > end foo;
>
> > > somewhere else:
> > > with foo;
> > > ...
> > > foo;
> > > ...
>
> > > The Polyspace compiler doesn't seem to like this..
>
> > > In my understanding, the above should be completely valid Ada code -
> > > even should have been valid Ada83 code (I use Ada95 standard for my
> > > project).
>
> > > Is the Polyspace compiler wrong? That would mean, it is no valid Ada
> > > compiler.. Or is there a way to make Polyspace understand it?
>
> > > Greetings,
> > > Julian
>
> > What's the error you're seeing? also what folders/files are visible in
> > your polyspace project?...
>
> > -- Martin
>
> The error is:
>
> Error: procedure or entry name expected.- Hide quoted text -

Are there other uses of the identifier "foo"?  Other uses that could
cause problems are "foo" being declared as something else or used as a
statement label or block or loop identifier in the same unit that's
calling foo.  If the unit is a package body, then a "foo" defined in
the specification could also cause problems.  Also, if the unit is a
child unit, a "foo" defined in the specification of the parent package
or any ancestor package can cause problems.  Finally, a "foo" defined
in the specification of any USE'd package can cause problems.
Depending on the circumstances, any of these could lead to a situation
where the library unit "foo" that got WITH'ed is hidden.

If the identifier really did get hidden, you can still call it by
referring to it as "standard.foo;"

                                 -- Adam