(j3.2006) [Fwd: RE: Ada's Fortran interoperability AI]

[Steve Lionel]

I think this document is taking the wrong approach. Instead it should 
build on the C interop features. Indeed, if Ada can "look like C", then 
the Fortran standard C interop features can be used.

I am especially troubled by the notion that an Ada and a Fortran 
implementation should "conspire" to support a shared interface for 
arrays, allocatables and such. We already have that in F2015 and several 
implementations of the C interop stuff exist.

The stuff about kinds should instead refer to C types the way C interop 
does.

Most important, any Fortran routine called by Ada must be interoperable 
(and any Ada procedure called by Fortran must be interoperable), so that 
one doesn't get into implementation specifics such as hidden arguments, 
calling mechanisms and name decoration.

I assume Ada has a C interoperability specification. That should be 
usable with Fortran along with some guidance for the programmer.

Steve

On 2/21/2017 8:08 PM, Van Snyder wrote:
> I mentioned at J3 meeting 212 that there is a proposal to amend Ada's
> annex concerning Fortran interoperability to be compatible with Fortran
> 2008, not to recommend things that were never part of any Fortran
> standard, and not to recommend things that are processor dependent or
> dependent upon processor command-line options used when compiling a
> Fortran program.
>
> This resulted in generation of what WG9 calles an "AI" or "Ada Issue."
>
> Dan asked me to forward the AI.
>
> I asked Randy Brukardt, a denizen of WG9, to send it to me.
>
> It's attached.  From my perspective, it looks quite good.  Let me (or
> Randy) know if you have comments on it.
>
> Van
>
> -------- Forwarded Message --------
> From: Randy Brukardt <randy at rrsoftware.com>
> Reply-to: <randy at rrsoftware.com>
> To: Van.Snyder at jpl.nasa.gov
> Subject: RE: Fortran interoperability AI
> Date: Tue, 21 Feb 2017 16:07:14 -0600
>
> You can always get these out of our database (see
> http://www.ada-auth.org/AI12-SUMMARY.HTML, looking for Fortran will find it
> more quickly than asking me). I've attached the most recent version.
>
>                   Randy.
>
>> -----Original Message-----
>> From: Van Snyder [mailto:Van.Snyder at jpl.nasa.gov]
>> Sent: Tuesday, February 21, 2017 3:55 PM
>> To: randy at rrsoftware.com
>> Subject: RE: Fortran interoperability AI
>>
>> Randy:
>>
>> Can you send me a copy of the AI?  The Fortran committee
>> asked me for it when I mentioned it in my liaison report last week.
>>
>> Thanks,
>> Van
>
>
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