[Bug fortran/56789] Handling of contiguous dummy arguments

[anlauf at gmx dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56789

--- Comment #18 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Paul Thomas from comment #12)
> (In reply to Harald Anlauf from comment #11)
> > (In reply to paul.richard.thomas@gmail.com from comment #10)
> > > Even if that were allowed, the standard explicitly disallows the
> > > argument association in the testcase: See 5.3.7 of the F2008 standard.
> > 
> > The wording has changed in F2018 DIS, 8.5.7, paragraph 1:
> > 
> > The CONTIGUOUS attribute specifies that an assumed-shape array is contiguous,
> > that an array pointer can only be pointer associated with a contiguous
> > target,
> > or that an assumed-rank dummy data object is contiguous.
> > 
> > 
> > In my interpretation, the testcase is valid under F2018, but invalid in
> > F2008.
> 
> Hmmm! The F2018 standard is almost obfusticating about argument association
> with contiguous dummies. I will wade through the pertinent sections tonight.
> 
> Paul

FWIW: Crayftn, Intel, PGI, NAG all accept the code without complaining and seem
to do the packing/unpacking.