[Patch, Fortran, 4.6] Coarray 6/n: Add expression support

[Tobias Burnus]

On March 20, 2010 18:29, Tobias Burnus wrote:
> here comes the next coarray patch, which finally brings support for
> coarrays in expression.
>   

Attached you find a new version, which corrects some issues.

 * * *

First, I managed to confuse "is" and "has" in "is/has an
allocatable/pointer ultimate component" ...

The "for PURE" reference is wrong, C1283 is somewhat different and
checked for at at different place.

gfc_variable_attr mishandled "allocatable" for coarrays, causing 
"alloc_var(:)[1] = ..." to be rejected.

And I forgot to to do a rank check for actual arguments to allocatable
coarray formal arguments.

 * * *

Hopefully, I have now found most of the bugs ...

Build and regtested on x86-64-linux.
OK for the 4.6 trunk?

(I included both an interdiff and the update of the previous patch as it
was not yet reviewed.)

Tobias

PS: By the way, there is a new version of g95, which is said to also
support coarray via threads, cf. http://www.g95.org/.
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