[PATCH, Fortran] Four small DEC extensions

[Jim MacArthur]

On 12/10/16 13:30, Fritz Reese wrote:
> Here I submit for review four small extensions to the GNU Fortran
> frontend for compatibility with legacy code. I figure it might be a
> nice change of pace from my larger patches. Never fear, for I have
> more large patches to come, which I will continue to submit
> one-at-a-time.
>
> Each extension is enabled with its own compile flag, and each are
> enabled along with -fdec. They are fairly self-explanatory.
>
> 1. [-fdec-feed] Treat form feed characters as whitespace.
> 2. [-fdec-type-print] Treat TYPE as an alias for PRINT where applicable.
> 3. [-fdec-loc-rval] Allow %LOC() as an rvalue, equivalent to using the
> LOC() intrinsic.
> 4. [-fdec-logical-xor] Enable .XOR. as a logical operator.
>
> Feel free to comment on/question/approve each patch individually as
> desired. They are attached as sequential patch files for ease of
> review. Bootstraps & regtests on x86_64-redhat-
> linux. OK for trunk?
>
> ---
> Fritz Reese
>

I'm not in a position to approve of these patches but the .XOR. one is 
very similar to one we've had in a private branch for a while so I'd be 
very happy to see that in trunk.

The TYPE as PRINT problem is one we managed to fix by automatic 
replacement in the source code. It's not quite as simple as sed, because 
replacing TYPE with PRINT pushes some lines over 72 characters. Our tool 
to do this - not a particularly polished one - is at 
https://github.com/CodethinkLabs/fortrantools/blob/master/type-to-print.py 
in case that's of use to anyone. No objections to your patch being added 
to trunk, of course.

Jim