[Patch, Fortran] IMPLICIT fixes

[Steve Kargl]

On Thu, Oct 09, 2014 at 10:27:09PM +0200, Tobias Burnus wrote:
> 
> this patch fixes Alan's issue with IMPLICIT followed by ";". I am not 
> sure whether using the _eos machinery is really needed ??? especially as 
> "!" seem to be already handled.
> 
> Additionally, I missed the inner "[...]" for the new:
> 
> R563 implicit-stmt  is  IMPLICIT implicit-spec-list
>                      or  IMPLICIT NONE [ ( [ implicit-none-spec-list ] ) ]
> 
> 
> Namely,  "IMPLICIT NONE ()" is also valid - but was rejected before. As 
> implicit-none-spec implies type,* that's now also handled.
> (* "An IMPLICIT statement specifies the mapping for the letters in its 
> letter-spec-list. IMPLICIT NONE with an implicit-none-spec of TYPE or 
> with no implicit-none-spec-list specifies the null mapping for all the 
> letters.")
> 
> And finally, Dominque correctly observed that the location of some of 
> the error messages was rather off, e.g. if there was a long comment 
> following the actual statement. Hence, I have modified the code to 
> provide a better error message.
> 
> Build and regtested on x86-64-gnu-linux.
> OK for the trunk?
> 

Looks ok to me.

-- 
Steve