[PATCH] Fortran -- Handle BOZ in accordance with F2008/2015.

[Jerry DeLisle]

On 10/06/2017 01:34 PM, Steve Kargl wrote:
> All,
> 
> I have spent the last few days trying to reconcile the various Fortran
> standards' requirements for handling BOZ.  The short story is that J3
> over the last 27 years has made incompatible changes to the interpretation
> of a BOZ (under some circumstances).  The interpretations in F2008 and
> F2015 now treat a boz-literal-constant as a sequence of bits.  Unfortunately,
> due to quirks in how BOZ are currently implemented in gfortran and a boat
> load of documented and undocumented extensions, bringing gfortran into 
> agreement with F2008/F2015 led to a rewrite of BOZ handling.  In the 
> rewrite I have made no attempt to use the -std= option to try to maintain
> the incompatibilities between standards.
> 

The patch tests OK on trunk with linux-x86_64. I suggest this be committed as is
and then see if there is any fallout that can be dealt with -std=legacy or
similar later.

Regards,

Jerry