[Bug fortran/34899] Continuation lines with <tab><number> not recognized

["kargl at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from kargl at gcc dot gnu dot org  2008-01-21 19:24 -------
(In reply to comment #3)
> 
> Sorry, no!  The code is non-conforming.  The code should be fixed.
> 

I downloaded the FITS package, and it's worse than I thought.  Please
don't unfix gfortran.  This is valid fixed-form Fortran.

c23456789012345678901234567890123456789012345678901234567890123456789012
      program a
      integer aaaaaaaaaaaa, bbbbbbbbb, cccccccc, dddddddddd, eeeeeeee, f
     1gggg
      fgggg = 1
      print *, fgggg
      end program a

If I understand correctly, you want to change gfortran to parse a leading
tab as 5 spaces if it is followed by digit; otherwise, the leading tab is
parsed as 6 spaces.  OK, change the above program by replacing the 1 in
column 5 to 'd'.  This is again a valid fixed-form code.  Now, replace the
leading spaces with a tab.  Do you expand the leading tab by 5 or 6 spaces?

Seriously, the FITS code is invalid.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34899