[Bug libfortran/41711] [F2008] BOZ format does not support reading large kind reals

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

------- Comment #16 from kargl at gcc dot gnu dot org  2009-12-06 01:16 -------
(In reply to comment #15)
> (In reply to comment #14)
> > > According to a note I spotted on clf , reading and writing reals with BOZ is
> > > invalid, so what we are doing here is an extension. 
> > Do you have a pointer?
> 
> I have the following:
> 
> "10.6.1 Numeric editing"
> "The I, B, O, Z, F, E, EN, ES, D, and G edit descriptors may be used to specify
> the input/output of integer, real, and complex data."
> [...]
> "(6) On output, with I, B, O, Z, and F editing, the specified value of the
> field width w may be zero. In such cases, the processor selects the smallest
> positive actual field width that does not result in a field filled with
> asterisks. The specified value of w shall not be zero on input."
> 
> Thus it looks valid also for non-integers. However, going on one finds that the
> B, O, & Z edit descriptors are only mentioned in "10.6.1.1 Integer editing"
> whereas "10.6.1.2 Real and complex editing" starts with "The F, E, EN, ES, and
> D edit descriptors specify the editing of real and complex data. [...] The G
> edit descriptor also may be used to edit real and complex data."
> 
> Thus, combining the two, using BOZ edit descriptors is invalid in F95/F2003.
> 

I disagree with your conclusion that this is invalid. :-)

10.6.1 explicitly says that the BOZ descriptors may be used
for real and complex.  Yes, I understand that 10.6.1.2 does
not specify the BOZ details for real and complex; but, and
is a big but, it does not explicitly disallow BOZ descriptors.

Probably, time to submit an interpretation request.  I won't
have time until Sunday to pursue this.



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41711