[Bug libfortran/18879] ? not supported in namelist input

["paulthomas2 at wanadoo dot fr" <gcc-bugzilla@gcc.gnu.org>]

------- Additional Comments From paulthomas2 at wanadoo dot fr  2005-03-13 17:59 -------
(In reply to comment #2)
This is indeed and extension.

See http://h18009.www1.hp.com/fortran/docs/lrm/lrm0372.htm#nm_in for the 
Digital/Compaq/HP specification

> (In reply to comment #1)
> > Is this a language extension? Seems likely, as the standard has no concept 
of
> > stdin  and stdout. Could you point to someplace where this extension is 
specified?
> It's in the comments to io.h (line 76 ff):
>   Even more complex, during the execution of a program containing a
>   namelist READ statement, you can specify a question mark character(?)
>   or a question mark character preceded by an equal sign(=?) to get
>   the information of the namelist group. By '?', the name of variables
>   in the namelist will be displayed, by '=?', the name and value of
> Also, check out http://h18009.www1.hp.com/fortran/docs/lrm/lrm0372.htm .
> It's specified in green, which I suppose means that it is an extension.
> Googling for "namelist fortran question mark" will lead to other
> examples.
> Offhand, I can't find a UNIX compiler that doesn't support it.  g77 also
> tries, but the support there is buggy (see PR 18874).



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18879