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From: schmidt@crimee.ics.uci.edu (Doug Schmidt)
Newsgroups: gnu.g++.bug
Subject: Re: Apparent bug in G++ 1.32.0 - error message no issued
Message-ID: <4942@paris.ics.uci.edu>
Date: 21 Jan 89 01:04:18 GMT
References: <8901202252.AA10430@riunite.aca.mcc.com>
Sender: news@paris.ics.uci.edu
Reply-To: Doug Schmidt <schmidt@crimee.ics.uci.edu>
Distribution: gnu
Organization: University of California, Irvine - Dept of ICS
Lines: 63

In article <8901202252.AA10430@riunite.aca.mcc.com> rfg@MCC.COM (Ron Guilmette) writes:
>
>I'm not sure if this is a bug in G++ (1.32.0), a bug in the language
>definition itself, or just a strange feature, but here goes.  Consider
>the following code:
>
>////////////////////////////////////////////////////////////////////////////
>class first_class;
>
>class second_class {
>public:
>	first_class some_function ();
>}
>
>another_function ()
>{
>	second_class second_class_object;
>
>	second_class_object.some_function ();
>}
>Any comments?  Could somebody please see what AT&T cfront does with this.
>

cfront screws up also, here's the diagnostics from 1.2.1:

----------------------------------------
CC  foo.c:
"foo.c", line 13: warning:  second_class_object used but not set
"foo.c", line 13: warning: no value returned from another_function()
cc    foo.c..c /cd/ua/schmidt/lib/sun4/mylib.a /cd/ua/schmidt/lib/sun4/strlib.a -lC
"foo.c", line 12: undefined structure or union
mv: foo.c..o: Cannot access: No such file or directory
----------------------------------------

The last error is propagated through to the C compiler!  Here's a
portion of the generated C source code:

----------------------------------------
"foo.c", line 13: warning:  second_class_object used but not set
"foo.c", line 13: warning: no value returned from another_function()

struct second_class {	/* sizeof second_class == 2 */
   char _dummy; 
};

struct first_class _second_class_some_function ();

int another_function ()
{ 
struct second_class _au1_second_class_object ;

_second_class_some_function ( & _au1_second_class_object ) ;
}
;

----------------------------------------

Doug
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