[ace-users] Problem in the generation of stubs with forward declared interfaces.

[Douglas C. Schmidt]

Hi Stefano,

   Thanks very much for this bug report.  Jeff, can you please take a
look at this when you get back to the USA next week?

Thanks,

        Doug

>    ACE VERSION: 5.5.10
>
>   HOST MACHINE and OPERATING SYSTEM:
>      Dell, Windows XP
>
>   COMPILER NAME AND VERSION (AND PATCHLEVEL):
>      Visual Studio 2005 SP1, Visual C++ 8
>
>    THE $ACE_ROOT/ace/config.h FILE [if you use a link to a platform-
>    specific file, simply state which one]:
>       #if defined FD_SETSIZE
>       #	undef FD_SETSIZE
>       #endif
>       #define FD_SETSIZE 4096
>       #define ACE_HAS_STANDARD_CPP_LIBRARY 1
>       #include "ace/config-win32.h"
>
>    AREA/CLASS/EXAMPLE AFFECTED:
>     TAO_IDL
>
>    DOES THE PROBLEM AFFECT:
>        COMPILATION? Yes
>
>    SYNOPSIS:
>     Problem in the generation of stubs with forward declared
>interfaces referred in re-opened modules.
>
>    DESCRIPTION:
>
>      TAO_IDL generates wrong stubs when interfaces are forward
>declared in a module and referred in                    the same re-
>opened module, before the interface has been defined.
>
>    REPEAT BY:
>
>     Use the TAO_IDL compiler with this idl file:
>
>     // test.idl
>
>     module Test
>     {
>	     interface A;
>     };
>
>     module Test
>     {
>	     struct B
>        	{
>	        	A an_a;
>        	};
>     };
>
>     This generates among the other things:
>
>       return
>         Test::TAO::Objref_Traits<Test::A>::marshal (
>             _tao_aggregate.an_a.in (), strm);
>
>
>      The problem verifies also if the forward declaration is in
>another file, included in this one.
>
>    SAMPLE FIX/WORKAROUND:
>
>      Repeat the forward declaration in the re-opened module.
>
>
>Best regards,
>
>Stefano
>


-- 
Dr. Douglas C. Schmidt                       Professor and Associate Chair
Electrical Engineering and Computer Science  TEL: (615) 343-8197
Vanderbilt University                        WEB: www.dre.vanderbilt.edu/~schmidt
Nashville, TN 37203                          NET: d.schmidt at vanderbilt.edu