Re: [Swarm-Support] When did gcc get so lenient about the location of variable declarations?

[Paul Johnson]

Bill Northcott wrote:
> On 15/03/2005, at 4:13 AM, Paul Johnson wrote:
>
> > I need help with one piece of syntax.  Recall you can tell the 
> > compiler that a class exists, although it has not been presented yet, 
> > with the directive
> >
> > @class TheClassName
> >
> > IF you do that, then you can use (TheClassName *) as a return type and 
> > the compiler does not bother you.
> >
> > What is the equivalent declaration for a protocol?
>
>
>  From the Objective-C language manual syntax definitions:
>
>     protocol-declaration:
>     @protocol protocol-name
>     [ protocol-reference-list ]
>     [ interface-declaration-list ]
>     @end
>
>     protocol-declaration-list:
>     @protocol < protocol-list  > ;
>
>     class-declaration-list:
>     @class class-list ;
>
> Which is hopefully self-explanatory.  So I guess you need:
> @protocol < SomeProtocol SomeOtherProtocol >;
I got inspired and tried that. Here's the compiler error:

In file included from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/../defobj/DefObject.h:27,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/../defobj/Customize.h:27,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/../defobj/Create.h:26,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/../defobj/Archiver.h:20,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/Archiver.m:20:
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/defobj.h:85: 
error: syntax error before '<' token
In file included from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/defobj.h:1431,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/../defobj/DefObject.h:27,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/../defobj/Customize.h:27,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/../defobj/Create.h:26,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/../defobj/Archiver.h:20,
                 from 
/home/pauljohn/LinuxDownloads/redhat/BUILD/swarm-2.2/src/defobj/Archiver.m:20:



So I tried with cutting out the <> brackets,

@protocol SomeOtherProtocol ;

and the error then changes to reject the eventual full declaration of 
the SomeOtherProtocol because it had already had a protocol declaration.


--
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ku.edu/~pauljohn
1541 Lilac Lane, Rm 504
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66044-3177           FAX: (785) 864-5700