Wireshark · Wireshark-dev: Re: [Wireshark-dev] [Wireshark-commits] rev 29176: /trunk/epan/ /trunk/epan/dfilter/: dfilter.h /tru

[Jakub Zawadzki <darkjames@xxxxxxxxxxxxxxxx>]

On Thu, Jul 23, 2009 at 12:17:54PM +0200, Kovarththanan Rajaratnam wrote:
> It seems that there are some circular dependencies in the header files. 
> Could you try this patch? It moves the dfilter forward declaration to a 
> new file, dfilter-fwd.h
> 
> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=3387
> 
> Note: I've only tested this on MSVC.

You can't typedef again, even if you use it without includes, in single file like:

typedef struct fook fook_t;
typedef struct fook { 
	int a;
} fook_t;

it will generates error:
	foo.c:7: error: redefinition of typedef 'bar_t'
	foo.c:1: error: previous declaration of 'bar_t' was here

but you can do:
	struct bar;	/* forward, just in case? */

	struct foo {
	        struct bar *baz;
	};

	typedef struct bar {
	        int field1;
	} baz_t;