Re: forward declaration in c

On Mon, May 25, 2009 at 01:20:05PM +0200, Pavel Stehule wrote:
> Hello
>
> I can't to find fine syntax for cyclic declaration:

If you mean forward declaraions of a type, just:

struct ParseState

will do, then:

> typedef Node *(*TransformColumnRef_hook_type) (struct ParseState *pstate,
> ColumnRef *cref);

With the "struct" keyword added.

> with empty declaration typedef struct ParseState;

It might work with:

typedef struct ParseState ParseState;

But then you can't use typedef in the actual declaraion (AFAIK you can
only forward declare structs, enums and such, but not typedefs).

Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Please line up in a tree and maintain the heap invariant while
> boarding. Thank you for flying nlogn airlines.