Re: Error-safe user functions

Hi,

On 2022-12-08 16:00:10 -0500, Robert Haas wrote:
> On Thu, Dec 8, 2022 at 11:32 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> > If we go with "struct Node *" then we can solve such problems by
> > just repeating "struct Node;" forward-declarations in as many
> > headers as we have to.
> 
> Yes, I think just putting "struct Node;" in as many places as
> necessary is the way to go. Or even:

+1


> struct Node;
> typedef struct Node Node;

That doesn't work well, because C99 doesn't allow typedefs to be redeclared in
the same scope. IIRC C11 added suppport for it, and a lot of compilers already
supported it before.

Greetings,

Andres Freund