| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, Corey Huinker <corey(dot)huinker(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Joe Conway <mail(at)joeconway(dot)com>, Nikita Glukhov <n(dot)gluhov(at)postgrespro(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Error-safe user functions |
| Date: | 2022-12-08 21:58:36 |
| Message-ID: | 20221208215836.3naznqmal2m32hzc@awork3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2022-12-08 16:00:10 -0500, Robert Haas wrote:
> On Thu, Dec 8, 2022 at 11:32 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)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
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