Re: Improve node type forward reference

On 14.10.24 23:28, Nathan Bossart wrote:
> On Mon, Oct 14, 2024 at 09:47:59AM +0200, Peter Eisentraut wrote:
>> But we can do this better by using an incomplete struct, like
>>
>>          struct Query *viewQuery ...;
>>
>> That way, everything has the correct type and fewer casts are required. This
>> technique is already used elsewhere in node type definitions.
> 
> I noticed that the examples in parsenodes.h are for structs defined within
> the same file.  If the struct is defined in a separate file, I guess you
> might need to include another header file wherever it is used, but that
> doesn't seem too bad.

No, you can leave the struct incomplete.  You only need to provide its 
full definition (= include the other header file) if you actually want 
to access the struct's fields.