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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: Struct Error
Date: Wed, 22 Jan 2025 23:31:31 -0800
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James Kuyper <jameskuyper@alumni.caltech.edu> writes:

> On 2025-01-22, bart <bc@freeuk.com> wrote:
>
>> Gcc 14.1 gives me an error compiling this code:
>>
>>    struct vector;
>>    struct scenet;
>>
>>    struct vector {
>>        double x;
>>        double y;
>>        double z;
>>    };
>>
>>    struct scenet {
>>        struct vector center;
>>        double radius;
>>        struct scenet (*child)[];
>>    };
>
> 6.7.6.2p2:  "The element type shall not be an incomplete or function type."
>
> I have many draft versions of the C standard.  n2912.pdf, dated
> 2022-06-08, says in 6.7.2.1.p3 about struct types that "... the type is
> incomplete144) until immediately after the closing brace of the list
> defining the content, and complete thereafter."
>
> Therefore, struct scenet is not a complete type until the closing brace
> of it's declaration.
>
> However, that sentence disappeared in n3047.pdf, dated 2022-08-04.  Can
> anyone tell me why it was removed? [...]

That clause appears (slightly modified IIANM) in 6.7.2.3 p5.