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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 23:15:09 -0800
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learningcpp1@gmail.com (m137) writes:

> On Thu, 23 Jan 2025 1:05:25 +0000, James Kuyper wrote:
>
>> 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?  With it gone, I'm not sure it is
>> still considered an incomplete type.
>
> It seems to have been moved to N3047 6.2.5(25): "[...] A structure or
> union type of unknown content (as described in 6.7.2.3) is an incomplete
> type.  [...]"  (see here:
> https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3047.pdf#page=57).

That sentence isn't new in 6.2.5;  it's been there since before C11.