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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: on allowing "int a" definition everywhere
Date: Wed, 28 Aug 2024 08:37:35 -0700
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Ben Bacarisse <ben@bsb.me.uk> writes:

> Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:
>
>> Tim Rentsch <tr.17687@z991.linuxsc.com> writes:
>> [...]
>>
>>> Not exactly.  There are things that can be done inside a
>>> statement-expression that are not available inside nested
>>> functions or lambdas.
>>
>> And you're not going to tell us what those things are.
>
> Apparently not.
>
> But one thing occurs to me... you can break (or jump) out of a statement
> expression:
>
>   for (int i = 0; i < 10; i++)
>       printf("%d\n", ({ if (i > 5) break;  i; }));
>
> You can't do this with a lambda or nested function.

Right.  More generally, control transfers to outside the scope of
a statement-expression are allowed.  That includes break, continue,
goto, and importantly return, which returns from the function
containing the statement-expression.