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From: Dan Carpenter <error27@gmail.com>
To: linux-sparse@vger.kernel.org
Subject: declarations after a case statement
Date: Thu, 4 Jun 2026 16:40:44 +0300	[thread overview]
Message-ID: <aiGAXJhYJoUuqB5j@stanley.mountain> (raw)

Sparse doesn't let you declare a variable immediately after a case
statement but that's something we do in the kernel these days.  The
"b" declaration is fine, but "c" generates a warning.

regards,
dan carpenter

$ ./sparse test.c
test.c:10:17: error: typename in expression
test.c:10:21: error: Expected ; at end of statement
test.c:10:21: error: got c
test.c:10:17: error: undefined identifier 'int'
$

#include <stdio.h>

void func(int a)
{
	switch (a) {
	case 1:
		printf("hello\n");
		int b;
	case 2:
		int c;
	}
}


             reply	other threads:[~2026-06-04 13:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-04 13:40 Dan Carpenter [this message]
2026-06-04 13:48 ` declarations after a case statement Dan Carpenter
2026-06-04 14:21   ` Derek M Jones
2026-06-05  5:50     ` Dan Carpenter
2026-06-05 10:43       ` Derek M Jones

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