[9fans] C99 and you

[Skip Tavakkolian <9nut@9netics.com>]

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somebody had a question a couple of days ago.  i wonder if the declaration
was inside a switch or after a label?

in the example below, if the seemingly superfluous ';' (comments 1, and 2)
are removed, it is a syntax error.  also note the scope of the declaration
inside a switch (e.g. when argc==1)

explanation:	http://www.thescripts.com/forum/thread214730.html
reference: 	http://wwwold.dkuug.dk/jtc1/sc22/open/n2794/n2794.txt	(look for A.2.3)

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#include <u.h>
#include <libc.h>

main(int argc, char **argv)
{
	int i;

	switch (argc) {
	case 2:
		;	// 1
		int j = 1;
		print("argc = %d; j = %d\n", argc, j);
		break;
	case 1:
		j = 0;
		print("argc = %d; j = %d\n", argc, j);
		break;
	}

	int k;

 foo:
	;	// 2
	int l;

	exits(nil);
}