Breaking out of labeled statements - (nf)

[Guy Harris]

"goto"s can be used for treating several cases as subcases of one common
case (i.e., do the case-specific thing and then the common actions), generally
without too tangled code.  Furthermore, if it *does* tangle things, or you don't
want to use "goto"s, many versions of the C "final" optimizer will do the right
thing if you write something like

	case (foo) {

	case 1:
		/* 1-specific things */
		/* common code */
		break;

	case 2:
		/* 2-specific things */
		/* common code */
		break;

		.
		.
		.

and join the common code and stick a jump/branch instruction into the cases.
(Versions known to: PDP-11, VAX-11, Zilog "Zeus", CCI - and probably most
other - 68000).

	Guy Harris
	{seismo,mcnc,we13,brl-bmd,allegra}!rlgvax!guy