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Path: utzoo!linus!decvax!harpo!eagle!allegra!alan
From: alan@allegra.UUCP
Newsgroups: net.lang.c
Subject: Re: Breaking out of labeled statements - (nf)
Message-ID: <1799@allegra.UUCP>
Date: Wed, 31-Aug-83 10:13:24 EDT
Article-I.D.: allegra.1799
Posted: Wed Aug 31 10:13:24 1983
Date-Received: Thu, 1-Sep-83 04:37:37 EDT
References: <2672@uiucdcs.UUCP>
Organization: Bell Labs, Murray Hill
Lines: 33


	Another thing that would be very useful in case statements
	would be a 'recase'  verb, which would restart the enclosing
	switch (i guess in C it would be 'reswitch'). It is often useful
	to be able to recognize some cases as only minor variants of
	others, and process them by using a prologue for one variant
	followed by the existing case treatment shared between them.
	A reswitch verb would make this trivial.


In certain cases, C allows you to do exactly what you're asking for.

	switch (a) {

	  case ONE_THING:
		/* code for ONE_THING */
		break;

	  case A_VARIATION_ON_A_SECOND_THING:
		/* prologue, then fall through... */

	  case A_SECOND_THING:
		/* common code for A_SECOND_THING and variation */
		break;

	}

Of course, there can't be two variations, each with its own prologue,
of one case, so this is of limited use.


	Alan Driscoll
	Bell Labs, Murray Hill