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From: z007400b@bc.seflin.org (Ralph Silverman)
Subject: Re: International Algorithmic language
Date: 1997/08/15
Message-ID: <5t1lso$sad@nntp.seflin.org>#1/1
X-Deja-AN: 264431008
References: <5sfeus$a1i@nntp.seflin.org> <5spvub$qns@nntp.seflin.org>
Organization: SEFLIN Free-Net 
Newsgroups: 
 comp.unix.bsd,comp.lang.pascal,comp.lang.pascal.misc,comp.lang.ada,comp.unix.programmer
Date: 1997-08-15T00:00:00+00:00
List-Id: <comp.lang.ada>


	internationalization of algorithmic language
	( part f. )
	addendum

	alternative forms in one-loop language
	->-> important change in loop form !!!!!

	for purposes of this discussion ...
	notation is introduced to indicate different,
	related,  loop forms ...

	<+>{} shall represent infinite loop
	( as prior treated as
		<>{}
	)
	<->{} shall represent 'one-pass' loop
	which now shall replace former ...

	a)  near equivalence of forms ...

	a one-pass loop can generate an infinite loop
	with simple modification as ...

		/* code here */
		<->{	/* begin one-pass loop form */
			/* code here */
			<-<->;	/* no-test continue */
		}	/* <-> */ 



	an infinite loop can generate a one-pass loop
	with simple modification as ...

		/* code here */
		<+>{	/* begin infinite loop form */
			/* code here */
			~<+>;	/* no-test break */
		}	/* <+> */ 

	b) difficult choice !!!
	obviously,  loop forms are similar to
	'mirror image'
 	...

	reasons for choice ...
	in favor of infinite form ( <+> )
		a) simpler source in many cases ...
		b) 'continue' form ( <-<> ) ...
		while useful,  is not essential
		to topology ...

	in favor of 'one-pass' form ( <-> ) ...
		a) more closely reflects underlying
		assembler reality ...
		( generally less abstract ... )
		b) more precise,  and general,
		means of manifesting loop topology ...

--

Ralph Silverman
z007400b@bcfreenet.seflin.lib.fl.us