Subject: Re: Larry Wall & Cults
From: (Rob Warnock)
Date: Sat, 28 Aug 2004 23:14:55 -0500
Newsgroups: comp.lang.perl.misc,alt.folklore.computers,comp.lang.lisp,comp.lang.python,comp.unix.programmer
Message-ID: <>
| jdoherty@nowhere.null.not (John Doherty) wrote:
| Eight.  Now talk about indenting skip returns...that one
| required blood transfusions.  [emoticon looks at list of n.g.]
| I guess not many will understand.
You might be surprised, Barb. Quite a few of the comp.lang.lisp crew 
are former PDP-10 geeks.  ;-}
And just to be sure *I'm* understanding what you're talking about,  ;-}
did you mean the convention of the second line of the following snippet?
    foo:    pushj   p,ckperm
	     pjrst  badprm          ; user lacks privs, complain & return.
	    movei   t0,cmdblk       ; o.k. to proceed.

Indenting the non-skip return for a subroutine call was always pretty 
clear to me. Where things got really muddled (and contentious!) was 
when you had long skip chains of T{R,L}{Z,O,C,~}{N,E} instructions 
in which whether a particular instruction was in the skipped-to or 
non-skipped position depended dynamically on the flow of control 
above it. [HAKMEM was chock-full of that kind of "efficient" code.]
In that case, it seemed more readable to simply not indent anything in
the skip chain, and put a scary comment warning about the tricky code.


Rob Warnock			<>
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