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* unix RC shell bug
       [not found] <E15cuG8-000P4t-0Y@anchor-post-34.mail.demon.net>
@ 2001-09-01  5:11 ` Matt
  2001-09-03  6:14   ` Callum Gibson
  2001-09-03  6:18   ` Decklin Foster
  0 siblings, 2 replies; 5+ messages in thread
From: Matt @ 2001-09-01  5:11 UTC (permalink / raw)
  To: 9fans; +Cc: rc

after hours of not noticing one of my variables was a list and not a
string (it's 5am I've been on this since 10pm!) I eventually got to
this sorry state.

in good ol' plan9

cpu% t=(1 2 3 6 7)
cpu% echo $#t
5
cpu% echo $"t
1 2 3 6 7

in /usr/local/bin/rc (ver 1.6) on FreeBSD (ver 4.2-RELEASE)

; t=(1 2 3 6 7)
; echo $#t
5
; echo $"t
syntax error


just fyi



^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: unix RC shell bug
  2001-09-01  5:11 ` unix RC shell bug Matt
@ 2001-09-03  6:14   ` Callum Gibson
  2001-09-03  6:18   ` Decklin Foster
  1 sibling, 0 replies; 5+ messages in thread
From: Callum Gibson @ 2001-09-03  6:14 UTC (permalink / raw)
  To: matt; +Cc: rc

matt@proweb.co.uk writes:
}cpu% echo $"t
}1 2 3 6 7

The list flattening operator is ^ not " in the unix rc. i.e. echo $^t

This is mentioned in the INCOMPATIBILITIES section of the manpage.
Don't know why this is the case, other than to avoid possible confusion
with the meaning of " as a quote char in other unix shells, plus ^ is
used as the concatenation operator anyway as in:
; echo (a b c)^(1 2 3)

(c)2001 Callum Gibson                       callum.gibson@db.com
Global Markets IT, Deutsche Bank, Australia       61 2 9258 1620
### The opinions in this message are mine and not Deutsche's ###


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: unix RC shell bug
  2001-09-01  5:11 ` unix RC shell bug Matt
  2001-09-03  6:14   ` Callum Gibson
@ 2001-09-03  6:18   ` Decklin Foster
  1 sibling, 0 replies; 5+ messages in thread
From: Decklin Foster @ 2001-09-03  6:18 UTC (permalink / raw)
  To: Matt; +Cc: rc

Matt writes:

> ; echo $"t
> syntax error

It's $^t -- See the INCOMPATIBILITES section in the man page. I am
unsure of the reasons for this, but the ChangeLog notes:

1999-01-05

  Documentation: the Bell Labs rc now has the list flattening operator,
  but spelt $"foo.

-- 
things change.
decklin@red-bean.com


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: unix RC shell bug
@ 2001-09-03  7:23 Byron Rakitzis
  0 siblings, 0 replies; 5+ messages in thread
From: Byron Rakitzis @ 2001-09-03  7:23 UTC (permalink / raw)
  To: decklin, matt; +Cc: rc

$^ came years before $" was introduced into plan9's rc.

I guess there's no reason not to make Unix rc understand $" as well,
but it would be important to leave $^ as is.


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: unix RC shell bug
@ 2001-09-03  8:19 Smarasderagd
  0 siblings, 0 replies; 5+ messages in thread
From: Smarasderagd @ 2001-09-03  8:19 UTC (permalink / raw)
  To: byron, decklin, matt; +Cc: rc

Byron Rakitzis <byron@rakitzis.com> writes:
>$^ came years before $" was introduced into plan9's rc.
>
>I guess there's no reason not to make Unix rc understand $" as well,
>but it would be important to leave $^ as is.

Ideally, other uses of " should not become syntax errors, although I haven't
taken advantage of it being just another character myself.


^ permalink raw reply	[flat|nested] 5+ messages in thread

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Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <E15cuG8-000P4t-0Y@anchor-post-34.mail.demon.net>
2001-09-01  5:11 ` unix RC shell bug Matt
2001-09-03  6:14   ` Callum Gibson
2001-09-03  6:18   ` Decklin Foster
2001-09-03  7:23 Byron Rakitzis
2001-09-03  8:19 Smarasderagd

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