rc-list - mailing list for the rc(1) shell
 help / color / mirror / Atom feed
From: Byron Rakitzis <byron@rakitzis.com>
To: fosterd@hartwick.edu, rc@hawkwind.utcs.toronto.edu
Subject: Re: tilde featuritis alert
Date: Fri, 10 Dec 1999 02:45:04 -0500	[thread overview]
Message-ID: <199912100745.XAA29345@peanut.rakitzis.com> (raw)

>It seems to me that a simple rule would suffice here. An '=' in the
>first word of a command is interpreted as a metacharacter. An '=' in
>the rest of it is not. Oh, but there is the issue of 'foo = bar' (I
>find myself trying to do that frequently in sh now.) OK, an unquoted
>'=' is a metacharacter iff (it's part of the first word || it's the
>first character in the second word). That should continue to allow
>'foo =bar' as well.

For better or for worse, rc's grammar allows for multiple temporary
assignments:

	; foo=1 bar=2 echo $foo $bar
	1 2
	; echo $foo $bar
	
	; 

So you have to account for that as well.

With sufficient tweaking to the parser and lexer perhaps you could allow
unquoted '='s in a parameter list, but I tried my hand at it years ago
and I wasn't able to come up with anything remotely pleasant.

Byron.


             reply	other threads:[~1999-12-10  8:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1999-12-10  7:45 Byron Rakitzis [this message]
1999-12-10  9:32 ` Gert-Jan Vons
  -- strict thread matches above, loose matches on Subject: below --
1999-12-09  7:52 Decklin Foster
1999-12-09  8:26 ` Markus Friedl
1999-12-09  8:52 ` Gert-Jan Vons
1999-12-09 14:20   ` Decklin Foster
1999-12-09 16:48   ` Paul Haahr
1999-12-09 16:27 ` Mark K. Gardner
1999-12-09 22:08 ` kim kubik

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=199912100745.XAA29345@peanut.rakitzis.com \
    --to=byron@rakitzis.com \
    --cc=fosterd@hartwick.edu \
    --cc=rc@hawkwind.utcs.toronto.edu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).