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From: "rob pike" <rob@plan9.bell-labs.com>
To: sam-fans@hawkwind.utcs.toronto.edu
Subject: Re: the obvious. =)
Date: Mon, 27 Mar 2000 09:37:26 -0500	[thread overview]
Message-ID: <00Mar27.152220est.25324@hawkwind.utcs.toronto.edu> (raw)

	,x/^\/\*(.+\n)+ \*\/\n/ t /}\n/

Regular expressions have their limitations, which is why Sam
also has addresses. These provide a simpler and safer way to
match multi-line things like comments:

	,x/^\/\*/ .,/\*\/\n/ t /}\n/

This one works even if there are no blank lines.
Here's a troff paragraph-at-a-time pattern:

	,x/^\.PP/ .,/^\.(PP|SH)/-     ...

Also if there's a slash in the pattern, you can use another character
as the delimiter and save a backslash, as in this example for C++ //
comments:

	x/\/\//  goes to x;//;

Have fun.

-rob



             reply	other threads:[~2000-03-27 20:22 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-03-27 14:37 rob pike [this message]
     [not found] <chaotrope@jps.net>
2000-03-26 20:54 ` kim kubik
2000-03-27  3:35   ` James A. Robinson
  -- strict thread matches above, loose matches on Subject: below --
2000-03-25 23:47 kim kubik
2000-03-26  1:51 ` James A. Robinson
2000-03-24 21:25 James A. Robinson

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