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From: rouben@math13.math.umbc.edu (Rouben Rostamian)
Newsgroups: comp.editors,comp.unix.misc
Subject: Re: If you could have anything in vi ...
Message-ID: <5489@umbc3.UMBC.EDU>
Date: 21 Mar 91 11:54:06 GMT
References: <1991Mar18.195343.665@cs.widener.edu> <7214@ecs.soton.ac.uk> <7220@ecs.soton.ac.uk> <1991Mar21.065353.1341@cs.ucla.edu>
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Reply-To: rouben@math13.math.umbc.edu.UUCP (Rouben Rostamian)
Organization: Mathematics Department University of Maryland, Baltimore County
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>In <1991Mar18.195343.665@cs.widener.edu> brendan@cs.widener.edu (Brendan Kehoe) writes:
> I'm working on a "free" version of vi. It's to fully emulate the
>current Berkeley-derived versions. After that, it's prettymuch a
>free-for-all.
> So .. what would you have added to vi, if you could? What would you
>have made an option? What would you change?


Here's my two cents:  I would love to have macros which accept arguments,
as in:

map v(arg) Do-this-and-that-with-arg

To use the macro, the user presses v, and vi prompts for the arg.

Example:

map #i(x) :'m,.s/^/x /

Note that "x" takes on a special meaning in the substitute portion of this
macro;  it stands for a variable, not a literal "x".  A literal "x"
should be quoted, as in "\x", to override the macro substitution.
This macro says that [from the point marked "m"] to [the current line]
insert "x " in the beginning of each line, where x is to be specified.

For instance, to comment-out a block of text in a fortran program, I can
mark the beginning of the range with m, move to the end of the range,
type #i, at which point vi will prompt me for the argument, I will type C,
and then the macro will do the rest.

The very same macro may be used to comment out a block of text in a 
TeX document; just respond with % to the prompt.  In a sh or csh script
respond with #.   To insert "> " markers in replying to someone's
mail, respond with >.  

To un-comment a block of text, I would use the companion macro:

map #r(x) :'m,.s/^..//

--
Rouben Rostamian                          Telephone: (301) 455-2458
Department of Mathematics and Statistics  e-mail:
University of Maryland Baltimore County   bitnet: rostamian@umbc.bitnet
Baltimore, MD 21228,  U.S.A.              internet: rouben@math9.math.umbc.edu