From: Jacek Masiulaniec <jacekm@dobremiasto.net>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: [9fans] com: comments toggle in acme
Date: Tue, 13 Nov 2012 23:13:27 +0000 [thread overview]
Message-ID: <CA+BaOWxu0dTDpj7AnoqkGUyf7zgx1mFjaT_qe5+VSmQ+=KRfTA@mail.gmail.com> (raw)
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My latest addition to the acme column tag, alongside |a-, |a+, and |fmt.
#!/usr/bin/env rc
fn f {
n=$1
if(! cat $f | cut -c1-$n | 9 grep -v '^[ ]+$' >/dev/null){
x=`{f `{expr $n + 1}}
echo '.'$"x
}
}
f=/tmp/com.$pid
cat >$f
switch($%){
case *.go *.c
c='//'
case *
c='#'
}
# Remove comment?
if(cat $f | 9 grep '^[ ]*'$c' ' >/dev/null){
cat $f | 9 sed 's|'$c' ||'
rm $f
exit
}
# Add comment.
s=`{f 1}
if(~ $#s 0)
cat $f | 9 sed 's|^|'$c' |'
if not
cat $f | 9 sed 's|^('$"s')|\1'$c' |'
rm $f
I name this |com. The original motivation was to avoid manual keying in of
the comment characters, which I found myself doing quite frequently for
short line ranges.
It also works well with Go's "imported and not used" error. Once plumbed to
the offending import line, it only takes one click to temporarily disable
an import.
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next reply other threads:[~2012-11-13 23:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-13 23:13 Jacek Masiulaniec [this message]
2012-11-16 4:16 ` 6o205zd02
2012-11-16 8:15 ` Martin Kühl
2012-11-16 9:55 ` Mark van Atten
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