> Then, "ADDR,$" you're right that could be optimized, unlike "$" or "$!".
> That's a separate feature request.
I'd say it is consistency not optimization. Anyway thanks for feedback!
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Is it about how you do recognize last line before script gets to
the end, i.e. '$' is next-to-last read() without EOF?
Yes. And that "next-to-last" bit is what forces sed to do its lookahead.
In the corner case if the line was read and then
network connection was dropped
... you don't care,
Paolo Bonzini @ Fri, Apr 11, 2008 at 8:06 AM:
> > 'if EOF || Error' or 'if ! read-is-OK'
> >
> > Latter applies for ordinary files also, no? No need of look ahead.
> >
>
> This is the next-to-last line, not the last line. sed does test for it,
> but because the result would be off-by-one, it has
'if EOF || Error' or 'if ! read-is-OK'
Latter applies for ordinary files also, no? No need of look ahead.
This is the next-to-last line, not the last line. sed does test for it,
but because the result would be off-by-one, it has to look ahead one line.
in interactive or line-by-line exam
Hallo, Paolo.
> > Example: 'cycle 3' == 'first address 3' is lost:
> >
>
> Not a bug. sed starts a one-line lookahead behavior when $ is used.
Which is on useless pipes.
Last-line for them can be
'if EOF || Error' or 'if ! read-is-OK'
Latter applies for ordinary files also, no? No need of loo
Oleg Verych wrote:
Package: sed
Version: 4.1.5-1
Severity: normal
Example: 'cycle 3' == 'first address 3' is lost:
Not a bug. sed starts a one-line lookahead behavior when $ is used.
You're right this is unnecessary for ADDR1,$ but it does not cause wrong
behavior -- the output is correct.
Package: sed
Version: 4.1.5-1
Severity: normal
Example: 'cycle 3' == 'first address 3' is lost:
[EMAIL PROTECTED] (while echo -n IN:>&2 && read A; do echo "$A"; sleep 1;
done) | sed 'x ; G ; 3,$s ^ | ; h'
IN:1
1
IN:2
1
2
IN:3
IN:4
|
1
2
3
IN:5
||
1
2
3
4
IN:
[EMAIL PROTECTED]
A
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