Re: Use calculations on sub-expressions

On 2014-09-29 02:05, Axel Bender wrote:
> Given the following file:
>
> abc3
> abc4
> bcd1
> bcd3
>
> I'd like to find the line containing bcd1 having a gap (bcd2)
> between it and the next line.

Vim's regex engine(s) don't support doing arithmetic expressions in
the search side. I've wished for something like this in the past
(particularly when searching for IP addresses).

So you'd have to do a NOP replacement on either those you want or
don't want. Something like

:%s#^\(.\{-}\)\(\d\+\)\ze\n\1#\=submatch(0).(getline(line('.')+1)==submatch(1).(submatch(2)+1)?'':'<-- this')

(all one line)
It will mark the first line where the following line isn't one more
than that line, using "<-- this".

I think that's about the best you can do in raw vim without tapping
actual scripting.

-tim




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