Re: horizontal range, kindof

On Tuesday, June 28, 2016 at 6:11:42 PM UTC+8, BPJ wrote:
> Mind the reply to!
>
> Den 27 jun 2016 17:53 skrev "Tumbler Terrall" <kingdom...@gmail.com>:
>
> >
>
> > On Monday, June 27, 2016 at 6:12:47 AM UTC-5, BPJ wrote:
>
> > > I'm trying to do a substitution in a 'horizontal/virtual column range'.
>
> > >
>
> > > I have an ASCII table where the columns are separated by tab
>
> > > characters (for now). I want to wrap the contents (which contain
>
> > > space (U+0020) and \S characters, being of unequal length of
>
> > > course!) of some specific table columns in asterisks (think
>
> > > Markdown emphasis). I thought I could use a range and \%v to
>
> > > match the text between two screen virtual columns and then use an
>
> > > expression with substitute() to wrap instances of \T\+
>
> > > inside the matched screen column range, something like
>
> > >
>
> > >     'a,'b s/\%13v.*\%46v/\=substitute(submatch(0),'\T\+','*&*','g')/
>
> > >
>
> > > but apparently I've misunderstood \%v because I get no match.
>
> > > So what is the right way to do this? I'm not looking forward to
>
> > > changing three columns on some 70 lines manually!
>
> > >
>
> > > /bpj
>
> >
>
> > What are you trying to match with "\T"? Because as far as I can tell that
>
> > matches the letter "t". If you're looking to match tabs, that would be "\t".
>
> > The case does make a difference.
>
> It was intended to  match anything but a tab, but I see now that that escape isn't supported by Vim. Anyway I ended up writing an external filter in Perl, since the needed steps turned out to be somewhat more complicated than I first thought: I needed to leave some Pandoc footnote marks outside the emphasis.


a backslash inside a pair of single quotes represents a backslash, literally. Look into usr_41.txt and search for "single quote".

:echo '\t' == "\t"

would results in 0, which means False.

If you want a tab character you would have to put \t in double quotes.





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