On 2013-11-15, BPJ wrote:
> 2013-11-15 22:54, Gary Johnson skrev:
> >On 2013-11-15, BPJ wrote:
> >>2013-11-15 17:45, Bee skrev:
> >
> >>>nnoremap * g*
> >>>" multi line search -- selection literal :help c_<C-R>
> >>>" substitute({expr}, {pat}, {sub}, {flags})
> >>>vnoremap *
> >>>y/\c\V<C-R><C-R>=substitute(escape(@@,'/\'),'\n','\\n','g')<cr><cr>
> >>>" '''''' ||| | | | | | | | | |
> >>>+{flags} g=all
> >>>" '''''' ||| | | | | | | | | +{sub}
> >>>" '''''' ||| | | | | | | | +{pat}
> >>>" '''''' ||| | | | | | | +chars to escape
> >>>" '''''' ||| | | | | | +contents of unnamed register
> >>>" '''''' ||| | | | | +{expr}
> >>>" '''''' ||| | | | +expression register
> >>>" '''''' ||| | | +contents of register LITERALLY
> >>>" '''''' ||| | +contents of register
> >>>" '''''' ||| +VERY nomagic, only \ is magic
> >>>" '''''' ||+ignore case
> >>>" '''''' |+search
> >>>" '''''' +yank selected into unnamed register
> >>>
> >>
> >>I don't get the idea with the substitute(); would someone please
> >>enlighten me? I speak only pidgin vimscript! :-)
> >
> >Since you are searching for a literal string, you want all the
> >characters in that string to represent themselves and not be
> >interpreted specially. For example, if the string contains an
> >asterisk, you want that asterisk to be treated as a literal
> >asterisk, not as zero or more occurrences of the preceding atom.
> >
> >The substitute() is there to escape any characters having special
> >meaning in a search string so that they are treated as their literal
> >forms.
>
> Of course, but why is '\n' singled out for special treatment?
Oh, OK, I wasn't sure what part you didn't get.
The escape() function escapes special characters but does not do
anything with newlines because they aren't special in that sense.
The substitute() replaces any real newlines in the string, which
would be there if the string spanned two or more lines, with the
two-character pattern '\n', which tells the search to match a
newline at those points in the string.
Regards,
Gary
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