Re: How to substitute text with combining characters?

On Sunday, June 29, 2014 4:41:04 PM UTC+2, kks...@gmail.com wrote:
> On Sunday, June 29, 2014 5:08:08 AM UTC+7, glts wrote:
> > On Saturday, June 28, 2014 6:21:23 PM UTC+2, kks...@gmail.com wrote:
> > > For text `é,e` (\x65 \u0301 \x2c \x65):
> > >
> > > If I use `:s/\Ze/x/g`, I get `x,x`. How to get `x́,x`?
> > >
> > > If I use `:s/́/̂/g` (substitue \u0301 with \u0302), I get ̂`,e`. How to get `ê,e`?
> > >
> > > Is this a bug or not?
> >
> > The first example works for me. Have you tried with a recent version of
> > Vim?
> >
> > The second example I managed to get working with this hack:
> >
> > :s/.́/\=submatch(0)[0:(strlen(nr2char(char2nr(submatch(0))))-1)] . "\u0302"/g
> >
> > This matches any character with an acute on it, then chops off the bytes
> > following the base character (that is, the combining acute), and then
> > concatenates the base character with the combining circumflex. I made
> > sure that it works for multi-byte base characters, too. But there has
> > got to be an easier solution.
> >
> > Vim support for combining characters isn't complete. Check the todo list
> > at ":h todo" (be aware that todo.txt talks about "composing characters"
> > instead of the proper "combining characters").
>
> Both examples did not work on my Vim 7.4.335.
>
> Thanks for the hints ":h todo" and "composing character". It seems what I want is a "known bug".

I see why it worked on my Vim 7.4.347. I'm still avoiding the new regexp
engine by setting 'regexpengine' to 1, precisely because it has these
bugs.

Using the old regexp engine the first example you gave works fine.

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