Hi Bram!

On Mi, 03 Okt 2012, Bram Moolenaar wrote:

> 
> Christian Brabandt wrote:
> 
> > On Mon, October 1, 2012 13:16, Marcin Szamotulski wrote:
> > > On 09:20 Sun 23 Sep     , Marcin Szamotulski wrote:
> > >> Hello
> > >>
> > >> The c_CTRL-\_e (<C-\>e) maps inside expression register are not working.
> > >> There is a very nice emacscommandline
> > >> (http://www.vim.org/scripts/script.php?script_id=3554)
> > >> plugin which defines lots of nice maps in this way, but then when one
> > >> tries to write to expression register one gets errors. The minimal setup
> > >> to reproduce this is:
> > >>
> > >> fun X()
> > >>   return 'echo "X"'
> > >> endfun
> > >> cnoremap X <C-\>eX()<CR>
> > >>
> > >> Now please try in insert mode:
> > >> <c-r>=X
> > >> and after pressing X I get the following error:
> > >> E15: invalid expression: ^eX()
> > >> E15: invalid expression: ^eX()
> > >>
> > >> I got it twice. I think it would be nice to have the <C-\>e maps
> > >> working inside expression register (and in this case it would be nice of
> > >> vim script knew it, for example through including the '=' into to
> > >> getcmdline()) or to disable the <C-\>e maps inside the expression
> > >> register.
> > >>
> > >> Best regards,
> > >> Marcin
> > >
> > > In case somebody will stumble across this post, the solution that
> > > I found for this is to define another map:
> > >     cnoremap <C-b> <C-R>
> > > etc ... . It will not trigger the emacscommand line maps. One just has
> > > to remember to not to use <C-W> while entering things into the
> > > expression register (which is used rarely, so there is not much
> > > opportunity to learn it, and lots of chances to forget it ;)
> > >
> > > But this is far from perfect.
> > 
> > Would it be enough to simply disallow mappings in expression evalution mode?
> 
> Would this not stop other mappings from working, e.g.:
> 
>       cnoremap <C-Y> yank()

Yes, in Expression evaluation mode (i.e. when doing <c-r>=)

regards,
Christian
-- 
Eine freie Seele, wie die seine, kommt in Gefahr, frech zu 
werden, wenn nicht ein edles Wohlwollen das sittliche Gleichgewicht 
herstellt.
                -- Goethe, Maximen und Reflektionen, Nr. 190

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