On Tue, March 8, 2011 1:23 pm, ZyX wrote:
> Consider the following script:
> % cat > expr-feedkeys.vim <<EOF
> set nocompatible
> let g:n=0
> function FeedKeys()
> call feedkeys("i".g:n."\e")
> let g:n+=1
> return ""
> endfunction
> nnoremap <expr> a FeedKeys()
> nnoremap b :call FeedKeys()<CR>
> EOF
> % vim -u NONE -S expr-feedkeys.vim -s <(echo 'ab:wq! text')
> This will create file `text' that contains the only character `1' (and NL,
> of
> course), while expected to have two characters: `0' and `1'. Tested on
> vim-7.3.102 (from Gentoo repos) and vim-7.3.138 (mercurial rev
> ea399ac2c1b9).
I think, expr-mappings don't see the typeahead until after the mapping
finished. If you want to use feedkeys() inside an expression mapping, you
need to return the feedkeys call, e.g (untested):
return ':call feedkeys("i".g:n."\e")'."\n"
regards,
Christian
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