State variables in VIM

Posted by dotancohen on Super User See other posts from Super User or by dotancohen
Published on 2012-07-01T09:41:12Z Indexed on 2012/07/01 15:18 UTC
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vim

Is there any way to have a state variable in VIM? Consider:

" Relative line numbers in Normal mode, absolute in Insert mode. Ctrl-N to toggle 
set relativenumber
autocmd InsertEnter * :set number
autocmd InsertLeave * :set relativenumber
inoremap <C-n> <C-o>:call NumberToggle()<cr>
nnoremap <C-n> :call NumberToggle()<cr>
function! NumberToggle()
  if(useRelNums != 1)
    let useRelNums=1
    set number
  else
    let useRelNums=0
    set relativenumber
  endif
endfunc

Of course, useRelNums is undefined. I would like to keep this variable defined between calls to the NumberToogle() function, i.e. a state variable. How is this done? I'm sure that I could repurpose some other VIM variable as a workaround (such as the state of paste for a bad example) but I would prefer a real solution.

Thanks.

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State variables in VIM - Developer IT

State variables in VIM

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