foo.vim

" display a visual aid when lining long things up
" disable colorcolumn entirely if
" - cursor is in the first column
" - cursor is in the same column that &colorcolumn is set to
function! ColorColumnAtCursorPositionToggle()
  let column = col('.')
  if exists(&colorcolumn) || column == 1 || column == &colorcolumn
    set colorcolumn&
  else
    let &colorcolumn = column
    echohl ModeMsg
    echo 'Colorcolumn set at column ' . column
    echohl None
  endif
endfunction