Switch boolean on line and return

This function can be used to switch between booleans anywhere on the line and returning to original cursor position:

• True → False and False → True,
• true → false and false → true,
• 1 → 0 and 0 → 1.

function! ToggleBool()
   let save_pos = getpos(".")
   normal! 0

   if search('\c\<true\>\|\<false\>', '', line('.')) > 0
       Switch
   elseif search('\<1\>', '', line('.')) > 0
       execute 's/\<1\>/0/'
   elseif search('\<0\>', '', line('.')) > 0
       execute 's/\<0\>/1/'
   endif

   call setpos(".", save_pos)
endfunction

command! -nargs=0 ToggleBool call ToggleBool()