Re-Select Previous Visual Selection with Command

Question

As title. I want to create a function that facilitate this behaviour. I have tried this but it didn't work:

exe 'gv'

I tried from this direction because this works:

exe 'c!'

Answer 1

To run normal mode commands as ex command use :normal! as in

   normal! gv

Note, exclamation mark is for running non-mapped "built-in" functionality:

:nnoremap l :echo "hello"<CR>
" this would echo hello
:normal l
" this would move cursor right
:normal! l