Combine FileType with other events

Question

I'd like to combine two events: FileType and TextChangedI. According to this awesome book I can do that, by adding a comma between both events like this:

:autocmd BufWritePre,BufRead *.html :normal gg=G

But if I try that with FileType and TextChangedI like that:

autocmd TextChangedI,FileType c echom "Test"

then I don't get any output if I change something in a c file. How can I achieve that?

Answer 1

As Martin mentions in the comments, the two events match on different things. It would be simpler to make a function and use two autocommands (the combined form works best when both match on the same types of things):

function DoIt() abort
endfunction

augroup my_c_stuff
  autocmd!
  autocmd FileType c call DoIt()
  autocmd TextChangedI *.c call DoIt()
augroup END

An even better solution would be to put the function, call, and text-changed autocommand into an ftplugin:

" ~/.vim/after/ftplugin/c.vim
function DoIt() abort
endfunction

call DoIt()

augroup my_c_stuff
  autocmd! * <buffer>
  autocmd TextChangedI <buffer> call DoIt<()
augroup END
" don’t forget b:undo_ftplugin!