How can I expand a:000 list in order to pass through all varargs parameters to another function?

Question

I have a varargs function, which I want to refactor to include a separate 'argument handling function' first, so that that becomes separately callable. I've read :help function-argument but was unable to discover how to expand a:000, which comes as a list of strings, so that bar can also accept varargs in the same way?

fu! Foo(...) abort
  let s = Bar(a:000[???])
endfunction

Answer 1

Use :h call():

func! Bar(...) abort
    return a:000
endfunc
func! Foo(...) abort
    echo call('Bar', a:000)
endfunc

call Foo('asdf', 'qwer') " --> ['asdf', 'qwer']