[Matthieu Moy] > Anyone knows if it is possible in Emacs lisp to write something > looking like > > (funcall 'f x y z t) > > with 'f being a function taking only three arguments ? > > (The opposite of &optional : allow more arguments and ignore the last > ones).
If 'f is declared to accept at most three arguments, I am not aware of any solution. However, if you're asking how to declare 'f in order to facilitate it accepting more arguments than it really needs, that's what the '&rest' keyword is for. From the Elisp manual: : The keyword `&rest' (which will always be followed by a single : parameter) indicates that any number of arguments can follow. The value : of the single following parameter will be a list of all these arguments. : Do not write `&rest' when you call the function. The Elisp '&rest' keyword is rather similar to the "def foo(*args)" syntax in Python. -- Harald
