Implementing basic library functions in LISP (manually)

Is there any way by which I can define functions my_list, my_cons, my_append which perform similar function as list, cons and append respectively?

Otherwise where can I find the implementatio开发者_开发问答n of these functions?

Thanks

For my_list and my_append, the solutions are:

(defun my_list (&rest arguments)
    `(,@arguments)
)

(defun my_append (a_list an_item)
    `(,@a_list ,an_item)
)

(my_append (my_list 'a 'b 'c) 'd)

I'm probably wrong but I dont know any alternative method to make pairs, so an alternative to cons do not seems possible. Still, I'm quite new to the LISP world.

If you want your lists to be the same as the onces native to your application, You have to start with some primitive to construct a cons, probably cons or dotted-pair, and something to pull a cons cell apart (car, cadr). The others can be build from that.

If you want to re-implement things that are functionally (pun intended) equivalent, see http://en.wikipedia.org/wiki/Cons#Not_technically_fundamental