(* Title: ZF/ex/ListN
ID: $Id$
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
Copyright 1994 University of Cambridge
Inductive definition of lists of n elements
See Ch. Paulin-Mohring, Inductive Definitions in the System Coq.
Research Report 92-49, LIP, ENS Lyon. Dec 1992.
*)
ListN = List +
consts listn ::i=>i
inductive
domains "listn(A)" <= "nat*list(A)"
intrs
NilI "<0,Nil> : listn(A)"
ConsI "[| a: A; <n,l> : listn(A) |] ==> <succ(n), Cons(a,l)> : listn(A)"
type_intrs "nat_typechecks @ list.intrs"
end