|
915
|
1 |
(* Title: ZF/Coind/Language.thy
|
|
|
2 |
ID: $Id$
|
|
|
3 |
Author: Jacob Frost, Cambridge University Computer Laboratory
|
|
|
4 |
Copyright 1995 University of Cambridge
|
|
|
5 |
*)
|
|
|
6 |
|
|
|
7 |
Language ="Datatype" + QUniv +
|
|
|
8 |
|
|
932
|
9 |
consts
|
|
|
10 |
Const :: "i" (* Abstract type of constants *)
|
|
|
11 |
c_app :: "[i,i] => i" (*Abstract constructor for fun application*)
|
|
915
|
12 |
|
|
|
13 |
rules
|
|
932
|
14 |
constNEE "c:Const ==> c ~= 0"
|
|
|
15 |
c_appI "[| c1:Const; c2:Const |] ==> c_app(c1,c2):Const"
|
|
915
|
16 |
|
|
|
17 |
|
|
|
18 |
consts
|
|
932
|
19 |
Exp :: "i" (* Datatype of expressions *)
|
|
|
20 |
ExVar :: "i" (* Abstract type of variables *)
|
|
|
21 |
datatype <= "univ(Const Un ExVar)"
|
|
|
22 |
"Exp" = e_const("c:Const")
|
|
|
23 |
| e_var("x:ExVar")
|
|
|
24 |
| e_fn("x:ExVar","e:Exp")
|
|
|
25 |
| e_fix("x1:ExVar","x2:ExVar","e:Exp")
|
|
|
26 |
| e_app("e1:Exp","e2:Exp")
|
|
915
|
27 |
|
|
|
28 |
end
|