removed make_chart;
theories are now read from the current directory (because of use_dir)
(* Title: MiniML.thy
Author: Thomas Stauner
Copyright 1995 TU Muenchen
Recursive definition of type inference algorithm I for Mini_ML.
*)
I = W +
consts
I :: "[expr, type_expr list, nat, subst] => result_W"
primrec I expr
I_Var "I (Var i) a n s = (if i < length a then Ok(s, nth i a, n)
else Fail)"
I_Abs "I (Abs e) a n s = I e ((TVar n)#a) (Suc n) s bind
(%(s,t,m). Ok(s, Fun (TVar n) t, m) )"
I_App "I (App e1 e2) a n s =
I e1 a n s bind
(%(s1,t1,m1). I e2 a m1 s1 bind
(%(s2,t2,m2). mgu ($s2 t1) (Fun ($s2 t2) (TVar m2)) bind
(%u. Ok($u o s2, TVar m2, Suc m2) ) ))"
end