of A.Var a => (case Symbol.look vars a
of NONE => (ErrorMsg.error mark ("variable `"^(Symbol.name a)^"' not declared here") ; raise ErrorMsg.Error)
| SOME t => t)
+ | A.Cast (ty, e') => if (T.issmall ty) andalso (T.issmall (typeof (tds, funcs) vars mark e'))
+ then ty
+ else (ErrorMsg.error mark ("cannot cast: one of `"^(T.Print.pp_type ty)^"' or `"^(T.Print.pp_type (typeof (tds, funcs) vars mark e))^"' was not small"); raise ErrorMsg.Error)
| A.ConstExp _ => T.Int
| A.StringExp _ => T.String
| A.OpExp (A.EQ, [a, b]) =>
| SOME UNASSIGNED => ( ErrorMsg.error mark ("usage of unassigned variable `" ^ Symbol.name v ^ "'") ;
raise ErrorMsg.Error )
| SOME ASSIGNED => ())
+ | varcheck_exp env (A.Cast (ty, e)) mark = varcheck_exp env e mark
| varcheck_exp env (A.ConstExp _) mark = ()
| varcheck_exp env (A.StringExp _) mark = ()
| varcheck_exp env (A.OpExp (_, l)) mark = List.app (fn znt => varcheck_exp env znt mark) l