--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/TFL/usyntax.sig Fri Oct 18 12:41:04 1996 +0200
@@ -0,0 +1,134 @@
+signature USyntax_sig =
+sig
+ structure Utils : Utils_sig
+
+ type Type
+ type Term
+ type Preterm
+ type 'a binding
+
+ datatype lambda = VAR of {Name : string, Ty : Type}
+ | CONST of {Name : string, Ty : Type}
+ | COMB of {Rator: Preterm, Rand : Preterm}
+ | LAMB of {Bvar : Preterm, Body : Preterm}
+
+ val alpha : Type
+ val bool : Type
+ val mk_preterm : Term -> Preterm
+ val drop_Trueprop : Preterm -> Preterm
+
+ (* Types *)
+ val type_vars : Type -> Type list
+ val type_varsl : Type list -> Type list
+ val mk_type : {Tyop: string, Args:Type list} -> Type
+ val dest_type : Type -> {Tyop : string, Args : Type list}
+ val mk_vartype : string -> Type
+ val is_vartype : Type -> bool
+ val --> : Type * Type -> Type
+ val strip_type : Type -> Type list * Type
+ val strip_prod_type : Type -> Type list
+ val match_type: Type -> Type -> Type binding list
+
+ (* Terms *)
+ val free_vars : Preterm -> Preterm list
+ val free_varsl : Preterm list -> Preterm list
+ val free_vars_lr : Preterm -> Preterm list
+ val all_vars : Preterm -> Preterm list
+ val all_varsl : Preterm list -> Preterm list
+ val variant : Preterm list -> Preterm -> Preterm
+ val type_of : Preterm -> Type
+ val type_vars_in_term : Preterm -> Type list
+ val dest_term : Preterm -> lambda
+
+ (* Prelogic *)
+ val aconv : Preterm -> Preterm -> bool
+ val subst : Preterm binding list -> Preterm -> Preterm
+ val inst : Type binding list -> Preterm -> Preterm
+ val beta_conv : Preterm -> Preterm
+
+ (* Construction routines *)
+ val mk_prop :Preterm -> Preterm
+ val mk_var :{Name : string, Ty : Type} -> Preterm
+ val mk_const :{Name : string, Ty : Type} -> Preterm
+ val mk_comb :{Rator : Preterm, Rand : Preterm} -> Preterm
+ val mk_abs :{Bvar : Preterm, Body : Preterm} -> Preterm
+
+ val mk_eq :{lhs : Preterm, rhs : Preterm} -> Preterm
+ val mk_imp :{ant : Preterm, conseq : Preterm} -> Preterm
+ val mk_select :{Bvar : Preterm, Body : Preterm} -> Preterm
+ val mk_forall :{Bvar : Preterm, Body : Preterm} -> Preterm
+ val mk_exists :{Bvar : Preterm, Body : Preterm} -> Preterm
+ val mk_conj :{conj1 : Preterm, conj2 : Preterm} -> Preterm
+ val mk_disj :{disj1 : Preterm, disj2 : Preterm} -> Preterm
+ val mk_pabs :{varstruct : Preterm, body : Preterm} -> Preterm
+
+ (* Destruction routines *)
+ val dest_var : Preterm -> {Name : string, Ty : Type}
+ val dest_const: Preterm -> {Name : string, Ty : Type}
+ val dest_comb : Preterm -> {Rator : Preterm, Rand : Preterm}
+ val dest_abs : Preterm -> {Bvar : Preterm, Body : Preterm}
+ val dest_eq : Preterm -> {lhs : Preterm, rhs : Preterm}
+ val dest_imp : Preterm -> {ant : Preterm, conseq : Preterm}
+ val dest_select : Preterm -> {Bvar : Preterm, Body : Preterm}
+ val dest_forall : Preterm -> {Bvar : Preterm, Body : Preterm}
+ val dest_exists : Preterm -> {Bvar : Preterm, Body : Preterm}
+ val dest_neg : Preterm -> Preterm
+ val dest_conj : Preterm -> {conj1 : Preterm, conj2 : Preterm}
+ val dest_disj : Preterm -> {disj1 : Preterm, disj2 : Preterm}
+ val dest_pair : Preterm -> {fst : Preterm, snd : Preterm}
+ val dest_pabs : Preterm -> {varstruct : Preterm, body : Preterm}
+
+ val lhs : Preterm -> Preterm
+ val rhs : Preterm -> Preterm
+ val rator : Preterm -> Preterm
+ val rand : Preterm -> Preterm
+ val bvar : Preterm -> Preterm
+ val body : Preterm -> Preterm
+
+
+ (* Query routines *)
+ val is_var : Preterm -> bool
+ val is_const: Preterm -> bool
+ val is_comb : Preterm -> bool
+ val is_abs : Preterm -> bool
+ val is_eq : Preterm -> bool
+ val is_imp : Preterm -> bool
+ val is_forall : Preterm -> bool
+ val is_exists : Preterm -> bool
+ val is_neg : Preterm -> bool
+ val is_conj : Preterm -> bool
+ val is_disj : Preterm -> bool
+ val is_pair : Preterm -> bool
+ val is_pabs : Preterm -> bool
+
+ (* Construction of a Preterm from a list of Preterms *)
+ val list_mk_comb : (Preterm * Preterm list) -> Preterm
+ val list_mk_abs : (Preterm list * Preterm) -> Preterm
+ val list_mk_imp : (Preterm list * Preterm) -> Preterm
+ val list_mk_forall : (Preterm list * Preterm) -> Preterm
+ val list_mk_exists : (Preterm list * Preterm) -> Preterm
+ val list_mk_conj : Preterm list -> Preterm
+ val list_mk_disj : Preterm list -> Preterm
+
+ (* Destructing a Preterm to a list of Preterms *)
+ val strip_comb : Preterm -> (Preterm * Preterm list)
+ val strip_abs : Preterm -> (Preterm list * Preterm)
+ val strip_imp : Preterm -> (Preterm list * Preterm)
+ val strip_forall : Preterm -> (Preterm list * Preterm)
+ val strip_exists : Preterm -> (Preterm list * Preterm)
+ val strip_conj : Preterm -> Preterm list
+ val strip_disj : Preterm -> Preterm list
+ val strip_pair : Preterm -> Preterm list
+
+ (* Miscellaneous *)
+ val mk_vstruct : Type -> Preterm list -> Preterm
+ val gen_all : Preterm -> Preterm
+ val find_term : (Preterm -> bool) -> Preterm -> Preterm
+ val find_terms : (Preterm -> bool) -> Preterm -> Preterm list
+ val dest_relation : Preterm -> Preterm * Preterm * Preterm
+ val is_WFR : Preterm -> bool
+ val ARB : Type -> Preterm
+
+ (* Prettyprinting *)
+ val Term_to_string : Term -> string
+end;