* http://helm.cs.unibo.it/
*)
-exception AssertFailure of string
exception MetaSubstFailure of string
+exception Uncertain of string
+exception AssertFailure of string
+exception DeliftingARelWouldCaptureAFreeVariable;;
(* The entry (i,t) in a substitution means that *)
(* (META i) have been instantiated with t. *)
-type substitution = (int * Cic.term) list
+(* type substitution = (int * (Cic.context * Cic.term)) list *)
-val delift :
- int -> substitution -> Cic.context -> Cic.metasenv ->
- (Cic.term option) list -> Cic.term ->
- Cic.term * Cic.metasenv * substitution
+ (** @raise SubstNotFound *)
(* apply_subst subst t *)
(* applies the substitution [subst] to [t] *)
(* [subst] must be already unwinded *)
-val apply_subst : substitution -> Cic.term -> Cic.term
-(* apply_subst_reducing subst (Some (mtr,reductions_no)) t *)
-(* performs as (apply_subst subst t) until it finds an application of *)
-(* (META [mtr]) that, once unwinding is performed, creates a new *)
-(* beta-redex; in this case up to [reductions_no] consecutive *)
-(* beta-reductions are performed. *)
-(* Hint: this function is usually called when [reductions_no] *)
-(* eta-expansions have been performed and the head of the new *)
-(* application has been unified with (META [meta_to_reduce]): *)
-(* during the unwinding the eta-expansions are undone. *)
-(* [subst] must be already unwinded *)
-val apply_subst_reducing :
- (int * int) option -> substitution -> Cic.term -> Cic.term
+val apply_subst : Cic.substitution -> Cic.term -> Cic.term
+val apply_subst_context : Cic.substitution -> Cic.context -> Cic.context
+val apply_subst_metasenv: Cic.substitution -> Cic.metasenv -> Cic.metasenv
+
+(*** delifting ***)
-val apply_subst_context : substitution -> Cic.context -> Cic.context
-val apply_subst_metasenv: substitution -> Cic.metasenv -> Cic.metasenv
+val delift :
+ int -> Cic.substitution -> Cic.context -> Cic.metasenv ->
+ (Cic.term option) list -> Cic.term ->
+ Cic.term * Cic.metasenv * Cic.substitution
+val restrict :
+ Cic.substitution -> (int * int) list -> Cic.metasenv ->
+ Cic.metasenv * Cic.substitution
+(** delifts the Rels in t of n
+ * @raise DeliftingARelWouldCaptureAFreeVariable
+ *)
+val delift_rels :
+ Cic.substitution -> Cic.metasenv -> int -> Cic.term ->
+ Cic.term * Cic.substitution * Cic.metasenv
+
(** {2 Pretty printers} *)
-val ppsubst: substitution -> string
-val ppterm: substitution -> Cic.term -> string
-val ppcontext: ?sep: string -> substitution -> Cic.context -> string
+val ppsubst_unfolded: Cic.substitution -> string
+val ppsubst: Cic.substitution -> string
+val ppterm: Cic.substitution -> Cic.term -> string
+val ppcontext: ?sep: string -> Cic.substitution -> Cic.context -> string
val ppterm_in_context:
- substitution -> Cic.term -> (Cic.name option) list -> string
-val ppmetasenv: ?sep: string -> Cic.metasenv -> substitution -> string
+ Cic.substitution -> Cic.term -> (Cic.name option) list -> string
+val ppmetasenv: ?sep: string -> Cic.metasenv -> Cic.substitution -> string
(** {2 Format-like pretty printers}
* As above with prototypes suitable for toplevel/ocamldebug printers. No
* with only one argument.
*)
-val fppsubst: Format.formatter -> substitution -> unit
+val fppsubst: Format.formatter -> Cic.substitution -> unit
val fppterm: Format.formatter -> Cic.term -> unit
val fppmetasenv: Format.formatter -> Cic.metasenv -> unit
-(* {2 Kernel wrappers}
- * From now on we recreate a kernel abstraction where substitutions are part of
- * the calculus *)
-
-val lift : substitution -> int -> Cic.term -> Cic.term
-val subst: substitution -> Cic.term -> Cic.term -> Cic.term
-val whd: substitution -> Cic.context -> Cic.term -> Cic.term
-val are_convertible: substitution -> Cic.context -> Cic.term -> Cic.term -> bool
-
-val type_of_aux':
- Cic.metasenv -> substitution -> Cic.context -> Cic.term -> Cic.term
+(*
+(* DEBUG *)
+val print_counters: unit -> unit
+val reset_counters: unit -> unit
+*)
+(* val clean_up_meta :
+ Cic.substitution -> Cic.metasenv -> Cic.term -> Cic.term
+*)