split into this and cicMetaSubst.mli

diff --git a/helm/ocaml/cic_unification/cicUnification.mli b/helm/ocaml/cic_unification/cicUnification.mli
index 30094f7f2b7d2b7f0c6a1db9bd2d8794317a222f..40b9f8ef78b2892d2d4f6ddc9bf39f30cff88846 100644 (file)
--- a/helm/ocaml/cic_unification/cicUnification.mli
+++ b/helm/ocaml/cic_unification/cicUnification.mli
@@ -23,16 +23,8 @@
  * http://cs.unibo.it/helm/.
  *)
 
-exception UnificationFailed
-exception Free
-exception OccurCheck
-
-val delift : 
- Cic.context -> Cic.metasenv -> (Cic.term option) list -> Cic.term -> Cic.term * Cic.metasenv
-
-(* The entry (i,t) in a substitution means that *)
-(* (META i) have been instantiated with t.      *)
-type substitution = (int * Cic.term) list
+exception AssertFailure of string
+exception UnificationFailure of string
 
 (* fo_unif metasenv context t1 t2                *)
 (* unifies [t1] and [t2] in a context [context]. *)
@@ -42,7 +34,7 @@ type substitution = (int * Cic.term) list
 (* withouth first unwinding it.                  *)
 val fo_unif :
   Cic.metasenv -> Cic.context -> Cic.term -> Cic.term ->
-   substitution * Cic.metasenv
+   CicMetaSubst.substitution * Cic.metasenv
 
 (* fo_unif_subst metasenv subst context t1 t2    *)
 (* unifies [t1] and [t2] in a context [context]  *)
@@ -58,28 +50,7 @@ val fo_unif :
 (*CSC: fare un tipo unione Unwinded o ToUnwind e fare gestire la
  cosa all'apply_subst!!!*)
 val fo_unif_subst :
-  substitution -> Cic.context -> Cic.metasenv -> Cic.term -> Cic.term ->
-   substitution * Cic.metasenv
-
-(* unwind_subst metasenv subst                         *)
-(* unwinds [subst] w.r.t. itself.                      *)
-(* It can restrict some metavariable in the [metasenv] *)
-val unwind_subst : Cic.metasenv -> substitution -> substitution * Cic.metasenv
-
-(* apply_subst subst t                     *)
-(* applies the substitution [subst] to [t] *)
-(* [subst] must be already unwinded        *)
-val apply_subst : substitution -> Cic.term -> Cic.term
+  CicMetaSubst.substitution ->
+  Cic.context -> Cic.metasenv -> Cic.term -> Cic.term ->
+   CicMetaSubst.substitution * Cic.metasenv
 
-(* 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 :
- substitution -> (int * int) option -> Cic.term -> Cic.term