X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FproofEngineHelpers.mli;h=859f1f4bac35096d0844f15c7718fef3577be179;hb=e6b28085c97ae7b9bd3f3262b105f6b84f42b047;hp=5cf58999cfb8dd11a16e68ee1f6dcdb70ac08f46;hpb=abd9e5cfa8e7b6923e0664a4813a0a842f5c4e76;p=helm.git

diff --git a/helm/ocaml/tactics/proofEngineHelpers.mli b/helm/ocaml/tactics/proofEngineHelpers.mli
index 5cf58999c..859f1f4ba 100644
--- a/helm/ocaml/tactics/proofEngineHelpers.mli
+++ b/helm/ocaml/tactics/proofEngineHelpers.mli
@@ -23,6 +23,8 @@
  * http://cs.unibo.it/helm/.
  *)
 
+exception Bad_pattern of string
+
 (* Returns the first meta whose number is above the *)
 (* number of the higher meta.                       *)
 val new_meta_of_proof : proof:ProofEngineTypes.proof -> int
@@ -41,10 +43,72 @@ val subst_meta_and_metasenv_in_proof :
 val compare_metasenvs :
   oldmetasenv:Cic.metasenv -> newmetasenv:Cic.metasenv -> int list
 
-(** Finds the _pointers_ to subterms that are alpha-equivalent to wanted in t.
- * wanted is properly lifted when binders are crossed *)
-val find_subterms : 
-  eq:(Cic.term -> Cic.term -> bool) ->
-  wanted:Cic.term -> Cic.term -> 
-    Cic.term list
+
+(** { Patterns }
+ * A pattern is a Cic term in which Cic.Implicit terms annotated with `Hole
+ * appears *)
+
+(** create a pattern from a term and a list of subterms.
+* the pattern is granted to have a ? for every subterm that has no selected
+* subterms
+* @param equality equality function used while walking the term. Defaults to
+* physical equality (==) *)
+val pattern_of:
+ ?equality:(Cic.term -> Cic.term -> bool) -> term:Cic.term -> Cic.term list ->
+   Cic.term
+
+
+(** select metasenv conjecture pattern
+* select all subterms of [conjecture] matching [pattern].
+* It returns the set of matched terms (that can be compared using physical
+* equality to the subterms of [conjecture]) together with their contexts.
+* The representation of the set mimics the conjecture type (but for the id):
+* a list of (possibly removed) hypothesis (without their names) together with
+* the list of its matched subterms (and their contexts) + the list of matched
+* subterms of the conclusion with their context. Note: in the result the list
+* of hypotheses * has an entry for each entry in the context and in the same
+* order. Of course the list of terms (with their context) associated to one
+* hypothesis may be empty. *)
+val select:
+ metasenv:Cic.metasenv ->
+ ugraph:CicUniv.universe_graph ->
+ conjecture:Cic.conjecture ->
+ pattern:ProofEngineTypes.pattern ->
+  Cic.substitution * Cic.metasenv * CicUniv.universe_graph *
+  [ `Decl of (Cic.context * Cic.term) list
+  | `Def of (Cic.context * Cic.term) list * (Cic.context * Cic.term) list option
+  ] option list *
+  (Cic.context * Cic.term) list
+
+(** locate_in_term equality what where context
+* [what] must match a subterm of [where] according to [equality]
+* It returns the matched terms together with their contexts in [where]
+* [equality] defaults to physical equality
+* [context] must be the context of [where]
+*)
+val locate_in_term:
+ ?equality:(Cic.term -> Cic.term -> bool) -> Cic.term -> where:Cic.term ->
+  Cic.context -> (Cic.context * Cic.term) list
+
+(** locate_in_term equality what where context
+* [what] must match a subterm of [where] according to [equality]
+* It returns the matched terms together with their contexts in [where]
+* [equality] defaults to physical equality
+* [context] must be the context of [where]
+*)
+val locate_in_conjecture:
+ ?equality:(Cic.term -> Cic.term -> bool) -> Cic.term -> Cic.conjecture ->
+  (Cic.context * Cic.term) list
+
+(* saturate_term newmeta metasenv context ty                                  *)
+(* Given a type [ty] (a backbone), it returns its head and a new metasenv in  *)
+(* which there is new a META for each hypothesis, a list of arguments for the *)
+(* new applications and the index of the last new META introduced. The nth    *)
+(* argument in the list of arguments is just the nth new META.                *)
+val saturate_term:
+ int -> Cic.metasenv -> Cic.context -> Cic.term ->
+  Cic.term * Cic.metasenv * Cic.term list * int
+
+(* returns the index and the type of a premise in a context *)
+val lookup_type: Cic.metasenv -> Cic.context -> string -> int * Cic.term