* http://cs.unibo.it/helm/.
*)
-(* mk_fresh_name context name typ *)
-(* returns an identifier which is fresh in the context *)
-(* and that resembles [name] as much as possible. *)
-(* [typ] will be the type of the variable *)
-val mk_fresh_name : ProofEngineTypes.mk_fresh_name_type
+exception Bad_pattern of string
(* Returns the first meta whose number is above the *)
(* number of the higher meta. *)
ProofEngineTypes.proof ->
int -> (Cic.term -> Cic.term) -> Cic.metasenv ->
ProofEngineTypes.proof * Cic.metasenv
+
+(* returns the list of goals that are in newmetasenv and were not in
+ oldmetasenv *)
+val compare_metasenvs :
+ oldmetasenv:Cic.metasenv -> newmetasenv:Cic.metasenv -> int 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 ->
+ conjecture:Cic.conjecture ->
+ pattern:ProofEngineTypes.pattern ->
+ [ `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