New tactic unfold.

[helm.git] / helm / ocaml / tactics / proofEngineHelpers.mli

diff --git a/helm/ocaml/tactics/proofEngineHelpers.mli b/helm/ocaml/tactics/proofEngineHelpers.mli
index f71574aef4bf67d560b8df8a0a6bee6b7e469f9f..574a9441318fd8c03f909dfe12d06011ff5ee563 100644 (file)
--- a/helm/ocaml/tactics/proofEngineHelpers.mli
+++ b/helm/ocaml/tactics/proofEngineHelpers.mli
@@ -80,10 +80,29 @@ val select:
   ] option list *
   (Cic.context * Cic.term) list
 
-(** locate_in_conjecture what where
-* [what] must be a physical pointer to a subterm of [where]
-* It returns the context of [what] in [where] *)
-val locate_in_conjecture: Cic.term -> Cic.conjecture -> Cic.context
+exception TermNotFound
+exception TermFoundMultipleTimes
+
+(** locate_in_term equality what where context
+* [what] must match a subterm of [where] according to [equality]
+* It returns the matched term together with its context in [where]
+* [equality] defaults to physical equality
+* [context] must be the context of [where]
+* It may raise TermNotFound or TermFoundMultipleTimes
+*)
+val locate_in_term:
+ ?equality:(Cic.term -> Cic.term -> bool) -> Cic.term -> where:Cic.term ->
+  Cic.context -> Cic.context * Cic.term
+
+(** locate_in_conjecture equality what where
+* [what] must match a subterm of [where] according to [equality]
+* It returns the context of [what] in [where]
+* [equality] defaults to physical equality
+* It may raise TermNotFound or TermFoundMultipleTimes
+*)
+val locate_in_conjecture:
+ ?equality:(Cic.term -> Cic.term -> bool) -> Cic.term -> Cic.conjecture ->
+  Cic.context
 
 (* saturate_term newmeta metasenv context ty                                  *)
 (* Given a type [ty] (a backbone), it returns its head and a new metasenv in  *)