fixed a list.nth called on a too short list

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

diff --git a/components/tactics/proofEngineHelpers.mli b/components/tactics/proofEngineHelpers.mli
index 650271d5e6d7ecb515159619f85830b11ff9aa07..1ac3ee707f17c7ef3eca3f7ec284885c9d5107a8 100644 (file)
--- a/components/tactics/proofEngineHelpers.mli
+++ b/components/tactics/proofEngineHelpers.mli
@@ -103,16 +103,6 @@ val locate_in_conjecture:
  ?equality:(Cic.context -> Cic.term -> Cic.term -> bool) ->
   Cic.term -> Cic.conjecture -> (Cic.context * Cic.term) list
 
-(* saturate_term newmeta metasenv context ty goal_arity                       *)
-(* Given a type [ty] (a backbone), it returns its suffix of length            *)
-(* [goal_arity] 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 -> int ->
-  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
 
@@ -121,3 +111,12 @@ val lookup_type: Cic.metasenv -> Cic.context -> string -> int * Cic.term
 val get_name: Cic.context -> int -> string option
 
 val get_rel: Cic.context -> string -> Cic.term option
+
+(* split_with_whd (c, t) takes a type t typed in the context c and returns
+   [(c_0, t_0); (c_1, t_1); ...; (c_n, t_n)], n where t_0 is the conclusion of
+   t and t_i is the premise of t accessed by Rel i in t_0. 
+   Performes a whd on the conclusion before giving up.
+   Each t_i is returned with a context c_i in wich it is typed
+*)
+val split_with_whd: Cic.context * Cic.term -> 
+                    (Cic.context * Cic.term) list * int