X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fcic_transformations%2FcicAst.ml;h=f7392fa3ac34bdfe8c4423902cd54a4c4c15fb06;hb=5325734bc2e4927ed7ec146e35a6f0f2b49f50c1;hp=b992a916c28371a82def85cc21e1ff10eadbf39d;hpb=b029556cbcecb852dfc9cf25801f3dcc0bb762bb;p=helm.git

diff --git a/helm/ocaml/cic_transformations/cicAst.ml b/helm/ocaml/cic_transformations/cicAst.ml
index b992a916c..f7392fa3a 100644
--- a/helm/ocaml/cic_transformations/cicAst.ml
+++ b/helm/ocaml/cic_transformations/cicAst.ml
@@ -23,66 +23,8 @@
  * http://helm.cs.unibo.it/
  *)
 
-  (* when an 'ident option is None, the default is to apply the tactic
-  to the current goal *)
-
-type reduction_kind = [ `Reduce | `Simpl | `Whd ]
-
-type 'term pattern =
-  | Pattern of 'term
-
 type location = int * int
 
-type ('term, 'ident) tactic =
-  | LocatedTactic of location * ('term, 'ident) tactic
-
-  | Absurd
-  | Apply of 'term
-  | Assumption
-  | Change of 'term * 'term * 'ident option (* what, with what, where *)
-  | Change_pattern of 'term pattern * 'term * 'ident option
-      (* what, with what, where *)
-  | Contradiction
-  | Cut of 'term
-  | Decompose of 'ident * 'ident list (* which hypothesis, which principles *)
-  | Discriminate of 'ident
-  | Elim of 'term * 'term option (* what to elim, which principle to use *)
-  | ElimType of 'term
-  | Exact of 'term
-  | Exists
-  | Fold of reduction_kind * 'term
-  | Fourier
-  | Injection of 'ident
-  | Intros of int option
-  | Left
-  | LetIn of 'term * 'ident (* TODO clashes with term below *)
-  | Named_intros of 'ident list
-  | Reduce of reduction_kind * 'term pattern * 'ident option (* what, where *)
-  | Reflexivity
-  | Replace of 'term * 'term (* what, with what *)
-  | Replace_pattern of 'term pattern * 'term
-  | RewriteLeft of 'term * 'ident option
-  | RewriteRight of 'term * 'ident option
-  | Right
-  | Ring
-  | Split
-  | Symmetry
-  | Transitivity of 'term
-
-type 'tactic tactical =
-  | LocatedTactical of location * 'tactic tactical
-
-  | Fail
-  | For of int * 'tactic tactical
-  | IdTac
-  | Repeat of 'tactic tactical
-  | Seq of 'tactic tactical list (* sequential composition *)
-  | Tactic of 'tactic
-  | Then of 'tactic tactical * 'tactic tactical list
-  | Tries of 'tactic tactical list
-      (* try a sequence of tacticals until one succeeds, fail otherwise *)
-  | Try of 'tactic tactical (* try a tactical and mask failures *)
-
 type binder_kind = [ `Lambda | `Pi | `Exists | `Forall ]
 type induction_kind = [ `Inductive | `CoInductive ]
 type sort_kind = [ `Prop | `Set | `Type | `CProp ]
@@ -102,7 +44,10 @@ type term =
   | LetIn of capture_variable * term * term  (* name, body, where *)
   | LetRec of induction_kind * (capture_variable * term * int) list * term
       (* (name, body, decreasing argument) list, where *)
-  | Ident of string * subst list  (* literal, substitutions *)
+  | Ident of string * subst list option
+      (* literal, substitutions.
+      * Some [] -> user has given an empty explicit substitution list 
+      * None -> user has given no explicit substitution list *)
   | Implicit
   | Meta of int * meta_subst list
   | Num of string * int (* literal, instance *)