unification completed

[helm.git] / helm / software / components / lexicon / lexiconEngine.ml

diff --git a/helm/software/components/lexicon/lexiconEngine.ml b/helm/software/components/lexicon/lexiconEngine.ml
index aadb3ddf2ad02949f3a9769900a2dddce59ae198..8a51e9523055fe51326a5be45372ba53fdbb6495 100644 (file)
--- a/helm/software/components/lexicon/lexiconEngine.ml
+++ b/helm/software/components/lexicon/lexiconEngine.ml
@@ -51,7 +51,12 @@ let add_lexicon_content cmds status =
   let content = status.lexicon_content_rev in
   let content' =
     List.fold_right
-     (fun cmd acc -> cmd :: (List.filter ((<>) cmd) acc))
+     (fun cmd acc -> 
+        match cmd with
+        | LexiconAst.Alias _ 
+        | LexiconAst.Include _ 
+        | LexiconAst.Notation _ -> cmd :: (List.filter ((<>) cmd) acc)
+        | LexiconAst.Interpretation _ -> if List.exists ((=) cmd) acc then acc else cmd::acc)
      cmds content
   in
 (*   prerr_endline ("new lexicon content: " ^ String.concat " " (List.map
@@ -156,12 +161,18 @@ let rec eval_command ?(mode=LexiconAst.WithPreferences) status cmd =
   | LexiconAst.Interpretation (_, dsc, (symbol, _), _) as stm ->
       let status = add_lexicon_content [stm] status in
       let diff =
-       [DisambiguateTypes.Symbol (symbol, 0),
-         DisambiguateChoices.lookup_symbol_by_dsc symbol dsc]
+       try
+        [DisambiguateTypes.Symbol (symbol, 0),
+          DisambiguateChoices.lookup_symbol_by_dsc symbol dsc]
+       with
+        DisambiguateChoices.Choice_not_found msg ->
+          prerr_endline (Lazy.force msg);
+          assert false
       in
       let status = set_proof_aliases mode status diff in
       status
-  | LexiconAst.Notation _ as stm -> add_lexicon_content [stm] status
+  | LexiconAst.Notation _ as stm ->
+      add_lexicon_content [stm] status
 
 let eval_command = eval_command ?mode:None