snapshort

[helm.git] / helm / ocaml / cic_notation / cicNotationUtil.ml

diff --git a/helm/ocaml/cic_notation/cicNotationUtil.ml b/helm/ocaml/cic_notation/cicNotationUtil.ml
index 18e04640a48658bc0ab970dedebe94ec7e0f54b3..52ac0ab67ef836d51c95a3dc1eb811b1f22ff89e 100644 (file)
--- a/helm/ocaml/cic_notation/cicNotationUtil.ml
+++ b/helm/ocaml/cic_notation/cicNotationUtil.ml
@@ -214,3 +214,96 @@ let rec strip_attributes t =
   in
   visit_ast ~special_k strip_attributes t
 
+let meta_names_of_term term =
+  let rec names = ref [] in
+  let add_name n =
+    if List.mem n !names then ()
+    else names := n :: !names
+  in
+  let rec aux = function
+    | AttributedTerm (_, term) -> aux term
+    | Appl terms -> List.iter aux terms
+    | Binder (_, _, body) -> aux body
+    | Case (term, indty, outty_opt, patterns) ->
+        aux term ;
+        aux_opt outty_opt ;
+        List.iter aux_branch patterns
+    | LetIn (_, t1, t2) ->
+        aux t1 ;
+        aux t2
+    | LetRec (_, definitions, body) ->
+        List.iter aux_definition definitions ;
+        aux body
+    | Uri (_, Some substs) -> aux_substs substs
+    | Ident (_, Some substs) -> aux_substs substs
+    | Meta (_, substs) -> aux_meta_substs substs
+
+    | Implicit
+    | Ident _
+    | Num _
+    | Sort _
+    | Symbol _
+    | Uri _
+    | UserInput -> ()
+
+    | Magic magic -> aux_magic magic
+    | Variable var -> aux_variable var
+
+    | _ -> assert false
+  and aux_opt = function
+    | Some term -> aux term
+    | None -> ()
+  and aux_capture_var (_, ty_opt) = aux_opt ty_opt
+  and aux_branch (pattern, term) =
+    aux_pattern pattern ;
+    aux term
+  and aux_pattern (head, vars) = 
+    List.iter aux_capture_var vars
+  and aux_definition (var, term, i) =
+    aux_capture_var var ;
+    aux term
+  and aux_substs substs = List.iter (fun (_, term) -> aux term) substs
+  and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
+  and aux_variable = function
+    | NumVar name -> add_name name
+    | IdentVar name -> add_name name
+    | TermVar name -> add_name name
+    | FreshVar _ -> ()
+    | Ascription _ -> assert false
+  and aux_magic = function
+    | Default (t1, t2)
+    | Fold (_, t1, _, t2) ->
+        aux t1 ;
+        aux t2
+    | _ -> assert false
+  in
+  aux term ;
+  !names
+
+let rectangular matrix =
+  let columns = Array.length matrix.(0) in
+  try
+    Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
+    true
+  with Exit -> false
+
+let ncombine ll =
+  let matrix = Array.of_list (List.map Array.of_list ll) in
+  assert (rectangular matrix);
+  let rows = Array.length matrix in
+  let columns = Array.length matrix.(0) in
+  let lists = ref [] in
+  for j = 0 to columns - 1 do
+    let l = ref [] in
+    for i = 0 to rows - 1 do
+      l := matrix.(i).(j) :: !l
+    done;
+    lists := List.rev !l :: !lists
+  done;
+  List.rev !lists
+
+let string_of_literal = function
+  | `Symbol s
+  | `Keyword s
+  | `Number s -> s
+