now destruct takes an optional list of term rather than a sigle optional term

[helm.git] / components / extlib / hExtlib.ml

diff --git a/components/extlib/hExtlib.ml b/components/extlib/hExtlib.ml
index d4572789ad55f39795d000fd09192e839cfee02f..24f0dd1967ab3f8711a5538f61058bcc13417fce 100644 (file)
--- a/components/extlib/hExtlib.ml
+++ b/components/extlib/hExtlib.ml
@@ -164,6 +164,17 @@ let list_rev_map_filter f l =
    in 
    aux [] l
 
+let list_rev_map_filter_fold f v l =
+   let rec aux v a = function
+      | []       -> v, a
+      | hd :: tl -> 
+         begin match f v hd with
+           | v, None   -> aux v a tl
+           | v, Some b -> aux v (b :: a) tl 
+         end
+   in 
+   aux v [] l
+
 let list_concat ?(sep = []) =
   let rec aux acc =
     function
@@ -203,11 +214,31 @@ let is_dir fname =
     (Unix.stat fname).Unix.st_kind = Unix.S_DIR
   with Unix.Unix_error _ -> false
 
+let writable_dir path =
+  try
+    let file = path ^ "/prova_matita" in
+    let oc = open_out file in
+    close_out oc;
+    Sys.remove file;
+    true
+  with Sys_error _ -> false
+
+
 let is_regular fname =
   try
     (Unix.stat fname).Unix.st_kind = Unix.S_REG
   with Unix.Unix_error _ -> false
 
+let is_executable fname =
+  try
+    let stat = (Unix.stat fname) in
+    stat.Unix.st_kind = Unix.S_REG &&
+    (stat.Unix.st_perm land 0o001 > 0)
+  with Unix.Unix_error _ -> false
+
+let chmod mode filename =
+   Unix.chmod filename mode
+
 let mkdir path =
   let components = split ~sep:'/' path in
   let rec aux where = function
@@ -216,13 +247,13 @@ let mkdir path =
         let path =
           if where = "" then piece else where ^ "/" ^ piece in
         (try
-          Unix.mkdir path 0o755
+          Unix.mkdir path 0o755; chmod 0o2775 path 
         with 
         | Unix.Unix_error (Unix.EEXIST,_,_) -> ()
         | Unix.Unix_error (e,_,_) -> 
             raise 
               (Failure 
-                ("Unix.mkdir " ^ path ^ " 0o755 :" ^ (Unix.error_message e))));
+                ("Unix.mkdir " ^ path ^ " 0o2775 :" ^ (Unix.error_message e))));
         aux path tl
   in
   let where = if path.[0] = '/' then "/" else "" in
@@ -254,7 +285,8 @@ let input_all ic =
 let output_file ~filename ~text = 
   let oc = open_out filename in
   output_string oc text;
-  close_out oc
+  close_out oc;
+  chmod 0o664 filename
 
 let blank_split s =
   let len = String.length s in
@@ -371,30 +403,20 @@ let finally at_end f arg =
 
 (** {2 Localized exceptions } *)
 
-exception Localized of Token.flocation * exn
+exception Localized of Stdpp.location * exn
 
-let loc_of_floc = function
-  | { Lexing.pos_cnum = loc_begin }, { Lexing.pos_cnum = loc_end } ->
-      (loc_begin, loc_end)
+let loc_of_floc floc = Stdpp.first_pos floc, Stdpp.last_pos floc;;
 
 let floc_of_loc (loc_begin, loc_end) =
-  let floc_begin =
-    { Lexing.pos_fname = ""; Lexing.pos_lnum = -1; Lexing.pos_bol = -1;
-      Lexing.pos_cnum = loc_begin }
-  in
-  let floc_end = { floc_begin with Lexing.pos_cnum = loc_end } in
-  (floc_begin, floc_end)
+ Stdpp.make_loc (loc_begin, loc_end)
 
 let dummy_floc = floc_of_loc (-1, -1)
 
 let raise_localized_exception ~offset floc exn =
- let (x, y) = loc_of_floc floc in
+ let x, y = loc_of_floc floc in
  let x = offset + x in
  let y = offset + y in
- let flocb,floce = floc in
- let floc =
-   { flocb with Lexing.pos_cnum = x }, { floce with Lexing.pos_cnum = y }
- in
+ let floc = floc_of_loc (x,y) in
   raise (Localized (floc, exn))
 
 let estimate_size x =