Remove lwt_ppx dependency

Makefile.options

@@ -41,10 +41,10 @@ TEMPLATE_NAME := none.pgocaml
 
 # OCamlfind packages for the server
 SERVER_PACKAGES := calendar
-SERVER_PPX_PACKAGES := lwt_ppx js_of_ocaml-ppx_deriving_json
+SERVER_PPX_PACKAGES := js_of_ocaml-ppx_deriving_json
 # OCamlfind packages for the client
 CLIENT_PACKAGES := calendar js_of_ocaml js_of_ocaml-lwt
-CLIENT_PPX_PACKAGES := js_of_ocaml-ppx lwt_ppx js_of_ocaml-ppx_deriving_json
+CLIENT_PPX_PACKAGES := js_of_ocaml-ppx js_of_ocaml-ppx_deriving_json
 
 # Debug package (yes/no): Debugging info in compilation
 DEBUG := yes

src/widgets/ot_calendar.eliom

@@ -33,6 +33,7 @@ type button_labels =
 
 [%%client.start]
 
+open Lwt.Syntax
 open Js_of_ocaml
 open Js_of_ocaml_lwt
 
@@ -344,7 +345,7 @@ let attach_events ?action ?(click_non_highlighted = false) ?update ~intl ~period
       | Some action ->
           fun _ r ->
             update_classes cal zero d;
-            let%lwt _ = action y m dom in
+            let* _ = action y m dom in
             Lwt.return_unit
       | None -> fun _ r -> update_classes cal zero d; Lwt.return_unit
     in
@@ -369,7 +370,7 @@ let attach_events_lwt ?action ?click_non_highlighted ~intl ~period d cal
   let f () =
     let m = CalendarLib.Date.(month d |> int_of_month)
     and y = CalendarLib.Date.year d in
-    let%lwt highlight = highlight y m in
+    let* highlight = highlight y m in
     attach_events ?action ?click_non_highlighted ~intl ~period d cal highlight;
     Lwt.return_unit
   in

src/widgets/ot_carousel.eliom

@@ -35,9 +35,11 @@
 *)
 
 open%client Js_of_ocaml
+
 [%%client open Js_of_ocaml_lwt]
 [%%shared open Eliom_content.Html]
 [%%shared open Eliom_content.Html.F]
+[%%shared open Lwt.Syntax]
 
 let%client clX = Ot_swipe.clX
 let%client clY = Ot_swipe.clY
@@ -181,7 +183,7 @@ let%shared make ?(a = []) ?(vertical = false) ?(position = 0)
            max 1 (truncate (float (width_carousel + 1) /. float width_element))
        in
        Lwt.async (fun () ->
-         let%lwt () = Ot_nodeready.nodeready d2' in
+         let* () = Ot_nodeready.nodeready d2' in
          ~%set_nb_visible_elements (comp_nb_visible_elements ());
          Lwt.return_unit);
        let maxi () = ~%maxi - React.S.value ~%nb_visible_elements + 1 in
@@ -294,10 +296,10 @@ let%shared make ?(a = []) ?(vertical = false) ?(position = 0)
          React.Step.execute step;
          set_active ();
          Lwt.async (fun () ->
-           let%lwt () =
+           let* () =
              if move
              then
-               let%lwt _ = Lwt_js_events.transitionend d2' in
+               let* _ = Lwt_js_events.transitionend d2' in
                Lwt.return_unit
              else Lwt.return_unit
            in
@@ -318,7 +320,7 @@ let%shared make ?(a = []) ?(vertical = false) ?(position = 0)
               (fun _ -> ~%set_nb_visible_elements (comp_nb_visible_elements ()))
               (if vertical then Ot_size.height else Ot_size.width));
        Lwt.async (fun () ->
-         let%lwt () = Ot_nodeready.nodeready d2' in
+         let* () = Ot_nodeready.nodeready d2' in
          set_position ~%position; add_transition d2'; Lwt.return_unit);
        let perform_animation a =
          ~%set_nb_visible_elements (comp_nb_visible_elements ());
@@ -335,7 +337,7 @@ let%shared make ?(a = []) ?(vertical = false) ?(position = 0)
                if not !animation_frame_requested
                then (
                  animation_frame_requested := true;
-                 let%lwt () = Lwt_js_events.request_animation_frame () in
+                 let* () = Lwt_js_events.request_animation_frame () in
                  animation_frame_requested := false;
                  (match !action with
                  | `Move (delta, width_element) ->
@@ -569,25 +571,26 @@ let%client set_default_fail f =
       :> exn -> Html_types.div_content Eliom_content.Html.elt)
 
 let%shared generate_content generator =
-  try%lwt Eliom_shared.Value.local generator ()
-  with e -> Lwt.return (default_fail e)
+  Lwt.catch
+    (fun () -> Eliom_shared.Value.local generator ())
+    (fun e -> Lwt.return (default_fail e))
 
 (* on the client side we generate the contents of the initially visible page
    asynchronously so the tabs will be rendered right away *)
 let%client generate_initial_contents ~spinner sleeper gen =
   let s = spinner () in
   ( Lwt.async @@ fun () ->
-    let%lwt contents = generate_content gen in
+    let* contents = generate_content gen in
     (* wait until DOM elements are created before attempting to replace them *)
-    let%lwt parent = sleeper in
+    let* parent = sleeper in
     ignore @@ To_dom.of_element parent;
     Manip.replaceSelf s contents;
     Lwt.return () );
   Lwt.return (s, ref @@ None)
 
 (* on the server side we generate all the visible contents right away *)
 let%server generate_initial_contents ~spinner:_ _ gen =
-  let%lwt contents = generate_content gen in
+  let* contents = generate_content gen in
   Lwt.return (contents, ref @@ None)
 
 let%shared make_lazy ?a ?vertical ?(position = 0) ?transition_duration ?inertia
@@ -609,7 +612,7 @@ let%shared make_lazy ?a ?vertical ?(position = 0) ?transition_duration ?inertia
       let s = spinner () in
       s, ref @@ Some (s, gen)
   in
-  let%lwt contents, spinners_and_generators =
+  let* contents, spinners_and_generators =
     Lwt.map List.split
     @@ Lwt_list.map_s (fun x -> x)
     @@ List.mapi mk_contents gen_contents
@@ -639,7 +642,7 @@ let%shared make_lazy ?a ?vertical ?(position = 0) ?transition_duration ?inertia
                 match !spinner_and_generator with
                 | Some (spinner, gen_content) ->
                     spinner_and_generator := None;
-                    let%lwt content = generate_content gen_content in
+                    let* content = generate_content gen_content in
                     Manip.replaceSelf spinner content;
                     Lwt.return_unit
                 | None -> Lwt.return ())
@@ -728,7 +731,7 @@ let%shared ribbon ?(a = [])
        in
        let curleft, set_curleft = React.S.create initial_gap in
        Lwt.async (fun () ->
-         let%lwt () = Ot_nodeready.nodeready container' in
+         let* () = Ot_nodeready.nodeready container' in
          (* Ribbon position: *)
          set_containerwidth container'##.offsetWidth;
          Ot_noderesize.noderesize (Ot_noderesize.attach container') (fun () ->
@@ -749,7 +752,7 @@ let%shared ribbon ?(a = [])
            that runs on window resizing. So we make sure the ribbon code runs
            AFTER it has been placed into the fixed container by Ot_sticky. *)
                 Lwt.async @@ fun () ->
-                let%lwt _ = Lwt_js.sleep 0.05 in
+                let* _ = Lwt_js.sleep 0.05 in
                 set_containerwidth container'##.offsetWidth;
                 Lwt.return_unit);
          (* Changing the position of the ribbon when the carousel position
@@ -880,8 +883,8 @@ let%shared ribbon ?(a = [])
          | _ -> ());
          Lwt.return_unit);
        Lwt.async (fun () ->
-         let%lwt () = Ot_nodeready.nodeready container' in
-         let%lwt () = Lwt_js_events.request_animation_frame () in
+         let* () = Ot_nodeready.nodeready container' in
+         let* () = Lwt_js_events.request_animation_frame () in
          add_transition the_ul';
          Eliom_lib.Option.iter add_transition cursor_elt';
          Lwt.return_unit);

src/widgets/ot_drawer.eliom

@@ -23,6 +23,7 @@ open Eliom_content.Html]
 
 [%%shared open Eliom_content.Html.F]
 open%client Js_of_ocaml
+open%client Lwt.Syntax
 [%%client open Js_of_ocaml_lwt]
 type%client status = Stopped | Start | Aborted | In_progress
 
@@ -40,7 +41,7 @@ let%client clY ev =
 
 let%client bind_click_outside bckgrnd elt close =
   Lwt.async (fun () ->
-    let%lwt ev =
+    let* ev =
       Ot_lib.click_outside ~use_capture:true
         ~inside:(To_dom.of_element bckgrnd)
         (To_dom.of_element elt)
@@ -130,7 +131,7 @@ let%shared drawer ?(a = []) ?(position = `Left) ?(opened = false)
          add_class ~%bckgrnd "closing";
          Lwt.cancel !(~%touch_thread);
          Lwt_js_events.async (fun () ->
-           let%lwt _ = Lwt_js_events.transitionend (To_dom.of_element ~%d) in
+           let* _ = Lwt_js_events.transitionend (To_dom.of_element ~%d) in
            remove_class ~%bckgrnd "closing";
            Eliom_lib.Option.iter (fun f -> f ()) ~%onclose;
            Lwt.return_unit)
@@ -148,13 +149,13 @@ let%shared drawer ?(a = []) ?(position = `Left) ?(opened = false)
          add_class ~%bckgrnd "opening";
          Lwt.cancel !(~%touch_thread);
          Lwt.async (fun () ->
-           let%lwt bind_touch = fst ~%bind_touch in
+           let* bind_touch = fst ~%bind_touch in
            bind_touch (); Lwt.return_unit);
          bind_click_outside ~%bckgrnd ~%d ~%close;
          Eliom_client.Page_status.onactive ~stop:(fst ~%stop_open_event)
            (fun () -> html_ManipClass_add "ot-drawer-open");
          Lwt_js_events.async (fun () ->
-           let%lwt _ = Lwt_js_events.transitionend (To_dom.of_element ~%d) in
+           let* _ = Lwt_js_events.transitionend (To_dom.of_element ~%d) in
            remove_class ~%bckgrnd "opening";
            Lwt.return_unit)
        : unit -> unit)]
@@ -205,7 +206,7 @@ let%shared drawer ?(a = []) ?(position = `Left) ?(opened = false)
              if not !animation_frame_requested
              then (
                animation_frame_requested := true;
-               let%lwt () = Lwt_js_events.request_animation_frame () in
+               let* () = Lwt_js_events.request_animation_frame () in
                animation_frame_requested := false;
                (match !action with
                | `Move delta ->
@@ -225,7 +226,7 @@ let%shared drawer ?(a = []) ?(position = `Left) ?(opened = false)
                    (Js.Unsafe.coerce dr##.style)##.webkitTransform
                    := Js.string "";
                    Lwt.async (fun () ->
-                     let%lwt _ = Lwt_js_events.transitionend dr in
+                     let* _ = Lwt_js_events.transitionend dr in
                      Manip.Class.remove ~%bckgrnd "ot-swiping";
                      Lwt.return_unit);
                    cl ()
@@ -234,7 +235,7 @@ let%shared drawer ?(a = []) ?(position = `Left) ?(opened = false)
                    (Js.Unsafe.coerce dr##.style)##.webkitTransform
                    := Js.string "";
                    Lwt.async (fun () ->
-                     let%lwt _ = Lwt_js_events.transitionend dr in
+                     let* _ = Lwt_js_events.transitionend dr in
                      Manip.Class.remove ~%bckgrnd "ot-swiping";
                      Lwt.return_unit)
                | `Abort ->
@@ -324,36 +325,40 @@ let%shared drawer ?(a = []) ?(position = `Left) ?(opened = false)
            status := Start;
            startx := clX ev;
            starty := clY ev;
-           let%lwt () = onpan ev a in
+           let* () = onpan ev a in
            (* Lwt.pick and Lwt_js_events.touch*** seem to behave oddly.
            This wrapping is an attempt to understand why. *)
            let a =
-             try%lwt Lwt_js_events.touchmoves bckgrnd' onpan with
-             | Lwt.Canceled -> Lwt.return_unit
-             | e ->
-                 let s = Printexc.to_string e in
-                 Printf.printf "Ot_drawer>touchmoves>exception: %s\n%!" s;
-                 Lwt.fail e
+             Lwt.catch
+               (fun () -> Lwt_js_events.touchmoves bckgrnd' onpan)
+               (function
+                 | Lwt.Canceled -> Lwt.return_unit
+                 | e ->
+                     let s = Printexc.to_string e in
+                     Printf.printf "Ot_drawer>touchmoves>exception: %s\n%!" s;
+                     Lwt.fail e)
            and b =
-             try%lwt
-               let%lwt ev = Lwt_js_events.touchend bckgrnd' in
-               onpanend ev ()
-             with
-             | Lwt.Canceled -> Lwt.return_unit
-             | e ->
-                 let s = Printexc.to_string e in
-                 Printf.printf "Ot_drawer>touchend>exception: %s\n%!" s;
-                 Lwt.fail e
+             Lwt.catch
+               (fun () ->
+                  let* ev = Lwt_js_events.touchend bckgrnd' in
+                  onpanend ev ())
+               (function
+                 | Lwt.Canceled -> Lwt.return_unit
+                 | e ->
+                     let s = Printexc.to_string e in
+                     Printf.printf "Ot_drawer>touchend>exception: %s\n%!" s;
+                     Lwt.fail e)
            and c =
-             try%lwt
-               let%lwt ev = Lwt_js_events.touchcancel bckgrnd' in
-               onpanend ev ()
-             with
-             | Lwt.Canceled -> Lwt.return_unit
-             | e ->
-                 let s = Printexc.to_string e in
-                 Printf.printf "Ot_drawer>touchcancel>exception: %s\n%!" s;
-                 Lwt.fail e
+             Lwt.catch
+               (fun () ->
+                  let* ev = Lwt_js_events.touchcancel bckgrnd' in
+                  onpanend ev ())
+               (function
+                 | Lwt.Canceled -> Lwt.return_unit
+                 | e ->
+                     let s = Printexc.to_string e in
+                     Printf.printf "Ot_drawer>touchcancel>exception: %s\n%!" s;
+                     Lwt.fail e)
            in
            Lwt.pick [a; b; c]
          in

src/widgets/ot_lib.eliom

@@ -19,7 +19,8 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  *)
-open Js_of_ocaml]
+open Js_of_ocaml
+open Lwt.Syntax]
 
 [%%client open Js_of_ocaml_lwt]
 
@@ -46,7 +47,7 @@ let%client window_scrolls ?(ios_html_scroll_hack = false) ?use_capture handler =
       if ios_html_scroll_hack
       then
         let rec loop () =
-          let%lwt e =
+          let* e =
             Lwt.pick
               (List.map
                  (* We listen to several elements because scroll events are
@@ -59,12 +60,15 @@ let%client window_scrolls ?(ios_html_scroll_hack = false) ?use_capture handler =
           in
           let continue = ref true in
           let w =
-            try%lwt fst (Lwt.task ())
-            with Lwt.Canceled ->
-              continue := false;
-              Lwt.return_unit
+            Lwt.catch
+              (fun () -> fst (Lwt.task ()))
+              (function
+                | Lwt.Canceled ->
+                    continue := false;
+                    Lwt.return_unit
+                | exc -> Lwt.reraise exc)
           in
-          let%lwt () = handler e w in
+          let* () = handler e w in
           if !continue then loop () else Lwt.return_unit
         in
         loop ()
@@ -91,7 +95,7 @@ let%client rec in_ancestors ~elt ~ancestor =
 let%client rec click_outside ?use_capture
     ?(inside = (Dom_html.document##.body :> Dom_html.element Js.t)) elt
   =
-  let%lwt ev = Lwt_js_events.click ?use_capture inside in
+  let* ev = Lwt_js_events.click ?use_capture inside in
   Js.Opt.case ev##.target
     (fun () -> click_outside ?use_capture elt)
     (fun target ->