From 5f64ba6a73cc718d07405dd31c29a90e3f65fbd2 Mon Sep 17 00:00:00 2001
From: ppedrot <ppedrot@85f007b7-540e-0410-9357-904b9bb8a0f7>
Date: Sat, 26 Jan 2013 17:31:26 +0000
Subject: Monadification of coqtop queries in CoqIDE

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16150 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 ide/coqide.ml | 56 +++++++++++++++++++++++++++++++-------------------------
 1 file changed, 31 insertions(+), 25 deletions(-)

(limited to 'ide/coqide.ml')

diff --git a/ide/coqide.ml b/ide/coqide.ml
index d48e7d4a5..bb3114569 100644
--- a/ide/coqide.ml
+++ b/ide/coqide.ml
@@ -474,22 +474,25 @@ end
 
 (** Callbacks for the Navigation menu *)
 
-let update_status h k =
-  let display msg = pop_info (); push_info msg
+let update_status =
+  let display msg = pop_info (); push_info msg in
+  let next = function
+  | Interface.Fail (l, str) ->
+    display "Oops, problem while fetching coq status.";
+    Coq.return ()
+  | Interface.Good status | Interface.Unsafe status ->
+    let path = match status.Interface.status_path with
+      | [] | _ :: [] -> "" (* Drop the topmost level, usually "Top" *)
+      | _ :: l -> " in " ^ String.concat "." l
+    in
+    let name = match status.Interface.status_proofname with
+      | None -> ""
+      | Some n -> ", proving " ^ n
+    in
+    display ("Ready" ^ path ^ name);
+    Coq.return ()
   in
-  Coq.status h (function
-    |Interface.Fail (l, str) ->
-      display "Oops, problem while fetching coq status."; k ()
-    |Interface.Good status | Interface.Unsafe status ->
-      let path = match status.Interface.status_path with
-        | [] | _ :: [] -> "" (* Drop the topmost level, usually "Top" *)
-        | _ :: l -> " in " ^ String.concat "." l
-      in
-      let name = match status.Interface.status_proofname with
-        | None -> ""
-        | Some n -> ", proving " ^ n
-      in
-      display ("Ready" ^ path ^ name); k ())
+  Coq.bind Coq.status next
 
 let find_next_occurrence ~backward =
   (** go to the next occurrence of the current word, forward or backward *)
@@ -507,7 +510,7 @@ let find_next_occurrence ~backward =
 let send_to_coq f =
   let sn = notebook#current_term in
   let info () = Minilib.log ("Coq busy, discarding query") in
-  let f h k = f sn h (fun () -> update_status h k) in
+  let f = Coq.seq (f sn) update_status in
   Coq.try_grab sn.coqtop f info
 
 module Nav = struct
@@ -555,9 +558,10 @@ let print_branches c cases =
   Format.fprintf c "@[match var with@\n%aend@]@."
     (print_list print_branch) cases
 
-let display_match k = function
-  |Interface.Fail _ -> flash_info "Not an inductive type"; k ()
-  |Interface.Good cases |Interface.Unsafe cases ->
+let display_match = function
+  |Interface.Fail _ ->
+    flash_info "Not an inductive type"; Coq.return ()
+  |Interface.Good cases | Interface.Unsafe cases ->
     let text =
       let buf = Buffer.create 1024 in
       let () = print_branches (Format.formatter_of_buffer buf) cases in
@@ -574,12 +578,13 @@ let display_match k = function
       b#move_mark ~where:(i#backward_chars 3) `SEL_BOUND
     end;
     b#delete_mark (`MARK m);
-    k ()
+    Coq.return ()
 
 let match_callback _ =
   let w = get_current_word () in
   let coqtop = notebook#current_term.coqtop in
-  Coq.try_grab coqtop (fun h k -> Coq.mkcases w h (display_match k)) ignore
+  let query = Coq.bind (Coq.mkcases w) display_match in
+  Coq.try_grab coqtop query ignore
 
 (** Queries *)
 
@@ -598,13 +603,14 @@ let searchabout () =
     buf#insert tpe;
     buf#insert "\n";
   in
-  let display_results k r =
+  let display_results r =
     sn.messages#clear;
     List.iter insert (match r with Interface.Good l -> l | _ -> []);
-    k ()
+    Coq.return ()
   in
-  let launch_query h k =
-    Coq.search [Interface.SubType_Pattern word, true] h (display_results k)
+  let launch_query =
+    let search = Coq.search [Interface.SubType_Pattern word, true] in
+    Coq.bind search display_results
   in
   Coq.try_grab sn.coqtop launch_query ignore
 
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