From 921ea3983d45051ae85b0e20bf13de2eff38e53e Mon Sep 17 00:00:00 2001
From: Emilio Jesus Gallego Arias
Date: Wed, 8 Feb 2017 18:13:25 +0100
Subject: [pp] Remove uses of expensive string_of_ppcmds.

In general we want to avoid this as much as we can, as it will need to
make choices regarding the output backend (width, etc...) and it is
expensive. It is better to serve the printing backends the pretty
print document itself.
---
 stm/stm.ml | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

(limited to 'stm')

diff --git a/stm/stm.ml b/stm/stm.ml
index ee142b2930..b9dbb78917 100644
--- a/stm/stm.ml
+++ b/stm/stm.ml
@@ -6,11 +6,14 @@
 (*         *       GNU Lesser General Public License Version 2.1        *)
 (************************************************************************)
 
-let stm_pr_err s = Printf.eprintf "%s] %s\n" (System.process_id ()) s; flush stderr
+let stm_pr_err s  = Printf.eprintf "%s] %s\n"     (System.process_id ()) s; flush stderr
+let stm_pp_err pp = Format.eprintf "%s] @[%a@]\n" (System.process_id ()) Pp.pp_with pp; flush stderr
 
 let stm_prerr_endline s = if false then begin stm_pr_err (s ()) end else ()
 let stm_prerr_debug s = if !Flags.debug then begin stm_pr_err (s ()) end else ()
 
+let stm_pperr_endline s = if false then begin stm_pp_err (s ()) end else ()
+
 open Vernacexpr
 open CErrors
 open Pp
@@ -994,11 +997,11 @@ let stm_vernac_interp ?proof id ?route { verbose; loc; expr } =
   in
   let aux_interp cmd =
   if is_filtered_command cmd then
-    stm_prerr_endline (fun () -> "ignoring " ^ Pp.string_of_ppcmds(pr_vernac expr))
+    stm_pperr_endline Pp.(fun () -> str "ignoring " ++ pr_vernac expr)
   else match cmd with
   | VernacShow ShowScript -> ShowScript.show_script ()
   | expr ->
-    stm_prerr_endline (fun () -> "interpreting " ^ Pp.string_of_ppcmds(pr_vernac expr));
+    stm_pperr_endline Pp.(fun () -> str "interpreting " ++ pr_vernac expr);
     try Vernacentries.interp ?verbosely:(Some verbose) ?proof (loc, expr)
     with e ->
       let e = CErrors.push e in
@@ -1431,11 +1434,10 @@ end = struct (* {{{ *)
           | Some (safe, err) -> err, safe
           | None -> Stateid.dummy, Stateid.dummy in
         let e_msg = iprint (e, info) in
-        stm_prerr_endline (fun () -> "failed with the following exception:");
-        stm_prerr_endline (fun () -> string_of_ppcmds e_msg);
+        stm_pperr_endline Pp.(fun () -> str "failed with the following exception: " ++ fnl () ++ e_msg);
         let e_safe_states = List.filter State.is_cached_and_valid my_states in
         RespError { e_error_at; e_safe_id; e_msg; e_safe_states }
-  
+
   let perform_states query =
     if query = [] then [] else
     let is_tac e = match classify_vernac e with
@@ -1880,10 +1882,10 @@ end = struct (* {{{ *)
           let open Notations in
           try
             let pt, uc = Future.join f in
-            stm_prerr_endline (fun () -> string_of_ppcmds(hov 0 (
+            stm_pperr_endline (fun () -> hov 0 (
               str"g=" ++ int (Evar.repr gid) ++ spc () ++
               str"t=" ++ (Printer.pr_constr pt) ++ spc () ++
-              str"uc=" ++ Evd.pr_evar_universe_context uc)));
+              str"uc=" ++ Evd.pr_evar_universe_context uc));
             (if abstract then Tactics.tclABSTRACT None else (fun x -> x))
               (V82.tactic (Refiner.tclPUSHEVARUNIVCONTEXT uc) <*>
               Tactics.exact_no_check pt)
@@ -2514,7 +2516,7 @@ let reset_task_queue = Slaves.reset_task_queue
 (* Document building *)
 let process_transaction ?(newtip=Stateid.fresh ()) ~tty
   ({ verbose; loc; expr } as x) c =
-  stm_prerr_endline (fun () -> "{{{ processing: "^ string_of_ppcmds (pr_ast x));
+  stm_pperr_endline (fun () -> str "{{{ processing: " ++ pr_ast x);
   let vcs = VCS.backup () in
   try
     let head = VCS.current_branch () in
-- 
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