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(*
Copyright © 2011 MLstate
This file is part of OPA.
OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.
OPA is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
more details.
You should have received a copy of the GNU Affero General Public License
along with OPA. If not, see <http://www.gnu.org/licenses/>.
*)
(* CF mli *)
(* depends *)
module String = Base.String
(* refactoring in progress *)
(* alias *)
module FCons = Flat_Common.FCons
module ServerLib = Flat_Common.ServerLib
(* -- *)
type vtable = Flat_Field.label list
let table : (string list, Flat_Common.expr) Hashtbl.t = Hashtbl.create 1024
let reset () = Hashtbl.clear table
let vtable ( vtable : vtable ) =
try
Flat_Common.Var (Hashtbl.find table vtable)
with
| Not_found ->
let ident = Ident.next "shared_vtable" in
let param, var = FCons.param_var ident in
(* helping for debug: comment out the fields of the var *)
let var =
let comments = String.concat_map ~left:"[" ~right:"]" " ; " (Printf.sprintf "%S") vtable in
Ocaml.Comments (comments, var) in
let fields_expr = List.map Ocaml.Cons.string vtable in
let make = Ocaml.Cons.app ServerLib.VTable.register (Ocaml.AnArray fields_expr) in
let let_definition = Ocaml.make_Let param make in
Hashtbl.add table vtable var ;
Flat_Common.NewVar (let_definition, var)
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