myfile.ml

(*
    Copyright © 2011 MLstate

    This file is part of Opa.

    Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*)
(* this is a sample to show how use opa with a bypass plugin *)
##register myfunction : string -> string
let myfunction s =
   let len = String.length s in
   let s' = String.copy s in
    for i = 0 to pred len do
      s'.[i] <- s.[len-i-1]
    done;
    s'

##extern-type 'a toto = 'a
external identity : 'a -> 'a = "%identity"
##register wrap\identity : 'a -> toto('a)
##register unwrap\identity : toto('a) -> 'a

##register dbl314 : float -> float
let dbl314 x = (2. *. 3.14) *. x

##module Proj

##register string : -> opa[string]
let string () = ServerLib.wrap_string "toto"

##register option : 'a -> opa[option('a)]
let option a = ServerLib.wrap_option (Some a)

##endmodule

##opa-type intlist
##opa-type list('a)
##extern-type 'a ocaml_list = 'a list

let (+++) (f, x) r =
  ServerLib.add_field r
    (ServerLib.static_field_of_name f)
    (Obj.magic x)
let (|+>) r (f, x) = (f, x) +++ r
let (!!!) r = ServerLib.make_record r
let zero = ServerLib.empty_record_constructor

##register mk_void : void -> opa[void]
let mk_void () = ServerLib.void

let void = ServerLib.void

##register mk_nil : void -> opa[list('a)]
let mk_nil () =
  let mk_nil0 () = ("nil", void) +++ zero in
  let record = !!! (mk_nil0 ()) in
  wrap_opa_list record

##register mk_cons : 'a, opa[list('a)] -> opa[list('a)]
let mk_cons hd tl =
  let mk_cons0 hd tl = ("hd", hd) +++ (("tl", tl) +++ zero) in
  let record = !!! (mk_cons0 hd tl) in
  wrap_opa_list record

##register opa_list_of_ocaml_list : ('a -> 'b), ocaml_list('a) -> opa[list('b)]
let opa_list_of_ocaml_list alphaproj list =
  List.fold_right (fun alpha acc ->
    let alpha = alphaproj alpha in
    mk_cons alpha acc) list (mk_nil ())

##register init : int -> opa[list(int)]
let init i =
  let list = Base.List.init i (fun i -> i) in
  opa_list_of_ocaml_list (fun i -> i) list

##register marshal : 'a -> string
let marshal a = Marshal.to_string a []

##register unmarshal : string -> 'a
let unmarshal s =
  let a = Marshal.from_string s 0 in
  ServerLib.sharing_refresh a

##module Modale

##opa-type [opaname] Toto.tutu

##register tutu : opa[Toto.tutu] -> void
let tutu _ = ()

##endmodule