[r2007-06-12 12:58:41 by afrisch] starting to upgrade to OCaml 3.10

Original author: afrisch
Date: 2007-06-12 12:59:44+00:00

Makefile.distrib

@@ -66,14 +66,14 @@ ifeq ($(NATIVE), true)
   EXTENSION_LIB = cmxa
   CAML=ocamlopt
   COMPILE = $(CAMLOPT)
-  LINK = $(CAMLOPT) -linkpkg gramlib.cmxa camlp4.cmxa pr_o.cmx
+  LINK = $(CAMLOPT) -linkpkg camlp4lib.cmxa
   SYNTAX += -symbol ocaml_compiler=\"native\"
 else
   EXTENSION = cmo
   EXTENSION_LIB = cma
   COMPILE = $(CAMLC)
   CAML=ocamlc
-  LINK = $(CAMLC) -custom -linkpkg gramlib.cma camlp4.cma pr_o.cmo
+  LINK = $(CAMLC) -custom -linkpkg camlp4lib.cma
   SYNTAX += -symbol ocaml_compiler=\"bytecode\"
 endif
 
@@ -131,7 +131,7 @@ CLEAN_DIRS = $(DIRS) tools tests
 # Objects to build
 
 OBJECTS = \
- driver/config.cmo misc/stats.cmo misc/custom.cmo misc/encodings.cmo \
+ driver/cduce_config.cmo misc/stats.cmo misc/custom.cmo misc/encodings.cmo \
  misc/upool.cmo misc/pretty.cmo misc/ns.cmo misc/imap.cmo misc/html.cmo \
  \
  types/compunit.cmo types/sortedList.cmo misc/bool.cmo types/ident.cmo \
@@ -151,7 +151,7 @@ OBJECTS = \
  compile/lambda.cmo \
  runtime/run_dispatch.cmo runtime/explain.cmo runtime/eval.cmo \
  \
- parser/location.cmo  parser/url.cmo \
+ parser/cduce_loc.cmo  parser/url.cmo \
  parser/ulexer.cmo parser/ast.cmo parser/parser.cmo \
  \
  typing/typed.cmo typing/typepat.cmo types/externals.cmo typing/typer.cmo \
@@ -281,7 +281,7 @@ $(ALL_INTERFACES): misc/q_symbol.cmo
 
 misc/q_symbol.cmo: misc/q_symbol.ml
 	@echo "Build $@"		  
-	$(HIDE)$(CAMLC) -c -pp 'camlp4o pa_extend.cmo q_MLast.cmo' $<
+	$(HIDE)$(CAMLC) -c -pp camlp4orf $<
 
 .ml.cmo:
 	@echo "Build $@"

compile/compile.ml

@@ -174,7 +174,7 @@ let compile_rec_funs env funs =
 
 (****************************************)
 
-open Location
+open Cduce_loc
 
 let eval ~run ~show (tenv,cenv,codes) e =
   let (e,t) = Typer.type_expr tenv e in

compile/operators.ml

-open Location
+open Cduce_loc
 type type_fun = Types.t -> bool -> Types.t
 
 let register op arity typ eval =

compile/operators.mli

-open Location
+open Cduce_loc
 type type_fun = Types.t -> bool -> Types.t
 
 val register: 

driver/cduce.ml

-open Location
+open Cduce_loc
 open Ident
 
 let () = Stats.gettimeofday := Unix.gettimeofday
@@ -79,8 +79,8 @@ let directive_help ppf =
 
 let rec print_exn ppf = function
   | Location (loc, w, exn) ->
-      Location.print_loc ppf (loc,w);
-      Location.html_hilight (loc,w); 
+      Cduce_loc.print_loc ppf (loc,w);
+      Cduce_loc.html_hilight (loc,w); 
       print_exn ppf exn
   | Value.CDuceExn v ->
       Format.fprintf ppf "Uncaught CDuce exception: @[%a@]@."
@@ -121,9 +121,9 @@ let rec print_exn ppf = function
 	U.print (Librarian.name cu)
 	Ident.print x
   | Ulexer.Error (i,j,s) ->
-      let loc = Location.loc_of_pos (i,j), `Full in
-      Location.print_loc ppf loc;
-      Location.html_hilight loc;
+      let loc = Cduce_loc.loc_of_pos (i,j), `Full in
+      Cduce_loc.print_loc ppf loc;
+      Cduce_loc.html_hilight loc;
       Format.fprintf ppf "%s" s
   | Parser.Error s | Stream.Error s -> 
       Format.fprintf ppf "Parsing error: %a@." print_protect s
@@ -145,7 +145,7 @@ let rec print_exn ppf = function
       Format.fprintf ppf "Invalid object file %s@." f
   | Librarian.CannotOpen f ->
       Format.fprintf ppf "Cannot open file %s@." f
-  | Location.Generic s ->
+  | Cduce_loc.Generic s ->
       Format.fprintf ppf "%a@." print_protect s
   | Ns.Label.Not_unique ((ns1,s1),(ns2,s2)) ->
       Format.fprintf ppf "Collision on label hash: {%a}:%a, {%a}:%a" 

driver/evaluator.ml

@@ -35,19 +35,19 @@ let () =
     ignore (Unix.alarm 10);
     Sys.set_signal Sys.sigalrm 
       (Sys.Signal_handle (fun _ -> raise (Cduce.Escape Timeout)));
-    let v = Location.get_viewport () in
+    let v = Cduce_loc.get_viewport () in
     let ppf = Html.ppf v 
     and input = Stream.of_string src in
     Format.pp_set_margin ppf 60;
-    Location.push_source (`String src);
-    Location.set_protected true;
-    Config.init_all ();
+    Cduce_loc.push_source (`String src);
+    Cduce_loc.set_protected true;
+    Cduce_config.init_all ();
     let ok = Cduce.script ppf ppf input in
     if ok then Format.fprintf ppf "@\nOk.@\n";
     Html.get v
   in
 
-  Location.set_viewport (Html.create true);
+  Cduce_loc.set_viewport (Html.create true);
   let prog = Buffer.create 1024 in
   (try while true do Buffer.add_string prog (read_line ()); Buffer.add_string prog "\n" done;
    with End_of_file -> ());

driver/librarian.ml

-open Location
+open Cduce_loc
 open Ident
 
 
@@ -77,17 +77,17 @@ let show ppf id t v =
 let compile verbose name src =
   protect_op "Compile external file";
   let ic = 
-    if src = "" then (Location.push_source `Stream; stdin)
+    if src = "" then (Cduce_loc.push_source `Stream; stdin)
     else
-      try Location.push_source (`File src); open_in src
+      try Cduce_loc.push_source (`File src); open_in src
       with Sys_error _ -> raise (CannotOpen src) in
   let input = Stream.of_channel ic in
   let p = 
     try Parser.prog input 
     with
-      | Stdpp.Exc_located (_, (Location _ | Ulexer.Error _ as e)) -> raise e
-      | Stdpp.Exc_located ((i,j), e) -> 
-	  raise_loc i.Lexing.pos_cnum j.Lexing.pos_cnum e
+      | Ulexer.Loc.Exc_located (_, (Location _ | Ulexer.Error _ as e)) -> raise e
+      | Ulexer.Loc.Exc_located ((i,j), e) -> 
+	  raise_loc i j e
   in
   if src <> "" then close_in ic;
 

driver/run.ml

@@ -15,7 +15,7 @@ let version () =
   Printf.eprintf "built on %s\n" <:symbol<build_date>>;
   Printf.eprintf "using OCaml %s compiler\n" <:symbol<ocaml_compiler>>;
   Printf.eprintf "Supported features: \n";
-  List.iter (fun (n,d) -> Printf.eprintf "- %s: %s\n" n d) (Config.descrs ());
+  List.iter (fun (n,d) -> Printf.eprintf "- %s: %s\n" n d) (Cduce_config.descrs ());
   exit 0
 
 let specs =
@@ -29,7 +29,7 @@ let specs =
              "(for --compile) show types of exported values";
     "--obj-dir",  Arg.String (fun s -> out_dir := s :: !out_dir),
              "(for --compile) directory for the compiled .cdo file";
-    "-I", Arg.String (fun s -> Location.obj_path := s::!Location.obj_path),
+    "-I", Arg.String (fun s -> Cduce_loc.obj_path := s::!Cduce_loc.obj_path),
       "       add one directory to the lookup path for .cdo/.cmi and include files";
     "--stdin", Arg.Unit (fun () -> src := "" :: !src),
            "  read CDuce script on standard input";
@@ -40,7 +40,7 @@ let specs =
 						src := s :: !src)
 			    else args := s :: !args),
             " the first argument after is the source, then the arguments";
-    "--no", Arg.String Config.inhibit,
+    "--no", Arg.String Cduce_config.inhibit,
         "     disable a feature (cduce -v to get a list of features)";
     "--debug", Arg.Unit (fun () -> Stats.set_verbosity Stats.Summary),
            "  print profiling/debugging information";
@@ -124,7 +124,7 @@ let toploop () =
   Cduce.toplevel := true;
   Librarian.run_loaded := true;
   let buf_in = Buffer.create 1024 in
-  Location.push_source (`Buffer buf_in);
+  Cduce_loc.push_source (`Buffer buf_in);
   let read _i =
     if !bol then 
       if !Ulexer.in_comment then outflush "* " else outflush "> ";
@@ -151,26 +151,26 @@ let argv args =
 
 let main () = 
   at_exit (fun () -> Stats.dump Format.std_formatter);
-  Location.set_viewport (Html.create false);
+  Cduce_loc.set_viewport (Html.create false);
   match mode () with
     | `Toplevel args ->
-	Config.init_all ();
+	Cduce_config.init_all ();
 	Builtin.argv := argv args;
 	toploop ()
     | `Script (f,args) ->
-	Config.init_all ();
+	Cduce_config.init_all ();
 	Builtin.argv := argv args;
 	Cduce.compile_run f
     | `Compile (f,o) ->
-	Config.init_all ();
+	Cduce_config.init_all ();
 	Cduce.compile f o
     | `Run (f,args) ->
-	Config.init_all ();
+	Cduce_config.init_all ();
 	Builtin.argv := argv args;
 	Cduce.run f
     | `Mlstub f ->
-	Config.init_all ();
+	Cduce_config.init_all ();
 	Librarian.prepare_stub f
     | `Topstub f ->
-	Config.init_all ();
+	Cduce_config.init_all ();
 	!Librarian.make_wrapper f

driver/webiface.ml

@@ -129,11 +129,11 @@ let main (cgi : Netcgi.std_activation) =
     let dialog content = html_form p content in
 
     let exec src =
-      let v = Location.get_viewport () in
+      let v = Cduce_loc.get_viewport () in
       let ppf = Html.ppf v
       and input = Stream.of_string src in
-      Location.push_source (`String src);
-      Location.set_protected true;
+      Cduce_loc.push_source (`String src);
+      Cduce_loc.set_protected true;
       
       let ok = Cduce.script ppf ppf input in
       if ok then Format.fprintf ppf "@\nOk.@\n";
@@ -144,7 +144,7 @@ let main (cgi : Netcgi.std_activation) =
       dialog src
     in
 
-    Location.set_viewport (Html.create true);
+    Cduce_loc.set_viewport (Html.create true);
     html_header p;
     let prog = cgi # argument_value "prog" in
     (match cmd with

misc/q_symbol.ml

+open Camlp4.PreCast
+module Caml_syntax = Syntax
+
 let symbols = ref []
 
 let define s =
   let i = 
     try String.index s '=' 
     with Not_found -> failwith ("Invalid symbol definition :" ^ s) in
-  symbols := 
-  (String.sub s 0 i, String.sub s (i + 1) (String.length s - i - 1)) ::
-    !symbols
+  let symbol = String.sub s 0 i in
+  let value =
+    Gram.parse_string
+      Caml_syntax.expr (Loc.mk "<from-string>") (String.sub s (i + 1) (String.length s - i - 1))
+  in
+  symbols := (symbol, value) :: !symbols
 
-EXTEND
-  GLOBAL: Pcaml.str_item;
+EXTEND Caml_syntax.Gram
+  GLOBAL: Caml_syntax.str_item;
 
-  Pcaml.str_item: FIRST
+  Caml_syntax.str_item: FIRST
     [ [ "ifdef"; c = UIDENT; "then"; e1 = SELF;
         "else"; e2 = SELF ->
           if List.mem_assoc c !symbols then e1 else e2
       | "ifdef"; c = UIDENT; "then"; e1 = SELF ->
-          if List.mem_assoc c !symbols then e1 else <:str_item< declare end >>
+          if List.mem_assoc c !symbols then e1 else <:str_item<>>
       | "ifndef"; c = UIDENT; "then"; e1 = SELF;
         "else"; e2 = SELF ->
           if List.mem_assoc c !symbols then e2 else e1
       | "ifndef"; c = UIDENT; "then"; e1 = SELF ->
-          if List.mem_assoc c !symbols then <:str_item< declare end >> else e1
+          if List.mem_assoc c !symbols then <:str_item<>> else e1
       ] ];
 END
 
-let expr _ s =
+let expr _ _ s =
   try List.assoc s !symbols
   with Not_found -> failwith ("No definition for symbol " ^ s)
 
 let _ =
-  Quotation.add "symbol" (Quotation.ExStr expr);
-  Pcaml.add_option "-symbol" (Arg.String define) 
+  Quotation.add "symbol" Quotation.DynAst.expr_tag expr;
+  Camlp4.Options.add "-symbol" (Arg.String define) 
     "<symbol=value> Define a symbol"

ocamliface/mlstub.ml

@@ -516,29 +516,20 @@ let stub ty_env c_env exts values mk prolog =
   let items_expr = List.map (fun (_,e,_) -> e)  items in
   let items_pat = List.map (fun (p,_,_) -> p) items in
 
-  let m = 
-    [ <:str_item< open Cduce_lib >>;
-      <:str_item< Config.init_all () >>;
-      <:str_item< 
-	value (types,set_externals,slots,run) = 
-	Librarian.ocaml_stub $str:String.escaped raw$ >> ] @
-      (if g = [] then [] else [ <:str_item< value rec $list:g$ >> ]) @    
-      [ <:str_item< set_externals [|$list:exts$|] >>;
-	<:str_item< run () >> ] @
-      (if items = [] then [] else [ <:str_item< value $list:items_def$ >> ]) in
-
-  let items_expr = 
-    match items_expr with 
-      | [] -> <:expr< () >> 
-      | l -> <:expr< ($list:l$) >> in
-
   let str_items = 
-    [ <:str_item< 
-      value ($list:items_pat$) = 
-	let module C = struct 
-	  $list:m$ 
-	end in $items_expr$ >>, (Lexing.dummy_pos, Lexing.dummy_pos) ] in
-
+    <:str_item< 
+      value ($paCom_of_list items_pat$) = 
+        let module C = struct
+	  open Cduce_lib;
+	  Cduce_config.init_all ();
+	  value (types,set_externals,slots,run) = 
+	    Librarian.ocaml_stub $str:String.escaped raw$;
+	  value rec $biAnd_of_list g$;
+	  set_externals [|$exSem_of_list exts$|];
+	  run ();
+	  value $biAnd_of_list items_def$;
+	end in ($exCom_of_list items_expr$) >> in
+  
   print_endline prolog;
   !Pcaml.print_implem str_items
 (*  let exe = Filename.concat (Filename.dirname Sys.argv.(0)) "cdo2ml" in
@@ -599,12 +590,12 @@ let wrapper values =
     values in
   let g = global_transl () in
 
-  let m = if g = [] then exts else <:str_item< value rec $list:g$ >>::exts in
-  let m = [ <:str_item< open Cduce_lib >>;
-	    <:str_item< Config.init_all () >>] @ m in
-
-  <:str_item< declare $list:m$ end >>
-
+  <:str_item< 
+    open Cduce_lib; 
+    Cduce_config.init_all ();
+    value rec $biAnd_of_list g$;
+    $stSem_of_list exts$;
+  >>
 
 let gen_wrapper vals =
   try

parser/ast.ml

 (*  Abstract syntax as produced by the parser *)
 
-open Location
+open Cduce_loc
 open Ident
 
 type ns_expr = [ `Uri of Ns.Uri.t | `Path of U.t list ]
@@ -9,7 +9,7 @@ type pprog = pmodule_item list
 
 and pmodule_item = pmodule_item' located
 and pmodule_item' =
-  | TypeDecl of (Location.loc * U.t) * ppat
+  | TypeDecl of (Cduce_loc.loc * U.t) * ppat
   | SchemaDecl of U.t * string
   | LetDecl of ppat * pexpr
   | FunDecl of pexpr
@@ -86,7 +86,7 @@ and pexpr =
 and label = U.t
 
 and abstr = { 
-  fun_name : (Location.loc * U.t) option; 
+  fun_name : (Cduce_loc.loc * U.t) option; 
   fun_iface : (ppat * ppat) list;
   fun_body : branches
 }
@@ -100,7 +100,7 @@ and ppat' =
   | PatVar of U.t list
   | Cst of pexpr
   | NsT of U.t
-  | Recurs of ppat * (Location.loc * U.t * ppat) list
+  | Recurs of ppat * (Cduce_loc.loc * U.t * ppat) list
   | Internal of Types.descr
   | Or of ppat * ppat
   | And of ppat * ppat
@@ -123,7 +123,7 @@ and regexp =
   | Alt of regexp * regexp
   | Star of regexp
   | WeakStar of regexp
-  | SeqCapture of Location.loc * U.t * regexp
+  | SeqCapture of Cduce_loc.loc * U.t * regexp
 
 
 let pat_true = mknoloc (Internal Builtin_defs.true_type)

parser/cduce_curl.ml

@@ -11,7 +11,7 @@ let load_url s =
 
 
 let () = 
-  Config.register 
+  Cduce_config.register 
     "curl" 
     "Load external URLs with curl"
     (fun () -> Url.url_loader := load_url)

parser/location.ml → parser/cduce_loc.ml

@@ -108,7 +108,7 @@ let extr s i j =
   try
     let n = min (String.length s) j - i in
     if n <= 0 then "" else String.sub s i n
-  with e -> failwith (Printf.sprintf "Location.extr len=%i i=%i j=%i"
+  with e -> failwith (Printf.sprintf "Cduce_loc.extr len=%i i=%i j=%i"
 			(String.length s) i j )
 
 let dump_loc ((src,i,j),w) =
@@ -152,7 +152,7 @@ let html_hilight ((src,i,j),w) =
 
 type 'a located = { loc : loc; descr : 'a }
 
-let mk (i,j) x = { loc = (!source,i,j); descr = x }
+let mk_located (i,j) x = { loc = (!source,i,j); descr = x }
 let mk_loc loc x = { loc = loc; descr = x }
 let mknoloc x = { loc = noloc; descr = x }
 let loc_of_pos (i,j) = (!source,i,j)
@@ -178,3 +178,6 @@ let resolve_filename s =
       Filename.concat p s
     with Not_found -> s
   else s
+
+include Camlp4.PreCast.Loc
+

parser/location.mli → parser/cduce_loc.mli

 (* Locations in source file,
    and presentation of results and errors *)
 
+(* include Camlp4.Sig.Loc *)
+
 type source = 
     [ `None | `File of string | `Stream | `String of string 
     | `Buffer of Buffer.t ]
@@ -37,7 +39,7 @@ val dump_loc: loc * precise -> unit
 val html_hilight: loc * precise -> unit
 
 type 'a located = { loc : loc; descr : 'a }
-val mk: int * int -> 'a -> 'a located
+val mk_located: int * int -> 'a -> 'a located
 val mk_loc: loc -> 'a -> 'a located
 val mknoloc: 'a -> 'a located
 

parser/cduce_netclient.ml

@@ -29,7 +29,7 @@ let load_url s =
 	error msg
 
 let () = 
-  Config.register 
+  Cduce_config.register 
     "netclient" 
     "Load external URLs with netclient"
     (fun () -> Url.url_loader := load_url)

parser/parser.ml

 #load "pa_extend.cmo";;
 
-open Location
+open Cduce_loc
+(* let raise = Pervasives.raise *)
 open Ast
 open Ident
 open Printf
+open Ulexer
 
 (*
 let ()  = Grammar.error_verbose := true
 *)
 
-let tloc (i,j) = (i.Lexing.pos_cnum,j.Lexing.pos_cnum)
-let nopos = (Lexing.dummy_pos, Lexing.dummy_pos)
+let tloc (i,j) = (i,j)
+let nopos = (-1,-1)
 
 
-let mk loc x = Location.mk (tloc loc) x
+let mk loc x = Cduce_loc.mk_located (tloc loc) x
 
 exception Error of string
-let error (i,j) s = Location.raise_loc i j (Error s)
+let error (i,j) s = Cduce_loc.raise_loc i j (Error s)
 let error loc s = error (tloc loc) s
 
-let gram    = Grammar.gcreate Ulexer.lex
+module Gram = Camlp4.Struct.Grammar.Static.Make(Ulexer)
 
 let id_dummy = U.mk "$$$"
 
@@ -36,14 +38,14 @@ let ident s =
 let label s = U.mk (ident s)
 let ident s = U.mk (ident s)
 
-let prog    = Grammar.Entry.create gram "prog"
-let top_phrases   = Grammar.Entry.create gram "toplevel phrases"
-let expr    = Grammar.Entry.create gram "expression"
-let pat     = Grammar.Entry.create gram "type/pattern expression"
-let regexp  = Grammar.Entry.create gram "type/pattern regexp"
-let keyword = Grammar.Entry.create gram "keyword"
+let prog    = Gram.Entry.mk "prog"
+let top_phrases   = Gram.Entry.mk "toplevel phrases"
+let expr    = Gram.Entry.mk "expression"
+let pat     = Gram.Entry.mk "type/pattern expression"
+let regexp  = Gram.Entry.mk "type/pattern regexp"
+let keyword = Gram.Entry.mk "keyword"
 		
-let lop pos = loc_of_pos (tloc pos)
+let lop pos = Cduce_loc.loc_of_pos (tloc pos)
 let exp pos e = LocatedExpr (lop pos,e)
 
 let rec multi_prod loc = function
@@ -86,24 +88,26 @@ let protect_exn f g =
 let localize_exn f = 
   try f ()
   with
-  | Stdpp.Exc_located (_, (Location _ as e)) -> raise e
-(*  | Stdpp.Exc_located ((i,j), e) -> raise_loc i j e *)
-  | Stdpp.Exc_located ((i,j), e) -> raise_loc i.Lexing.pos_cnum j.Lexing.pos_cnum e
+  | Ulexer.Loc.Exc_located (_, (Location _ as e)) -> raise e
+(*  | Camlp4.PreCast.Loc.Exc_located ((i,j), e) -> raise_loc i j e *)
+  | Ulexer.Loc.Exc_located (loc, e) ->
+      let i, j = Ulexer.Loc.start_off loc, Ulexer.Loc.stop_off loc in
+      raise_loc i j e
 
 let is_fun_decl =
-   Grammar.Entry.of_parser gram "[is_fun_decl]"
+   Gram.Entry.of_parser "[is_fun_decl]"
      (fun strm ->
        match Stream.npeek 3 strm with
-	 | [ ("", "fun"); ("IDENT", _); ("", "(") ]
-	 | [ ("IDENT", _) ; ("", "(") ; _ ] -> ()
+	 | [ KEYWORD "fun", _; IDENT _, _; KEYWORD "(", _ ]
+	 | [ IDENT _, _; KEYWORD "(", _; _ ] -> ()
 	 | _ -> raise Stream.Failure
      )
 
 let is_capture =
-   Grammar.Entry.of_parser gram "[is_capture]"
+   Gram.Entry.of_parser "[is_capture]"
      (fun strm ->
        match Stream.npeek 2 strm with
-	 | [ ("IDENT", _) ; ("", "::") ; _ ] -> ()
+	 | [ IDENT _, _; KEYWORD "::", _; _ ] -> ()
 	 | _ -> raise Stream.Failure
      )
 
@@ -123,7 +127,7 @@ let let_in e1 p e2 =  Match (e1, [p,e2])
 let seq e1 e2 = let_in e1 pat_nil e2
 let concat e1 e2 = apply_op2_noloc "@" e1 e2
 
-EXTEND
+EXTEND Gram
   GLOBAL: top_phrases prog expr pat regexp keyword;
 
   top_phrases: [
@@ -131,7 +135,7 @@ EXTEND
   ];
 
   prog: [
-    [ l = LIST0 [ p = phrase ; OPT ";;" -> p ]; EOI -> List.flatten l ]
+    [ l = LIST0 [ p = phrase ; OPT ";;" -> p ]; `EOI -> List.flatten l ]
   ];
 
   phrase: [
@@ -141,9 +145,9 @@ EXTEND
     | (_,p,e1) = let_binding; "in"; e2 = expr LEVEL "top"->
         [ mk _loc (EvalStatement (exp _loc (let_in e1 p e2))) ]
     | "type"; x = located_ident; "="; t = pat -> [ mk _loc (TypeDecl (x,t)) ]
-    | "using"; name = IDENT; "="; cu = [ IDENT | STRING2 ] ->
+    | "using"; name = IDENT; "="; cu = [ x = IDENT -> x | x = STRING2 -> x ] ->