61 lines
2.2 KiB
OCaml
61 lines
2.2 KiB
OCaml
(* camlp4r pa_extend.cmo q_MLast.cmo *)
|
|
(***********************************************************************)
|
|
(* *)
|
|
(* Camlp4 *)
|
|
(* *)
|
|
(* Daniel de Rauglaudre, projet Cristal, INRIA Rocquencourt *)
|
|
(* *)
|
|
(* Copyright 2001 Institut National de Recherche en Informatique et *)
|
|
(* Automatique. Distributed only by permission. *)
|
|
(* *)
|
|
(***********************************************************************)
|
|
|
|
(* $Id$ *)
|
|
|
|
open Pa_extend;
|
|
|
|
value psymbol p s t =
|
|
let symb = {used = []; text = s; styp = fun _ -> t} in
|
|
{pattern = Some p; symbol = symb}
|
|
;
|
|
|
|
EXTEND
|
|
symbol: LEVEL "top"
|
|
[ NONA
|
|
[ min = [ UIDENT "SLIST0" -> False | UIDENT "SLIST1" -> True ];
|
|
s = SELF; sep = OPT [ UIDENT "SEP"; t = symbol -> t ] ->
|
|
let used =
|
|
match sep with
|
|
[ Some symb -> [mk_name loc <:expr< anti >> :: symb.used @ s.used]
|
|
| None -> s.used ]
|
|
in
|
|
let text n =
|
|
let rl =
|
|
let r1 =
|
|
let prod =
|
|
let n = mk_name loc <:expr< anti_list >> in
|
|
[psymbol <:patt< a >> (snterm loc n None)
|
|
<:ctyp< 'anti_list >>]
|
|
in
|
|
let act = <:expr< a >> in {prod = prod; action = Some act}
|
|
in
|
|
let r2 =
|
|
let psymb =
|
|
let symb =
|
|
{used = []; text = slist loc min sep s;
|
|
styp = fun n -> <:ctyp< list $s.styp n$ >>}
|
|
in
|
|
let patt = <:patt< l >> in
|
|
{pattern = Some patt; symbol = symb}
|
|
in
|
|
let act = <:expr< list l >> in
|
|
{prod = [psymb]; action = Some act}
|
|
in
|
|
[r1; r2]
|
|
in
|
|
srules loc "anti" rl n
|
|
in
|
|
{used = used; text = text; styp = fun _ -> <:ctyp< ast >>} ] ]
|
|
;
|
|
END;
|