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|
(* camlp5r *)
(* extfold.ml,v *)
(* Copyright (c) INRIA 2007-2017 *)
type ('te, 'a, 'b) t =
'te Gramext.g_entry -> 'te Gramext.g_symbol list -> ('te Stream.t -> 'a) ->
'te Stream.t -> 'b
;;
type ('te, 'a, 'b) tsep =
'te Gramext.g_entry -> 'te Gramext.g_symbol list -> ('te Stream.t -> 'a) ->
('te Stream.t -> unit) -> 'te Stream.t -> 'b
;;
let gen_fold0 final f e entry symbl psymb =
let rec fold accu (strm__ : _ Stream.t) =
match try Some (psymb strm__) with Stream.Failure -> None with
Some a -> fold (f a accu) strm__
| _ -> accu
in
fun (strm__ : _ Stream.t) -> let a = fold e strm__ in final a
;;
let gen_fold1 final f e entry symbl psymb =
let rec fold accu (strm__ : _ Stream.t) =
match try Some (psymb strm__) with Stream.Failure -> None with
Some a -> fold (f a accu) strm__
| _ -> accu
in
fun (strm__ : _ Stream.t) ->
let a = psymb strm__ in
let a =
try fold (f a e) strm__ with Stream.Failure -> raise (Stream.Error "")
in
final a
;;
let gen_fold0sep final f e entry symbl psymb psep =
let failed =
function
[symb; sep] -> Grammar.symb_failed_txt entry sep symb
| _ -> "failed"
in
let rec kont accu (strm__ : _ Stream.t) =
match try Some (psep strm__) with Stream.Failure -> None with
Some v ->
let a =
try psymb strm__ with
Stream.Failure -> raise (Stream.Error (failed symbl))
in
kont (f a accu) strm__
| _ -> accu
in
fun (strm__ : _ Stream.t) ->
match try Some (psymb strm__) with Stream.Failure -> None with
Some a -> let a = kont (f a e) strm__ in final a
| _ -> e
;;
let gen_fold1sep final f e entry symbl psymb psep =
let failed =
function
[symb; sep] -> Grammar.symb_failed_txt entry sep symb
| _ -> "failed"
in
let parse_top =
function
[symb; _] -> Grammar.parse_top_symb entry symb
| _ -> raise Stream.Failure
in
let rec kont accu (strm__ : _ Stream.t) =
match try Some (psep strm__) with Stream.Failure -> None with
Some v ->
let a =
try
try psymb strm__ with
Stream.Failure ->
let a =
try parse_top symbl strm__ with
Stream.Failure -> raise (Stream.Error (failed symbl))
in
Obj.magic a
with Stream.Failure -> raise (Stream.Error "")
in
kont (f a accu) strm__
| _ -> accu
in
fun (strm__ : _ Stream.t) ->
let a = psymb strm__ in let a = kont (f a e) strm__ in final a
;;
let sfold0 f e = gen_fold0 (fun x -> x) f e;;
let sfold1 f e = gen_fold1 (fun x -> x) f e;;
let sfold0sep f e = gen_fold0sep (fun x -> x) f e;;
let sfold1sep f e = gen_fold1sep (fun x -> x) f e;;
let cons x y = x :: y;;
let nil = [];;
let slist0 entry = gen_fold0 List.rev cons nil entry;;
let slist1 entry = gen_fold1 List.rev cons nil entry;;
let slist0sep entry = gen_fold0sep List.rev cons nil entry;;
let slist1sep entry = gen_fold1sep List.rev cons nil entry;;
let sopt entry symbl psymb (strm__ : _ Stream.t) =
try Some (psymb strm__) with Stream.Failure -> None
;;
|
