diff options
Diffstat (limited to 'camlp4/lib/fstream.ml')
| -rw-r--r-- | camlp4/lib/fstream.ml | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/camlp4/lib/fstream.ml b/camlp4/lib/fstream.ml deleted file mode 100644 index 14ab3a3d1c..0000000000 --- a/camlp4/lib/fstream.ml +++ /dev/null @@ -1,77 +0,0 @@ -(* camlp4r *) -(* $Id$ *) -(* Copyright 2001 INRIA *) - -type t 'a = { count : int; data : Lazy.t (data 'a) } -and data 'a = - [ Nil - | Cons of 'a and t 'a - | App of t 'a and t 'a ] -; - -value from f = - loop 0 where rec loop i = - {count = 0; - data = - lazy - (match f i with - [ Some x -> Cons x (loop (i + 1)) - | None -> Nil ])} -; - -value rec next s = - let count = s.count + 1 in - match Lazy.force s.data with - [ Nil -> None - | Cons a s -> Some (a, {count = count; data = s.data}) - | App s1 s2 -> - match next s1 with - [ Some (a, s1) -> Some (a, {count = count; data = lazy (App s1 s2)}) - | None -> - match next s2 with - [ Some (a, s2) -> Some (a, {count = count; data = s2.data}) - | None -> None ] ] ] -; - -value empty s = - match next s with - [ Some _ -> None - | None -> Some ((), s) ] -; - -value nil = {count = 0; data = lazy Nil}; -value cons a s = Cons a s; -value app s1 s2 = App s1 s2; -value flazy f = {count = 0; data = Lazy.lazy_from_fun f}; - -value of_list l = - List.fold_right (fun x s -> flazy (fun () -> cons x s)) l nil -; - -value of_string s = - from (fun c -> if c < String.length s then Some s.[c] else None) -; - -value of_channel ic = - from (fun _ -> try Some (input_char ic) with [ End_of_file -> None ]) -; - -value iter f = - do_rec where rec do_rec strm = - match next strm with - [ Some (a, strm) -> - let _ = f a in - do_rec strm - | None -> () ] -; - -value count s = s.count; - -value count_unfrozen s = - loop 0 s where rec loop cnt s = - if Lazy.lazy_is_val s.data then - match Lazy.force s.data with - [ Cons _ s -> loop (cnt + 1) s - | _ -> cnt ] - else cnt -; |
