File: 50_named_pattern.ml

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ocaml-bitstring 2.0.2-2
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(* Named pattern
 * $Id: 50_named_pattern.ml 142 2008-07-17 15:45:56Z richard.wm.jones $
 *)

open Printf
open Bitstring

(* A byte+length Pascal string. *)
let bitmatch pascal_string =
  { len : 8;
    str : len*8 : string }

let () =
  let bits = bitstring_of_string "\022Mary had a little lamb" in
  bitmatch bits with
  | { :pascal_string } ->
      () (*printf "it's a Pascal string, len = %d, string = %S\n" len str*)
  | { _ } ->
      eprintf "not matching error\n";
      exit 1