84 lines
3.0 KiB
OCaml
84 lines
3.0 KiB
OCaml
open Camlp4; (* -*- camlp4r -*- *)
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(****************************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* INRIA Rocquencourt *)
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(* *)
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(* Copyright 2006 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed under *)
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(* the terms of the GNU Library General Public License, with the special *)
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(* exception on linking described in LICENSE at the top of the Objective *)
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(* Caml source tree. *)
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(* *)
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(****************************************************************************)
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(* Authors:
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* - Nicolas Pouillard: initial version
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*)
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module Id = struct
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value name = "Camlp4Parsers.Debug";
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value version = "$Id$";
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end;
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module Make (Syntax : Sig.Camlp4Syntax.S) = struct
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open Sig.Camlp4Token;
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include Syntax;
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module StringSet = Set.Make String;
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value debug_mode =
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try
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let str = Sys.getenv "STATIC_CAMLP4_DEBUG" in
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let rec loop acc i =
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try
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let pos = String.index_from str i ':' in
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loop (StringSet.add (String.sub str i (pos - i)) acc) (pos + 1)
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with
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[ Not_found ->
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StringSet.add (String.sub str i (String.length str - i)) acc ] in
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let sections = loop StringSet.empty 0 in
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if StringSet.mem "*" sections then fun _ -> True
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else fun x -> StringSet.mem x sections
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with [ Not_found -> fun _ -> False ];
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value rec apply accu =
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fun
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[ [] -> accu
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| [x :: xs] ->
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let _loc = Ast.loc_of_expr x
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in apply <:expr< $accu$ $x$ >> xs ];
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value mk_debug_mode _loc = fun [ None -> <:expr< Debug.mode >>
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| Some m -> <:expr< $uid:m$.Debug.mode >> ];
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value mk_debug _loc m fmt section args =
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let call = apply <:expr< Debug.printf $str:section$ $str:fmt$ >> args in
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<:expr< if $mk_debug_mode _loc m$ $str:section$ then $call$ else () >>;
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EXTEND Gram
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GLOBAL: expr;
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expr:
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[ [ m = start_debug; section = LIDENT; fmt = STRING;
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args = LIST0 expr LEVEL "."; x = end_or_in ->
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match (x, debug_mode section) with
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[ (None, False) -> <:expr< () >>
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| (Some e, False) -> e
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| (None, _) -> mk_debug _loc m fmt section args
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| (Some e, _) -> <:expr< let () = $mk_debug _loc m fmt section args$ in $e$ >> ]
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] ];
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end_or_in:
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[ [ "end" -> None
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| "in"; e = expr -> Some e
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] ];
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start_debug:
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[ [ LIDENT "debug" -> None
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| LIDENT "camlp4_debug" -> Some "Camlp4"
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] ];
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END;
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end;
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let module M = Register.OCamlSyntaxExtension Id Make in ();
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