Splitted up Genarg in four different levels:

1. Genarg itself which only defines the abstract datatypes needed.
2. Genintern, first file of interp/, defining the intern and subst
   functions.
3. Geninterp, first file of tactics/, defining the interp function.
4. Genprint, first file of printing/, dealing with the printers.

The Genarg file has no dependency and is in lib/, so that we can put
generic arguments everywhere, and in particular in ASTs.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16601 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 53 insertions, 0 deletions

diff --git a/tactics/geninterp.ml b/tactics/geninterp.ml
new file mode 100644
index 000000000..deba01536
--- /dev/null
+++ b/tactics/geninterp.ml
@@ -0,0 +1,53 @@
+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012     *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+open Pp
+open Util
+open Names
+open Genarg
+
+module TacStore = Store.Make(struct end)
+
+type interp_sign = {
+  lfun : (Id.t * tlevel generic_argument) list;
+  extra : TacStore.t }
+
+type ('glb, 'top) interp_fun = interp_sign ->
+    Goal.goal Evd.sigma -> 'glb -> Evd.evar_map * 'top
+
+let arg0_interp_map =
+  ref (String.Map.empty : (Obj.t, Obj.t) interp_fun String.Map.t)
+
+let get_interp0 name =
+  try String.Map.find name !arg0_interp_map
+  with Not_found ->
+    Errors.anomaly (str "interp0 function not found: " ++ str name)
+
+(** For now, the following functions are quite dummy and should only be applied
+    to an extra argument type, otherwise, they will badly fail. *)
+
+let rec obj_interp t = match t with
+| ExtraArgType s -> get_interp0 s
+| _ -> assert false
+
+let interp t = Obj.magic (obj_interp (unquote (rawwit t)))
+
+let generic_interp ist gl v =
+  let t = genarg_tag v in
+  let (sigma, ans) = obj_interp t ist gl (Unsafe.prj v) in
+  (sigma, Unsafe.inj t ans)
+
+(** Registering functions *)
+
+let register_interp0 arg f = match unquote (rawwit arg) with
+| ExtraArgType s ->
+  if String.Map.mem s !arg0_interp_map then
+    Errors.anomaly (str "interp0 function already registered: " ++ str s)
+  else
+    arg0_interp_map := String.Map.add s (Obj.magic f) !arg0_interp_map
+| _ -> assert false