Imported Upstream version 8.5~beta1+dfsg

1 files changed, 45 insertions, 0 deletions

diff --git a/printing/genprint.ml b/printing/genprint.ml
new file mode 100644
index 00000000..ade69ef8
--- /dev/null
+++ b/printing/genprint.ml
@@ -0,0 +1,45 @@
+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2015     *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+open Pp
+open Genarg
+
+type ('raw, 'glb, 'top) printer = {
+  raw : 'raw -> std_ppcmds;
+  glb : 'glb -> std_ppcmds;
+  top : 'top -> std_ppcmds;
+}
+
+module PrintObj =
+struct
+  type ('raw, 'glb, 'top) obj = ('raw, 'glb, 'top) printer
+  let name = "printer"
+  let default wit = match unquote (rawwit wit) with
+  | ExtraArgType name ->
+    let printer = {
+      raw = (fun _ -> str "<genarg:" ++ str name ++ str ">");
+      glb = (fun _ -> str "<genarg:" ++ str name ++ str ">");
+      top = (fun _ -> str "<genarg:" ++ str name ++ str ">");
+    } in
+    Some printer
+  | _ -> assert false
+end
+
+module Print = Register (PrintObj)
+
+let register_print0 wit raw glb top =
+  let printer = { raw; glb; top; } in
+  Print.register0 wit printer
+
+let raw_print wit v = (Print.obj wit).raw v
+let glb_print wit v = (Print.obj wit).glb v
+let top_print wit v = (Print.obj wit).top v
+
+let generic_raw_print v = unpack { unpacker = fun w v -> raw_print w (raw v); } v
+let generic_glb_print v = unpack { unpacker = fun w v -> glb_print w (glb v); } v
+let generic_top_print v = unpack { unpacker = fun w v -> top_print w (top v); } v