From 6d5e3e4ec26caa02e4cd3e29fa8c4a989f8b0352 Mon Sep 17 00:00:00 2001
From: Stefano Zacchiroli <zack@upsilon.cc>
Date: Thu, 9 Dec 2004 17:20:56 +0000
Subject: [PATCH] implemented pretty printer for (mutual) (co)inductive types

---
 helm/ocaml/cic_transformations/tacticAstPp.ml | 35 ++++++++++++++++---
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/helm/ocaml/cic_transformations/tacticAstPp.ml b/helm/ocaml/cic_transformations/tacticAstPp.ml
index 32f7ace8e..bc021c134 100644
--- a/helm/ocaml/cic_transformations/tacticAstPp.ml
+++ b/helm/ocaml/cic_transformations/tacticAstPp.ml
@@ -100,22 +100,49 @@ let pp_command = function
   | Abort -> "Abort"
   | Baseuri (Some uri) -> sprintf "Baseuri \"%s\"" uri
   | Baseuri None -> "Baseuri"
-  | Check term -> sprintf "Check %s" (CicAstPp.pp_term term)
+  | Check term -> sprintf "Check %s" (pp_term term)
   | Proof -> "Proof"
   | Qed name ->
       (match name with None -> "Qed" | Some name -> sprintf "Save %s" name)
   | Quit -> "Quit"
   | Redo None -> "Redo"
   | Redo (Some n) -> sprintf "Redo %d" n
-  | Inductive _ -> (* TODO Zack *) assert false
+  | Inductive (params, types) ->
+      let pp_params = function
+        | [] -> ""
+        | params ->
+            " " ^
+            String.concat " "
+              (List.map
+                (fun (name, typ) -> sprintf "(%s:%s)" name (pp_term typ))
+                params)
+      in
+      let pp_constructors constructors =
+        String.concat "\n"
+          (List.map (fun (name, typ) -> sprintf "| %s: %s" name (pp_term typ))
+            constructors)
+      in
+      let pp_type (name, _, typ, constructors) =
+        sprintf "\nwith %s: %s \\def\n%s" name (pp_term typ)
+          (pp_constructors constructors)
+      in
+      (match types with
+      | [] -> assert false
+      | (name, inductive, typ, constructors) :: tl ->
+          let fst_typ_pp =
+            sprintf "%sinductive %s%s: %s \\def\n%s"
+              (if inductive then "" else "co") name (pp_params params)
+              (pp_term typ) (pp_constructors constructors)
+          in
+          fst_typ_pp ^ String.concat "" (List.map pp_type tl))
   | Theorem (flavour, name, typ, body) ->
       sprintf "%s %s: %s %s"
         (pp_flavour flavour)
         (match name with None -> "" | Some name -> name)
-        (CicAstPp.pp_term typ)
+        (pp_term typ)
         (match body with
         | None -> ""
-        | Some body -> "\\def " ^ CicAstPp.pp_term body)
+        | Some body -> "\\def " ^ pp_term body)
   | Undo None -> "Undo"
   | Undo (Some n) -> sprintf "Undo %d" n
 
-- 
2.39.2