Checker: Fix bug #4282

Adapt to new [projection] abstract type comprising a constant and
a boolean.

10 files changed, 32 insertions, 25 deletions

diff --git a/checker/cic.mli b/checker/cic.mli
index e875e40f0..d75af7654 100644
--- a/checker/cic.mli
+++ b/checker/cic.mli
@@ -102,7 +102,7 @@ type constr =
   | Case      of case_info * constr * constr * constr array
   | Fix       of constr pfixpoint
   | CoFix     of constr pcofixpoint
-  | Proj      of constant * constr
+  | Proj      of projection * constr
 
 type existential = constr pexistential
 type rec_declaration = constr prec_declaration
diff --git a/checker/closure.ml b/checker/closure.ml
index 356b683fa..c6cc2185d 100644
--- a/checker/closure.ml
+++ b/checker/closure.ml
@@ -276,7 +276,7 @@ and fterm =
   | FInd of pinductive
   | FConstruct of pconstructor
   | FApp of fconstr * fconstr array
-  | FProj of constant * fconstr
+  | FProj of projection * fconstr
   | FFix of fixpoint * fconstr subs
   | FCoFix of cofixpoint * fconstr subs
   | FCase of case_info * fconstr * fconstr * fconstr array
@@ -308,7 +308,7 @@ type stack_member =
   | Zapp of fconstr array
   | Zcase of case_info * fconstr * fconstr array
   | ZcaseT of case_info * constr * constr array * fconstr subs
-  | Zproj of int * int * constant
+  | Zproj of int * int * projection
   | Zfix of fconstr * stack
   | Zshift of int
   | Zupdate of fconstr
@@ -678,8 +678,9 @@ let eta_expand_ind_stack env ind m s (f, s') =
       let (depth, args, s) = strip_update_shift_app m s in
       (** Try to drop the params, might fail on partially applied constructors. *)
       let argss = try_drop_parameters depth pars args in
-      let hstack = Array.map (fun p -> { norm = Red; (* right can't be a constructor though *)
-					 term = FProj (p, right) }) projs in
+	let hstack =
+	  Array.map (fun p -> { norm = Red; (* right can't be a constructor though *)
+			     term = FProj (Projection.make p false, right) }) projs in
 	argss, [Zapp hstack]	
     | _ -> raise Not_found (* disallow eta-exp for non-primitive records *)
 
@@ -738,7 +739,7 @@ let rec knh info m stk =
     | FCast(t,_,_) -> knh info t stk
 
     | FProj (p,c) ->
-      if red_set info.i_flags (fCONST p) then
+      if red_set info.i_flags (fCONST (Projection.constant p)) then
         (let pb = lookup_projection p (info.i_env) in
 	   knh info c (Zproj (pb.proj_npars, pb.proj_arg, p)
 		       :: zupdate m stk))
diff --git a/checker/closure.mli b/checker/closure.mli
index e6b39250d..376e9fef7 100644
--- a/checker/closure.mli
+++ b/checker/closure.mli
@@ -95,7 +95,7 @@ type fterm =
   | FInd of pinductive
   | FConstruct of pconstructor
   | FApp of fconstr * fconstr array
-  | FProj of constant * fconstr
+  | FProj of projection * fconstr
   | FFix of fixpoint * fconstr subs
   | FCoFix of cofixpoint * fconstr subs
   | FCase of case_info * fconstr * fconstr * fconstr array
@@ -117,7 +117,7 @@ type stack_member =
   | Zapp of fconstr array
   | Zcase of case_info * fconstr * fconstr array
   | ZcaseT of case_info * constr * constr array * fconstr subs
-  | Zproj of int * int * constant
+  | Zproj of int * int * projection
   | Zfix of fconstr * stack
   | Zshift of int
   | Zupdate of fconstr
diff --git a/checker/declarations.ml b/checker/declarations.ml
index 8d913475f..36e6a7cab 100644
--- a/checker/declarations.ml
+++ b/checker/declarations.ml
@@ -206,14 +206,15 @@ let rec map_kn f f' c =
   let func = map_kn f f' in
     match c with
       | Const (kn, u) -> (try snd (f' kn u) with No_subst -> c)
-      | Proj (kn,t) -> 
-          let kn' = 
-	    try fst (f' kn Univ.Instance.empty)
-	    with No_subst -> kn 
+      | Proj (p,t) -> 
+          let p' = 
+	    Projection.map (fun kn ->
+			    try fst (f' kn Univ.Instance.empty)
+			    with No_subst -> kn) p
 	  in
 	  let t' = func t in
-	    if kn' == kn && t' == t then c
-	    else Proj (kn', t')
+	    if p' == p && t' == t then c
+	    else Proj (p', t')
       | Ind ((kn,i),u) ->
 	  let kn' = f kn in
 	  if kn'==kn then c else Ind ((kn',i),u)
diff --git a/checker/environ.ml b/checker/environ.ml
index 710ebc712..c0f366000 100644
--- a/checker/environ.ml
+++ b/checker/environ.ml
@@ -147,8 +147,8 @@ let evaluable_constant cst env =
 let is_projection cst env = 
   not (Option.is_empty (lookup_constant cst env).const_proj)
 
-let lookup_projection cst env =
-  match (lookup_constant cst env).const_proj with 
+let lookup_projection p env =
+  match (lookup_constant (Projection.constant p) env).const_proj with 
   | Some pb -> pb
   | None -> anomaly ("lookup_projection: constant is not a projection")
 
diff --git a/checker/environ.mli b/checker/environ.mli
index d3448b127..22fe7d8f1 100644
--- a/checker/environ.mli
+++ b/checker/environ.mli
@@ -51,7 +51,7 @@ val constant_value : env -> constant puniverses -> constr
 val evaluable_constant : constant -> env -> bool
 
 val is_projection : constant -> env -> bool
-val lookup_projection : constant -> env -> projection_body
+val lookup_projection : projection -> env -> projection_body
 
 (* Inductives *)
 val mind_equiv : env -> inductive -> inductive -> bool
diff --git a/checker/print.ml b/checker/print.ml
index 1cc48ff77..7624fd325 100644
--- a/checker/print.ml
+++ b/checker/print.ml
@@ -100,7 +100,7 @@ let print_pure_constr csr =
         done
       in print_string"{"; print_fix (); print_string"}"
   | Proj (p, c) ->
-    print_string "Proj("; sp_con_display p; print_string ","; 
+    print_string "Proj("; sp_con_display (Projection.constant p); print_string ","; 
     box_display c; print_string ")"
 
   and box_display c = open_hovbox 1; term_display c; close_box()
diff --git a/checker/reduction.ml b/checker/reduction.ml
index 28fdb130e..58f0f894f 100644
--- a/checker/reduction.ml
+++ b/checker/reduction.ml
@@ -52,7 +52,7 @@ let compare_stack_shape stk1 stk2 =
 
 type lft_constr_stack_elt =
     Zlapp of (lift * fconstr) array
-  | Zlproj of Names.constant * lift
+  | Zlproj of Names.projection * lift
   | Zlfix of (lift * fconstr) * lft_constr_stack
   | Zlcase of case_info * lift * fconstr * fconstr array
 and lft_constr_stack = lft_constr_stack_elt list
@@ -137,7 +137,9 @@ let compare_stacks f fmind lft1 stk1 lft2 stk2 =
             | (Zlfix(fx1,a1),Zlfix(fx2,a2)) ->
                 f fx1 fx2; cmp_rec a1 a2
 	    | (Zlproj (c1,l1),Zlproj (c2,l2)) -> 
-	      if not (Names.eq_con_chk c1 c2) then 
+	       if not (Names.eq_con_chk
+		       (Names.Projection.constant c1)
+		       (Names.Projection.constant c2)) then 
 		raise NotConvertible
             | (Zlcase(ci1,l1,p1,br1),Zlcase(ci2,l2,p2,br2)) ->
                 if not (fmind ci1.ci_ind ci2.ci_ind) then
diff --git a/checker/term.ml b/checker/term.ml
index 93540276b..430be4951 100644
--- a/checker/term.ml
+++ b/checker/term.ml
@@ -392,7 +392,7 @@ let compare_constr f t1 t2 =
       Array.equal f tl1 tl2 && Array.equal f bl1 bl2
   | CoFix(ln1,(_,tl1,bl1)), CoFix(ln2,(_,tl2,bl2)) ->
       Int.equal ln1 ln2 && Array.equal f tl1 tl2 && Array.equal f bl1 bl2
-  | Proj (p1,c1), Proj(p2,c2) -> eq_con_chk p1 p2 && f c1 c2
+  | Proj (p1,c1), Proj(p2,c2) -> Projection.equal p1 p2 && f c1 c2
   | _ -> false
 
 let rec eq_constr m n =
diff --git a/checker/values.ml b/checker/values.ml
index b2d74821d..46b66adc4 100644
--- a/checker/values.ml
+++ b/checker/values.ml
@@ -13,7 +13,7 @@
 To ensure this file is up-to-date, 'make' now compares the md5 of cic.mli
 with a copy we maintain here:
 
-MD5 f5fd749af797e08efee22122742bc740 checker/cic.mli
+MD5 cabb12868c5ab7a51dbc6dc2ae8c0894 checker/cic.mli
 
 *)
 
@@ -126,6 +126,7 @@ let v_caseinfo =
   v_tuple "case_info" [|v_ind;Int;Array Int;Array Int;v_cprint|]
 
 let v_cast = v_enum "cast_kind" 4
+let v_proj = v_tuple "projection" [|v_cst; v_bool|]
 
 let rec v_constr =
   Sum ("constr",0,[|
@@ -145,7 +146,7 @@ let rec v_constr =
     [|v_caseinfo;v_constr;v_constr;Array v_constr|]; (* Case *)
     [|v_fix|]; (* Fix *)
     [|v_cofix|]; (* CoFix *)
-    [|v_cst;v_constr|] (* Proj *)
+    [|v_proj;v_constr|] (* Proj *)
   |])
 
 and v_prec = Tuple ("prec_declaration",
@@ -205,8 +206,10 @@ let v_cst_def =
     [|[|Opt Int|]; [|v_cstr_subst|]; [|v_lazy_constr|]|]
 
 let v_projbody =
-  v_tuple "projection_body" [|v_cst;Int;Int;v_constr;v_tuple "proj_eta" [|v_constr;v_constr|];
-			      v_constr|]
+  v_tuple "projection_body"
+	  [|v_cst;Int;Int;v_constr;
+	    v_tuple "proj_eta" [|v_constr;v_constr|];
+	    v_constr|]
 
 let v_cb = v_tuple "constant_body"
   [|v_section_ctxt;