From 7002b3daca6da29eadf80019847630b8583c3daf Mon Sep 17 00:00:00 2001
From: Matthieu Sozeau
Date: Sun, 3 Aug 2014 20:02:49 +0200
Subject: Move to a representation of universe polymorphic constants using
 indices for variables. Simplifies instantiation of constants/inductives,
 requiring less allocation and Map.find's. Abstraction by variables is handled
 mostly inside the kernel but could be moved outside.

---
 kernel/typeops.ml | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

(limited to 'kernel/typeops.ml')

diff --git a/kernel/typeops.ml b/kernel/typeops.ml
index cd1f2c8564..cb0c429a95 100644
--- a/kernel/typeops.ml
+++ b/kernel/typeops.ml
@@ -189,9 +189,7 @@ let type_of_projection env (cst,u) =
   match cb.const_proj with
   | Some pb -> 
     if cb.const_polymorphic then
-      let mib,_ = lookup_mind_specif env (pb.proj_ind,0) in
-      let subst = make_inductive_subst mib u in
-	Vars.subst_univs_level_constr subst pb.proj_type
+      Vars.subst_instance_constr u pb.proj_type
     else pb.proj_type
   | None -> raise (Invalid_argument "type_of_projection: not a projection")
 
@@ -388,8 +386,7 @@ let judge_of_projection env p cj =
     with Not_found -> error_case_not_inductive env cj
   in
     assert(eq_mind pb.proj_ind (fst ind));
-    let usubst = make_inductive_subst (fst (lookup_mind_specif env ind)) u in
-    let ty = Vars.subst_univs_level_constr usubst pb.Declarations.proj_type in
+    let ty = Vars.subst_instance_constr u pb.Declarations.proj_type in
     let ty = substl (cj.uj_val :: List.rev args) ty in
       (* TODO: Universe polymorphism for projections *)
       {uj_val = mkProj (p,cj.uj_val);
-- 
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