Moving Global.type_of_global_in_context to Typeops.

It is purely functional, so no need for it to be in global now that
GlobRef.t are in the kernel.

Also updated the comments.

2 files changed, 34 insertions, 0 deletions

diff --git a/kernel/typeops.ml b/kernel/typeops.ml
index 164a47dd9a..c3a964d2db 100644
--- a/kernel/typeops.ml
+++ b/kernel/typeops.ml
@@ -319,6 +319,30 @@ let check_fixpoint env lna lar vdef vdeft =
   with NotConvertibleVect i ->
     error_ill_typed_rec_body env i lna (make_judgev vdef vdeft) lar
 
+(* Global references *)
+
+let type_of_global_in_context env r =
+  let open Names.GlobRef in
+  match r with
+  | VarRef id -> Environ.named_type id env, Univ.AUContext.empty
+  | ConstRef c ->
+    let cb = Environ.lookup_constant c env in
+    let univs = Declareops.constant_polymorphic_context cb in
+    cb.Declarations.const_type, univs
+  | IndRef ind ->
+    let (mib,_ as specif) = Inductive.lookup_mind_specif env ind in
+    let univs = Declareops.inductive_polymorphic_context mib in
+    let inst = Univ.make_abstract_instance univs in
+    let env = Environ.push_context ~strict:false (Univ.AUContext.repr univs) env in
+    Inductive.type_of_inductive env (specif, inst), univs
+  | ConstructRef cstr ->
+    let (mib,_ as specif) =
+      Inductive.lookup_mind_specif env (inductive_of_constructor cstr)
+    in
+    let univs = Declareops.inductive_polymorphic_context mib in
+    let inst = Univ.make_abstract_instance univs in
+    Inductive.type_of_constructor (cstr,inst) specif, univs
+
 (************************************************************************)
 (************************************************************************)
 
diff --git a/kernel/typeops.mli b/kernel/typeops.mli
index 515e22c99b..e83c1b3dc5 100644
--- a/kernel/typeops.mli
+++ b/kernel/typeops.mli
@@ -96,6 +96,16 @@ val judge_of_case : env -> case_info
   -> unsafe_judgment -> unsafe_judgment -> unsafe_judgment array
     -> unsafe_judgment
 
+(** {6 Type of global references. } *)
+
+val type_of_global_in_context : env -> GlobRef.t -> types * Univ.AUContext.t
+(** Returns the type of the global reference, by creating a fresh
+    instance of polymorphic references and computing their
+    instantiated universe context. The type should not be used
+    without pushing it's universe context in the environmnent of
+    usage. For non-universe-polymorphic constants, it does not
+    matter. *)
+
 (** {6 Miscellaneous. } *)
 
 (** Check that hyps are included in env and fails with error otherwise *)