Add type annotations around all calls to Libobject.declare_object

 These annotations are purely optional, but could be quite helpful
 when trying to understand the code, and in particular trying to
 trace which which data-structure may end in the libobject part
 of a vo. By the way, we performed some code simplifications :
  - in Library, a part of the REQUIRE objects was unused.
  - in Declaremods, we removed some checks that were marked as
  useless, this allows to slightly simplify the stored objects.

 To investigate someday : in recordops, the RECMETHODS is storing
 some evar_maps. This is ok for the moment, but might not be in
 the future (cf previous commit on auto hints). This RECMETHODS
 was not detected by my earlier tests : not used in the stdlib ?

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@14627 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 3 insertions, 1 deletions

diff --git a/library/heads.ml b/library/heads.ml
index 813031558..9f9f1ca25 100644
--- a/library/heads.ml
+++ b/library/heads.ml
@@ -167,7 +167,9 @@ let discharge_head (_,(ref,k)) =
 let rebuild_head (ref,k) =
   (ref, compute_head ref)
 
-let inHead =
+type head_obj = evaluable_global_reference * head_approximation
+
+let inHead : head_obj -> obj =
   declare_object {(default_object "HEAD") with
     cache_function = cache_head;
     load_function = load_head;