[pulse] move domain operations in their own submodule

Summary: Just to organise PulseDomain a bit more since it's quite big.

Reviewed By: mbouaziz

Differential Revision: D10509334

fbshipit-source-id: a81b36aa6

infer/src/checkers/PulseDomain.ml

@@ -376,6 +376,8 @@ module Diagnostic = struct
   let get_issue_type (AccessToInvalidAddress _) = IssueType.use_after_lifetime
 end
 
+(** operations on the domain *)
+module Operations = struct
   type 'a access_result = ('a, Diagnostic.t) result
 
   (** Check that the address is not known to be invalid *)
@@ -480,6 +482,7 @@ let invalidate location access_expr astate =
     >>= fun (astate, addr) ->
     let actor = {access_expr; location} in
     check_addr_access actor addr astate >>| mark_invalid actor addr
-
+end
 
 include Domain
+include Operations