add FSharpEntity.ArrayRank

Author: Jand42

src/fsharp/vs/Symbols.fs

@@ -297,6 +297,10 @@ and FSharpEntity(cenv:cenv, entity:EntityRef) =
         isResolved() &&
         isArrayTyconRef cenv.g entity
 
+    member __.ArrayRank  = 
+        checkIsResolved()
+        rankOfArrayTyconRef cenv.g entity
+
     member __.IsProvided  = 
         isResolved() &&
         entity.IsProvided

src/fsharp/vs/Symbols.fsi

@@ -167,6 +167,9 @@ and [<Class>] FSharpEntity =
     /// Indicates if the entity is an array type
     member IsArrayType : bool
 
+    /// Gets the rank of an array type
+    member ArrayRank : int
+
     /// Indicates if the entity is a 'fake' symbol related to a static instantiation of a type provider
     member IsStaticInstantiation : bool