Allow std::set<> C# typemaps to work for non-nullable types too

Notably make them work for primitive types, such as "int".

Doing this requires using "object" instead of the actual C# type of the
variable to store the current value in the iterator, as we don't
currently have a "csnullabletype" typemap that would expand to "T" for
nullable types and "T?" for the other ones. This is a bit ugly, but it
shouldn't matter much for the generated code and is already done in
std::vector<> typemaps.

Also add a simple unit test verifying the basic functionality for such
vectors.

Closes #1568.

1 files changed, 2 insertions, 2 deletions

diff --git a/Lib/csharp/std_set.i b/Lib/csharp/std_set.i
index 1d946e644..82f010aff 100644
--- a/Lib/csharp/std_set.i
+++ b/Lib/csharp/std_set.i
@@ -192,7 +192,7 @@ class set {
     private $csclassname collectionRef;
     private global::System.Collections.Generic.IList<$typemap(cstype, T)> ItemsCollection;
     private int currentIndex;
-    private $typemap(cstype, T) currentObject;
+    private object currentObject;
     private int currentSize;
 
     public $csclassnameEnumerator($csclassname collection) {
@@ -212,7 +212,7 @@ class set {
           throw new global::System.InvalidOperationException("Enumeration finished.");
         if (currentObject == null)
           throw new global::System.InvalidOperationException("Collection modified.");
-        return currentObject;
+        return ($typemap(cstype, T))currentObject;
       }
     }