Added ObjC++ variants of NestedExceptions test.

Adapted to throw NSString objects instead of using "Test" class, as it seems to expose a different ARC issue.

Test/CMakeLists.txt

@@ -60,6 +60,8 @@ if (ENABLE_OBJCXX)
 	list(APPEND TESTS
 	ExceptionTestObjCXX.mm
 	ExceptionTestObjCXX_arc.mm
+	NestedExceptionsObjCXX.mm
+	NestedExceptionsObjCXX_arc.mm
 	)
 endif()
 

Test/NestedExceptionsObjCXX.mm

@@ -0,0 +1,35 @@
+#include "Test.h"
+
+
+id a;
+int throwException(void)
+{
+	@throw a;
+}
+
+
+int main(void)
+{
+	id e1 = @"Exception 1";
+	id e2 = @"Exception 2";
+	@try
+	{
+		a = e1;
+		throwException();
+	}
+	@catch (id x)
+	{
+		assert(x == e1);
+		@try {
+			a = e2;
+			@throw a;
+		}
+		@catch (id y)
+		{
+			assert(y == e2);
+		}
+	}
+	[e1 dealloc];
+	[e2 dealloc];
+	return 0;
+}

Test/NestedExceptionsObjCXX_arc.mm

@@ -0,0 +1,33 @@
+#include "Test.h"
+
+
+id a;
+int throwException(void)
+{
+	@throw a;
+}
+
+
+int main(void)
+{
+	id e1 = @"Exception 1";
+	id e2 = @"Exception 2";
+	@try
+	{
+		a = e1;
+		throwException();
+	}
+	@catch (id x)
+	{
+		assert(x == e1);
+		@try {
+			a = e2;
+			@throw a;
+		}
+		@catch (id y)
+		{
+			assert(y == e2);
+		}
+	}
+	return 0;
+}