Add Python support for std::unique_ptr inputs

Equivalent to Java/C# implementation.

Examples/test-suite/cpp11_std_unique_ptr.i

@@ -53,7 +53,7 @@ struct KlassInheritance : virtual Klass {
   }
 };
 
-#if defined(SWIGJAVA) || defined (SWIGCSHARP)
+#if defined(SWIGJAVA) || defined (SWIGCSHARP) || defined(SWIGPYTHON)
 std::string takeKlassUniquePtr(std::unique_ptr<Klass> k) {
   return std::string(k->getLabel());
 }

Examples/test-suite/python/cpp11_std_unique_ptr_runme.py

@@ -1,5 +1,70 @@
 from cpp11_std_unique_ptr import *
 
+def checkCount(expected_count):
+    actual_count = Klass.getTotal_count()
+    if (actual_count != expected_count):
+        raise RuntimeError("Counts incorrect, expected:" + expected_count + " actual:" + actual_count)
+
+# unique_ptr as input
+kin = Klass("KlassInput")
+checkCount(1)
+s = takeKlassUniquePtr(kin)
+checkCount(0)
+if kin.thisown:
+    raise RuntimeError("thisown should be false")
+if s != "KlassInput":
+    raise RuntimeError("Incorrect string: " + s)
+if not is_nullptr(kin):
+    raise RuntimeError("is_nullptr failed")
+del kin # Should not fail, even though already deleted
+checkCount(0)
+
+kin = Klass("KlassInput")
+checkCount(1)
+s = takeKlassUniquePtr(kin)
+checkCount(0)
+if kin.thisown:
+    raise RuntimeError("thisown should be false")
+if s != "KlassInput":
+    raise RuntimeError("Incorrect string: " + s)
+if not is_nullptr(kin):
+    raise RuntimeError("is_nullptr failed")
+exception_thrown = False
+try:
+    s = takeKlassUniquePtr(kin)
+except RuntimeError as e:
+    exception_thrown = True
+if not exception_thrown:
+    raise RuntimeError("double usage of takeKlassUniquePtr should have been an error")
+del kin # Should not fail, even though already deleted
+checkCount(0)
+
+kin = Klass("KlassInput")
+exception_thrown = False
+try:
+    notowned = get_not_owned_ptr(kin)
+    takeKlassUniquePtr(notowned)
+except RuntimeError as e:
+    exception_thrown = True
+if not exception_thrown:
+  raise RuntimeError("Should have thrown 'Cannot release ownership as memory is not owned' error")
+del kin
+checkCount(0)
+
+kini = KlassInheritance("KlassInheritanceInput")
+checkCount(1)
+s = takeKlassUniquePtr(kini)
+checkCount(0)
+if kini.thisown:
+    raise RuntimeError("thisown should be false")
+if s != "KlassInheritanceInput":
+    raise RuntimeError("Incorrect string: " + s)
+if not is_nullptr(kini):
+    raise RuntimeError("is_nullptr failed")
+del kini # Should not fail, even though already deleted
+checkCount(0)
+
+# unique_ptr as output
 k1 = makeKlassUniquePtr("first")
 k2 = makeKlassUniquePtr("second")
 if Klass.getTotal_count() != 2: