diff --git a/src/polygonal/ds/ListSet.hx b/src/polygonal/ds/ListSet.hx
index 870ef62..55b1355 100644
--- a/src/polygonal/ds/ListSet.hx
+++ b/src/polygonal/ds/ListSet.hx
@@ -329,7 +329,7 @@ class ListSet<T> implements Set<T>
 	**/
 	public function toArray():Array<T>
 	{
-		return mData.toArray(0, size, []);
+		return NativeArrayTools.toArray(mData, 0, size, []);
 	}
 	
 	/**
@@ -431,4 +431,4 @@ class ListSetIterator<T> implements polygonal.ds.Itr<T>
 		
 		mData.set(mI, mData.get(--mS));
 	}
-}
\ No newline at end of file
+}
diff --git a/src/polygonal/ds/Printf.hx b/src/polygonal/ds/Printf.hx
index 1598f00..2c07f8a 100644
--- a/src/polygonal/ds/Printf.hx
+++ b/src/polygonal/ds/Printf.hx
@@ -89,14 +89,14 @@ class Printf
 				case Tag(type, tagArgs):
 					if (tagArgs.width == null)
 					{
-						if (!Std.is(args[argIndex], Int))
+						if (!(args[argIndex] is Int))
 							throw new PrintfError("invalid 'width' argument");
 						tagArgs.width = args[argIndex++];
 					}
 					
 					if (tagArgs.precision == null)
 					{
-						if (!Std.is(args[argIndex], Int))
+						if (!(args[argIndex] is Int))
 							throw new PrintfError("invalid 'precision' argument");
 						tagArgs.precision = args[argIndex++];
 					}
@@ -996,4 +996,4 @@ private enum FloatType
 	FNormal;
 	FScientific;
 	FNatural;
-}
\ No newline at end of file
+}
diff --git a/src/polygonal/ds/PriorityQueue.hx b/src/polygonal/ds/PriorityQueue.hx
index aef58e3..dc35f5d 100644
--- a/src/polygonal/ds/PriorityQueue.hx
+++ b/src/polygonal/ds/PriorityQueue.hx
@@ -288,7 +288,7 @@ class PriorityQueue<T:(Prioritizable)> implements Queue<T>
 	{
 		if (isEmpty()) return [];
 		
-		var out = ArrayTools.alloc(size);
+		var out:Array<T> = ArrayTools.alloc(size);
 		var t = mData.copy();
 		var k = size;
 		var j = 0, i, c, v, s, u;
@@ -533,7 +533,7 @@ class PriorityQueue<T:(Prioritizable)> implements Queue<T>
 	**/
 	public function toArray():Array<T>
 	{
-		return mData.toArray(1, size, []);
+		return NativeArrayTools.toArray(mData, 1, size, []);
 	}
 	
 	/**
@@ -800,4 +800,4 @@ class PriorityQueueIterator<T:(Prioritizable)> implements polygonal.ds.Itr<T>
 		
 		mObject.remove(mData.get(mI - 1));
 	}
-}
\ No newline at end of file
+}