[Swift 4] Update Threaded Binary Tree

asilturk · Aug 2, 2017 · 0b55806 · 0b55806
1 parent 61c9376
commit 0b55806
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/Threaded Binary Tree/ThreadedBinaryTree.playground/Contents.swift b/Threaded Binary Tree/ThreadedBinaryTree.playground/Contents.swift
@@ -1,5 +1,10 @@
 //: Playground - noun: a place where people can play
 
+// last checked with Xcode 9.0b4
+#if swift(>=4.0)
+print("Hello, Swift 4!")
+#endif
+
 // Simple little debug function to make testing output pretty
 func check(_ tree: ThreadedBinaryTree<Int>?) {
   if let tree = tree {