40 lines
1.3 KiB
C#
40 lines
1.3 KiB
C#
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////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// Microsoft Research Singularity
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//
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using System;
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using System.Diagnostics;
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using System.IO;
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namespace Microsoft.Singularity.Applications
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{
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public class TreeTestBase { }
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public class MkUnionTest
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{
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public static int SumTree(Tree tree) {
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switch (tree.Tag) {
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case Tree.TagValue.Leaf:
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return 0;
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case Tree.TagValue.Node:
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Tree.Node node = tree.GetAsNode();
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return node.Value + SumTree(node.Left) + SumTree(node.Right);
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default:
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Debug.Assert(false, "Unhandled alternative in switch over 'Tree'");
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return 0;
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}
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}
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public static void Main() {
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Tree tree = Tree.CreateNode(5, Tree.CreateNode(3, Tree.CreateLeaf(), Tree.CreateLeaf()),
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Tree.CreateNode(8, Tree.CreateLeaf(), Tree.CreateLeaf()));
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Console.WriteLine("Sum of tree nodes is " + SumTree(tree));
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TreeTestBase testBase = (TreeTestBase)tree; // Should compile
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Tree.Bar(); // Prints "Bar"
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}
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}
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}
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