B: Full Source Code Listings in C#

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Appendix B: Full Source Code Listings
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// Player 1 has that position marked token = players[0]; } else if ((position & playerPositions[1]) == position) { // Player 2 has that position marked token = players[1]; } else { // The position is empty token = ' '; } return token; } #line 113 "TicTacToecs" // Generated code goes here #line default }
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Listing B2: ProductSerialNumber
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public sealed class ProductSerialNumber { public ProductSerialNumber( string productSeries, int model, long id) { ProductSeries = productSeries; Model = model; Id = id; } public readonly string ProductSeries; public readonly int Model; public readonly long Id; public override int GetHashCode() { int hashCode = ProductSeriesGetHashCode(); hashCode ^= Model; // Xor (eXclusive OR) hashCode ^= IdGetHashCode(); // Xor (eXclusive OR) return hashCode; }
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public override bool Equals(object obj) { if (obj == null) { return false; } if (ReferenceEquals(this, obj)) { return true; } if (thisGetType() != objGetType()) { return false; } return Equals((ProductSerialNumber)obj); } public { // // // // // // // // // // // // bool Equals(ProductSerialNumber obj) STEP 3: Possibly check for equivalent hash codes if (thisGetHashCode() != objGetHashCode()) { return false; } STEP 4: Check baseEquals if base overrides Equals() SystemDiagnosticsDebugAssert( baseGetType() != typeof(object)); if ( baseEquals(obj) ) { return false; }
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// STEP 1: Check for null return ((obj != null) // STEP 5: Compare identifying fields for equality && (ProductSeries == objProductSeries) && (Model == objModel) && (Id == objId)); } public static bool operator ==( ProductSerialNumber leftHandSide, ProductSerialNumber rightHandSide) { // Check if leftHandSide is null // (operator== would be recursive)
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Appendix B: Full Source Code Listings
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if (ReferenceEquals(leftHandSide, null)) { // Return true if rightHandSide is also null // but false otherwise return ReferenceEquals(rightHandSide, null); } return (leftHandSideEquals(rightHandSide)); } public static bool operator !=( ProductSerialNumber leftHandSide, ProductSerialNumber rightHandSide) { return !(leftHandSide == rightHandSide); } }
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Listing B3: Binary Tree and Pair
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public enum PairItem { First, Second }
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interface IPair<T> { T First { get; set; } T Second { get; set; } T this[PairItem index] { get; set; } }
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using SystemCollections; using SystemCollectionsGeneric; public struct Pair<T> : IPair<T>, IEnumerable<T> { public Pair(T first) { _First = first; _Second = default(T); } public Pair(T first, T second) { _First = first; _Second = second; } public T First { get { return _First; } set { _First = value; } } private T _First;
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public T Second { get { return _Second; } set { _Second = value; } } private T _Second; [SystemRuntimeCompilerServicesIndexerName("Entry")] public T this[PairItem index] { get { switch (index) { case PairItemFirst:
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Appendix B: Full Source Code Listings
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return First; case PairItemSecond: return Second; default: throw new NotImplementedException( stringFormat( "The enum {0} has not been implemented", indexToString())); } } set { switch (index) { case PairItemFirst: First = value; break; case PairItemSecond: Second = value; break; default: throw new NotImplementedException( stringFormat( "The enum {0} has not been implemented", indexToString())); } } } #region IEnumerable<T> Members public IEnumerator<T> GetEnumerator() { yield return First; yield return Second; } #endregion #region IEnumerable Members IEnumerator IEnumerableGetEnumerator() { return GetEnumerator(); } #endregion public IEnumerable<T> GetReverseEnumerator() { yield return Second; yield return First; }
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// Listing 1224 public IEnumerable<T> GetNotNullEnumerator() { if ((First == null) || (Second == null)) { yield break; } yield return Second; yield return First; } }
using SystemCollections; using SystemCollectionsGeneric; public interface IBinaryTree<T> { T Item { get; set; } Pair<IBinaryTree<T>> SubItems { get; set; } } public class BinaryTree<T> : IEnumerable<T> { public BinaryTree(T value) { Value = value; } public T Value { get { return _Value; } set { _Value = value; } } private T _Value; public Pair<BinaryTree<T>> SubItems { get { return _SubItems; } set { IComparable first; first = (IComparable)valueFirstValue;
Appendix B: Full Source Code Listings
if (firstCompareTo(valueSecondValue) < 0) { // first is less than second } else { // first and second are the same or // second is less than first } _SubItems = value; } } private Pair<BinaryTree<T>> _SubItems; public T this[params PairItem[] branches] { get { BinaryTree<T> currentNode = this; int totalLevels = (branches == null) 0 : branchesLength; int currentLevel = 0; while (currentLevel < totalLevels) { currentNode = currentNodeSubItems[branches[currentLevel]]; if (currentNode == null) { // The binary tree at this location is null throw new IndexOutOfRangeException(); } currentLevel++; } return currentNodeValue; } } #region IEnumerable<T> // Listing 1222 public IEnumerator<T> GetEnumerator() { // Return the item at this node yield return Value; // Iterate through each of the elements in the pair foreach (BinaryTree<T> tree in SubItems) { if (tree != null) {