ICE框架之Slice2CSharp映射－－－字典的映射

　在slice中我们有如下定义：

Dictionary<long, Employee> EmployeeMap;

Slice2CS编译器会将上面的字典生成同名的C＃类：

       public class EmployeeMap : System.Collections.DictionaryBase,

                                              System.ICloneable

    {

      public Employee this[long key] { get; set; }

      public System.Collections.ICollection Keys { get; }

      public System.Collections.ICollection Values { get; }

      public void AddRange(EmployeeMap d);

public void Add(long key, Employee value);

      public void Remove(long key);

      public bool Contains(long key);

      public object Clone();

      public override int GetHashCode();

      public override bool Equals(object other);

      public static bool Equals(EmployeeMap lhs,

                                      EmployeeMap rhs);

      public static bool operator==(EmployeeMap lhs,

                                           EmployeeMap rhs);

      public static bool operator!=(EmployeeMap lhs,

                                           EmployeeMap rhs);

     }

       注意生成的类继承自DictionaryBase基类，所以也就拥有基类的方法。利用继承自基类的AddRange方法我们可以将一个字典的内容附加到另一个字典。如果目标字典和源字典的键有冲突的话，目标字典的键不会被覆盖。例如：

Employee e1 = new Employee();

e1.number = 42;

e1.firstName = "Herb";

e1.lastName = "Sutter";

EmployeeMap em1 = new EmployeeMap();

em[42] = e1;

Employee e2 = new Employee();

e2.number = 42;

e2.firstName = "Stan";

e2.lastName = "Lipmann";

EmployeeMap em2 = new EmployeeMap();

em[42] = e2;

// Add contents of em2 to em1

  em1.AddRange(em2);

// Equal keys preserve the original value

Debug.Assert(em1[42].firstName.Equals("Herb"));

生成的代码也提供了GetHashCode、Equals、== 、!=方法（两个字典只有在它们包含的条目一样多，并且每个条目的键和值都相同时，才被认为是相等的）。

       生成的Clone方法依然是浅copy。