Set.cs :  » Script » IronRuby » gpcc » C# / CSharp Open Source

// Copyright (c) Microsoft Corporation. All rights reserved.

using System;
using System.Collections.Generic;
using System.Text;


namespace gpcc{
  public class Set<T>: IEnumerable<T>
  {
    private Dictionary<T, bool> elements = new Dictionary<T,bool>();

    public Set()
    {
    }


    public Set(Set<T> items)
    {
      AddRange(items);
    }


    public void Add(T item)
    {
      elements[item] = true;
    }


    public void AddRange(Set<T> items)
    {
      foreach (T item in items)
        Add(item);
    }


    public IEnumerator<T> GetEnumerator()
    {
      return elements.Keys.GetEnumerator();
    }


    System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
    {
      throw new Exception("The method or operation is not implemented.");
    }


    public override string ToString()
    {
      StringBuilder builder = new StringBuilder();

      builder.Append("[");

      foreach (T element in elements.Keys)
        builder.AppendFormat("{0}, ", element);

      builder.Append("]");

      return builder.ToString();
    }
  }
}