Overloading Operators

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  18 years ago

  by Michael H

  Michael H

  Chicago, USA, United States

  Joined 19 years ago

  I've seen that it's possible to overload operators in C#,
  but is it possible for me to get my << for output back?
  

  
  public String operator <<(Console a, String b) {
  a.WriteLine(b);
  }
  

  
  Gives the error:
  

  
  error CS0563: One of the parameters of a binary operator must be
  the containing type.
  

  
  What exactly does this mean?
  

  
  Thanks,
  - Mike
  

  
  

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  18 years ago

  by James Crowley

  James Crowley

  London, United Kingdom

  Joined 20 years ago

  That means that if you've declared this operator within a class called "Fred", then you need to do
  

  
  public String operator <<(Console a, Fred b) {
  a.WriteLine(b);
  }
  

  
  or something wierd like that (according to the documentation on that error):
  

  
  // CS0563.cs
  public class iii
  {
    public static int operator <<(int aa, int bb)   // CS0563
    // try the following line instead
    // public static int operator <<(int aa, iii bb)
    {
       return 0;
    }
  

  
    public static void Main()
    {
    }
  }

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  18 years ago

  by Michael H

  Michael H

  Chicago, USA, United States

  Joined 19 years ago

  That makes sense.
  

  
  Thanks,
  - Mike
  

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