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QuestionProblem with override the operators Pin
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AnswerRe: Problem with override the operators Pin
DaveyM6913-Mar-13 9:02
professionalDaveyM6913-Mar-13 9:02 
A rough untested example of how I do this for a class (it's much simpler for a struct as it can never be null):
C#
// An immutable int wrapper class
public class SomeClass : IEquatable<SomeClass>
{
    private int index;

    public SomeClass(int index)
    {
        this.index = index;
    }

    public static bool operator ==(SomeClass instance, SomeClass other)
    {
        if(object.ReferenceEquals(instance, other))
            return true;
        if(object.ReferenceEquals(null, instance) || object.ReferenceEquals(null, other))
            return false;
        return instance.index == other.index;
    }
    public static bool operator !=(SomeClass instance, SomeClass other)
    {
        return !(instance == other);
    }

    public int Index
    {
        get { return index; }
    }

    public override bool Equals(object obj)
    {
        return Equals(obj as SomeClass);
    }
    public bool Equals(SomeClass other)
    {
        if(object.ReferenceEquals(null, other))
            return false;
        return index.Equals(other.index);
    }
    public override int GetHashCode()
    {
        return index;
    }
}

And a struct:
C#
// An immutable int wrapper struct
public struct SomeStruct : IEquatable<SomeStruct>
{
    private int index;

    public SomeStruct(int index)
    {
        this.index = index;
    }

    public static bool operator ==(SomeStruct instance, SomeStruct other)
    {
        return instance.index == other.index;
    }
    public static bool operator !=(SomeStruct instance, SomeStruct other)
    {
        return !(instance == other);
    }

    public int Index
    {
        get { return index; }
    }

    public override bool Equals(object obj)
    {
        if(obj is SomeStruct)
            return Equals((SomeStruct)obj);
        return false;
    }
    public bool Equals(SomeStruct other)
    {
        return index.Equals(other.index);
    }
    public override int GetHashCode()
    {
        return index;
    }
}

Dave

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.
Astonish us. Be exceptional. (Pete O'Hanlon)

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
AnswerRe: Problem with override the operators Pin
DaveyM6913-Mar-13 9:10
professionalDaveyM6913-Mar-13 9:10 
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