namespace Simple.Data

{

using System;

public class SimpleEmptyExpression : SimpleExpression, IEquatable<SimpleEmptyExpression>

{

public SimpleEmptyExpression() : base(null, null, SimpleExpressionType.Empty)

{

}

public bool Equals(SimpleEmptyExpression other)

{

return !ReferenceEquals(null, other);

}

public override bool Equals(object obj)

{

if (ReferenceEquals(null, obj)) return false;

if (ReferenceEquals(this, obj)) return true;

if (obj.GetType() != typeof (SimpleEmptyExpression)) return false;

return Equals((SimpleEmptyExpression) obj);

}

public override int GetHashCode()

{

return 0;

}

public static bool operator ==(SimpleEmptyExpression left, SimpleEmptyExpression right)

{

return Equals(left, right);

}

public static bool operator !=(SimpleEmptyExpression left, SimpleEmptyExpression right)

{

return !Equals(left, right);

}

}

}