Equality

Equals

Igor is capable of generating Equals and GetHashCode code for your records. Use equals attribute to enable that behaviour.

Example:

[csharp struct equals]
record TestStruct
{
    int int_value;
    string string_value;
}

The following C# code is generated:

public struct TestStruct : System.IEquatable<TestStruct>
{
    public int IntValue { get; set; }
    public string StringValue { get; set; }

    public override int GetHashCode()
    {
        unchecked
        {
            int hash = 17;
            hash = hash * 23 + IntValue.GetHashCode();
            hash = hash * 23 + (StringValue == null ? 0 : StringValue.GetHashCode());
            return hash;
        }
    }

    public override bool Equals(object other)
    {
        if (!(other is TestStruct))
            return false;
        return Equals((TestStruct)other);
    }

    public bool Equals(TestStruct other)
    {
        return IntValue == other.IntValue && StringValue == other.StringValue;
    }
}

Both object.Equals and IEquatable<T>.Equals are generated.

Igor is smart enough to properly use generated nested fields’ Equals and GetHashCode functions.

Note

If equals attribute is set on the variant, all records inherit it.

Equality Operators

You can enable == and != operator generating with equality attribute:

[csharp struct equality]
record TestStruct
{
    int int_value;
    string string_value;
}

The following C# operator overloads are generated:

Note

equality implies equals, so Equals and GetHashCode are also generated.