My hobbyist coding updates and releases as the mysterious "Mr. Tines"

Tuesday, 22 April 2008

Integrating .Net with Erlang, part 4

So where are we going from here with the Otp.Net code? First off, if we bring the codebase into .Net 2.0 from its '04-'06 vintage, and make all the data classes in the Otp.Erlang namespace immutable -- returning ReadOnlyConnection(of T)rather than arrays as needed -- we can get rid of the ICloneable support. That lets us make Otp.Erlang.Object into an interface containing just the encode method(dropping the decode method, or making it an extension method as per C# 3.0).

Then we can use some subset of the fields used in equality tests to do GetHashCode properly, and replace arrays with growable collections.

Next, fix the range check on Double's floatValue method, and make it return a nullable value:

    public float? floatValue()
        if (d > Single.MaxValue || d < Single.MinValue)
            return null;

        return (float) d;

and rename Long as Integer, kill both their derived classes and make Integer carry a BigInteger to which we can delegate conversions returning nullables.

That will mean some fixing up of input and output, but we need that anyway to handle new-style float values encoded as 8-byte big-endian blobs (and the change of tense means that this is where we move past what I've done so far).

To come after that will be making GenericQueue delegate to Queue(of IObject), and then a general scrub done in comparison with jinterface 1.4, before it will be sorta-releasable.

At the moment it builds, but will not work, so no interim archive is yet publicly available.

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