Saturday, November 3, 2012


Sorry about the lack of updates, but I've been busy at a new job and discovered a showstopper with the language design. The issue has to do with free functions, scopes, and the type system. I want to allow extension methods to count for a given type. That is, if you want to consume a type from a 3rd party, but it doesn't quite fit into the interface of another 3rd party interface, you should be free to add an extension method to the type to fit it into the interface. Alas, this leads to tons of trouble once the extension method lives in different scopes from the type it extends, the interface its trying to fit, and/or the methods that actually require you meet the interface. Since that was one of the core things that the module system was meant to address, it's probably going to be junked and/or revisited. Not sure what it's going to be yet; I might go with a similar system, but limit the impact of free functions to typing (bleh) or constrain the module system to better allow this sort of behavior (more likely). But it's a matter of defining what I want, what tradeoffs are acceptable, and then doing a better job vetting the correctness of the design.