I haven't made much progress since the start of Dec 18. Hopefully that will change.
I used to put minor stuff in wombatlang google+. That is going away and I'm not sure how to replace it. Maybe I'll post a "small stuff" post at times and put stuff in the comments. For the moment I'll use this post.
Because there is some discomfit with things having multiple types, I intend to use the word "Mode" instead (in deference to Algol68). For a given value, its Type will be the lowest Mode it can have in the type hierarchy (now "mode hierarchy"), without going into subset modes. Note that if you have 2 Modes with an isA relationship between them, but the lower one has no additional properties that aren't inherited from the higher one, then the lower one is regarded as a subset mode, since it is indistinguishable from one.
Nobody (except me) likes the Wombat name, so I'm going to change it. I rather like Emmy, in honour of one of the 20th century's greatest Mathematicians: Emmy Noether. Or I could look for a name that highlights some of the features of the language, such as: closure orientation, type/mode lattice, bidirectional typing and bidirectional execution driven by the type/mode lattice: BiCLat. Suggestions are welcome to robert.smart@wombatlang.org.
In https://golem.ph.utexas.edu/category/2019/03/left_adjoints_between_categori.html, John Baez makes a push to call "bounded lattice" just "lattice". I like this: there doesn't seem any reason for lattices that don't have a top and bottom, and these can be easily added if missing. However I probably will want sup/inf of more than finite sets: at most "computable sets". So somewhere between lattice and complete lattice. Anyway I'll just say "lattice" from now on.
