Interesting approach to emulating sum types in Go: define an interface with a placeholder function on all of the relevant types! https://www.jerf.org/iri/post/2917
Includes an example with an AST type. You can even stop people extending your interface by making your placeholder private.
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I've been tinkering with an LLM interface with my calendar and it's really nice to use.
"Delete my April trip" is a lot less fiddly than opening calendar, switching to the month view, scrolling to April and so on.
I should probably build an undo as well though.
An interesting feature of the Grok TiddlyWiki interface: it has the sidebar on the right.
I see a sidebar on the left way more often, but arguably it makes more sense on the right for a wiki? The content is effectively more prominent.
Optimising GHC, implementing assembly pretty-printers, and the tradeoffs of implementing against an interface: https://www.tweag.io/blog/2022-12-22-making-ghc-faster-at-emitting-code/