Lately I’ve been trying to iron out the details of a generalization of quasiquotation which I call “higher quasiquotation.” The basic idea is that just as a quasiquotation is a region in one parenthesis-delimited region (marked by
quasiquote) and a set of other parenthesis-delimited regions (marked by
unquote), we can go on to talk about regions between quasiquoted regions, regions between those regions, and so on.
If you think of values with holes as being functions, then the notion that this is a “higher-order” quasiquotation is clear: Each quasiquotation determines a value of type
(c SExpr -> SExpr), the next higher degree of quasiquotation determines a value of type
(c (c SExpr -> SExpr) -> (c SExpr -> SExpr)), and so on, where
c is some collection like
c a = Map String a. But these functions aren’t the whole story; the quasiquotations should be able to be pulled apart like other data structures, not just filled in to create s-expressions.
I haven’t managed to write a full macroexpander for higher quasiquotation yet. I’ve written this post to share my status as it is.
Cene is a language I’ve built over the last couple of years. I’ve talked about Staccato and Tenerezza here, and that code has turned into Cene.
What sets Cene apart: Extensibility support
Cene’s design revolves around the primary idea that future generations will have better ideas for programming languages than we do, so most of what sets it apart is its support for custom languages, which mainly has to do with the design of its macroexpander.
Cene’s macroexpansion phase incrementally writes definitions (of macros, functions, etc.) to monotonic state resources using deterministic concurrency. These state resources are expressive enough that user-defined macros can use them to achieve combinations of open-world and closed-world extensibility, which is what I consider to be Cene’s primary feature.
So the Kickstarter for Red Ash is live! I have mixed feelings about it, and to explain, I’m going to have to explain my take on Mighty No. 9 and the Mega Man franchise first.
If you don’t know any of those things, well, they’re all projects that were (for the most part) led by Keiji Inafune, and they’re all about robots. I started being a Mega Man fan at a young age, and it’s funny how seriously I’ve come to take it.
With the 2011 cancellation of Mega Man Legends 3 and some further cancellations that followed, the Mega Man franchise entered a dry spell that’s still ongoing. Keiji Inafune left Capcom, started up Comcept, and eventually unveiled the Mighty No. 9 Kickstarter to great success in 2013. To most people, Mighty No. 9 is a “spiritual successor” of the Mega Man franchise. Likewise, to most people, Red Ash is now a revival of Mega Man Legends 3 in particular.
If I want some simple nostalgic enjoyment like Yooka-Laylee, I’ll buy it off the (virtual) shelf; I don’t need to back it. I back a project when I want it to exist when it otherwise couldn’t, or if I consider it to have positive cultural impact.
Mighty No. 9: Telling stories about responsibility
The Mighty No. 9 Kickstarter was meaningful to me because it was a new launching point for Keiji Inafune to build story worlds.