A wonderful property of lisps is that you can usually parse unfinished code into raw sexps. This is really handy when building editor tools.
miniblog.
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I had a third attempt at porting difftastic from Dijkstra to A*, and I've eventually concluded that A* just isn't worth it for the implementation complexity.
I had fun writing it up though, and I've even attempted ASCII art for building intuitions:
Anthropic used Claude to write a C compiler in Rust (CCC). I've really enjoyed following the discussion.
The initial post shows how they wrote the harness with GCC as an oracle and a prompt specifying a design using SSA. The author has clear domain expertise.
https://www.anthropic.com/engineering/building-c-compiler
I've been building an 'extract function' refactor feature. It's surprisingly nuanced.
Where do you put the extracted function? Once you've done the static analysis, what order do you use for the parameters?