miniblog.

ASTs typically discard comments, and that's usually what you want. The only time (AFAICS) that preserving comments is useful is for writing a code formatter. Could you write a formatter in terms of a list of lexemes? A CST is a non-trivial bit of code for one use case.

Over a sufficiently long time horizon, all code you write is legacy code.

Today I learnt that Emacs 28 shipped a context-menu-mode! https://oylenshpeegul.gitlab.io/blog/posts/20230129/ This seems quintessentially Emacs: deeply hackable, but building UI features in an order very different to the mainstream.