Elisp has no namespaces. Some tools actually take advantage of this: completion with all known functions can work really well for discovery!
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Claude asked me a question today: was I looking for an Emacs plugin (because I was talking about elisp) or a Rust program (because I have configured Rust preferences)?
I'm really impressed, it's rare to see LLMs ask follow-up questions.
(I wanted Emacs in this case.)
tree-sitter-elisp now has basic support for syntax highlighting and generating tags! https://github.com/Wilfred/tree-sitter-elisp
It works surprisingly well and runs very quickly.
One weird consequence of having '() and nil being the same in elisp: the following function is legal:
(defun foo nil 1)
It kinda makes sense, but it does read strangely.