tree-sitter playground

* [tree-sitter playground](https://tree-sitter.github.io/tree-sitter/playground) For people wondering what the parsing capabilities of tree-sitter will be, or maybe hacking on or planning for some emacs modes to make use of it, I found the very helpful [tree-sitter playground](https://tree-sitter.github.io/tree-sitter/playground). Pick your language, enter some test code, click around. It's really impressive.

Awesome, it would be nice to have such feature inside emacs, like neovim has [https://github.com/nvim-treesitter/playground](https://github.com/nvim-treesitter/playground) (right now we have tree-sitter-debug-mode, but without interactivity)

Pity that LISP is missing.

Maybe I'm querying wrong, but there's no change when I write one.

Lisp might be the only language that doesn't need a parser.

I hope imenu gets a lot better thanks to this. I feel like it never shows exactly what I want except for org mode.

I was just investigating all the regex and PPSS hackery required to not-really-nail the identification of things like `x.a['key']` in python. Pages and pages of code.

I'm not a programmer but would like to understand this. Can you ELI5 to me?

Parsers convert programming language to "abstract syntax trees" (a hierarchical relationship between the "tokens" that compose a program). In Lisp, this syntax tree is inherent in the syntax (a lisp program is composed of S-expressions, which are inherently tree-like).

You mean to say there are no uses for tree-sitter in Lisp? That's absolutely not true.

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