[ruby-core:108965] [Ruby master Feature#18159] Integrate functionality of dead_end gem into Ruby

Issue #18159 has been updated by schneems (Richard Schneeman).


Thank you everyone for your help so far. This is very exciting!

> like renaming

I did some brainstorming. I think having the word "syntax" in the name will help people remember or find it. Originally I scoped this to keywords `do` and `end` and `def` but over time it also proves good at finding other things like missing pairs `()`, `{}`, `[]` so the word "syntax" is more general. Here are some ideas for names that use `syntax`:

- did_you_syntax
- syntax_explain
- what_syntax
- syntax_unroll
- syntax_clippy
- syntax_suggest
- syntax_guide
- syntax_shepherd
- syntax_fix

I think `syntax_suggest` maps well because it suggests areas that might be causing problems. In the same way `did_you_mean` is not called "method finder" etc. it is merely a suggestion. I am curious for your feedback and opinions on the name.

We do still mention the name of the gem in the environment variable when a search times out `Search timed out DEAD_END_TIMEOUT=#{timeout}...`. Once we decide on a name we can update the internals.

> separating dead_end command from the gem, etc.

Previously we talked about not shipping the gem CLI with Ruby. The CLI is used in two places: for the vscode extension and for my debugging. I think both situations are edge cases for now. The extension has a few hundred downloads. I removed any CLI reference from the gem's output already. Is it okay if you don't get the cli with the default gem, but it's available via `gem install <name tbd>` ?

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Feature #18159: Integrate functionality of dead_end gem into Ruby
https://bugs.ruby-lang.org/issues/18159#change-98066

* Author: duerst (Martin D端rst)
* Status: Open
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
* Target version: 3.2
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Missing 'end' errors are difficult to fix. We should integrate the functionality of the dead_end gem (https://github.com/zombocom/dead_end) into Ruby similar to how we integrated did_you_mean. It would greatly help programming Ruby, in particular for beginners.

See also Ruby Kaigi Takeout 2021 talk by Richard Schneeman https://rubykaigi.org/2021-takeout/presentations/schneems.html.



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