Issue #12043 has been updated by Nobuyoshi Nakada.


I think he wants to distinguish `self.foo` and `foo()`.
Only public methods can be candidates in the former case, but also private methods can be in the latter case.

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Feature #12043: Add a method to NoMethodError that tells if private methods are callable at the time of 
https://bugs.ruby-lang.org/issues/12043#change-56831

* Author: Yuki Nishijima
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
I've briefly talked about this to Sasada-san, but also wanted to hear from other committers. I would like to add a method to `NoMethodError` that tells whether or not private methods are callable from the line where the exception is raised. An example would be like this:

```ruby
begin
  raies "Error" # 
rescue NoMethodError => no_method_error
  no_method_error.private_method_callable? # => true
end
```

The only use case I can think of is [the spell checker in the did_you_mean gem](https://github.com/yuki24/did_you_mean/blob/c4f0247/lib/did_you_mean/spell_checkers/method_name_checker.rb#L18) and I'm not actually sure how useful it would be for others.

Please let me know what you think, I'm open to suggestions.



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