Feature #19232: add NoMatchingPatternError#matchee

• Status: Feedback
• Assignee: -
• Target version: -

[dalexj (alex jensen)]

currently if you pattern match a Hash, you can inspect the #key and #matchee methods from the NoMatchingPatternKeyError

begin
  { error: true } => { value: }
rescue NoMatchingPatternKeyError => e
  e.matchee
end
# => {:error=>true}

I would find it very helpful for this functionality to be available for the standard NoMatchingPatternError without hash key matching
proposed:

begin
  [:error, "message"] => [:ok, value]
rescue NoMatchingPatternError => e
  e.matchee
end
# => [:error, "message"]

[ktsj (Kazuki Tsujimoto)]

• Status changed from Open to Feedback

Do you have any real use case for this?