[ruby-core:106787] [Ruby master Feature#18408] Allow pattern match to set instance variables

Issue #18408 has been updated by jeremyevans0 (Jeremy Evans).

Backport deleted (2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN)
Subject changed from Rightward assignment into instance variable to Allow pattern match to set instance variables
Tracker changed from Bug to Feature

I don't think it's a bug that pattern match only supports setting local variables.  However, I agree that it would be a useful feature for pattern match to support setting instance variables, especially now that you can pin instance variables in pattern match in Ruby 3.1.

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Feature #18408: Allow pattern match to set instance variables
https://bugs.ruby-lang.org/issues/18408#change-95490

* Author: Dan0042 (Daniel DeLorme)
* Status: Open
* Priority: Normal
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I expected this to work:

```ruby
42 => @v
```

But instead it raises "syntax error, unexpected instance variable"

Is this intentional?



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