[ruby-core:114535] [Ruby master Bug#19851] Ripper returns and extra block argument for :params with :args_forward
From:
"thyresias (Thierry Lambert) via ruby-core" <ruby-core@...>
Date:
2023-08-25 14:19:16 UTC
List:
ruby-core #114535
Issue #19851 has been reported by thyresias (Thierry Lambert).
----------------------------------------
Bug #19851: Ripper returns and extra block argument for :params with :args_forward
https://bugs.ruby-lang.org/issues/19851
* Author: thyresias (Thierry Lambert)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x64-mingw-ucrt]
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
```ruby
require 'ripper'
class BasicParser < Ripper
EVENTS.each do |event|
module_eval(<<~RUBY, __FILE__, __LINE__ + 1)
def on_#{event}(*args)
puts "#{event}(\#{args.inspect})"
args.unshift :#{event}
args
end
RUBY
end
end
BasicParser.new('def m(...); end').parse
# stdout:
# kw(["def"])
# sp([" "])
# ident(["m"])
# lparen(["("])
# op(["..."])
# args_forward([])
# params([nil, nil, nil, nil, nil, [:args_forward], :&])
```
I would have expected the last `:params` argument to be `nil`, not `:&`.
--
https://bugs.ruby-lang.org/
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