[ruby-core:113022] [Ruby master Bug#19548] Ambiguous and confusing syntax for alias/undef arguments

Issue #19548 has been reported by hurricup (Alexandr Evstigneev).

----------------------------------------
Bug #19548: Ambiguous and confusing syntax for alias/undef arguments
https://bugs.ruby-lang.org/issues/19548

* Author: hurricup (Alexandr Evstigneev)
* Status: Open
* Priority: Normal
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
This was introduced in https://bugs.ruby-lang.org/issues/8851 and looks really confusing at least because of bare `/`. 
Here are 3 semantically similar methods, but feels like first two should not be valid:
```
def method1
  undef :*,<<,/,[]
  alias :* /
end

def method2
  undef :*,
    <<,
    /,
    []
  alias :*
  /
end

def method3
  undef :*
  undef :<<
  undef :/
  undef :[]
  alias :* :/
end

puts RubyVM::InstructionSequence.of(method :method1).disasm
puts RubyVM::InstructionSequence.of(method :method2).disasm
puts RubyVM::InstructionSequence.of(method :method3).disasm
```



-- 
https://bugs.ruby-lang.org/
 ______________________________________________
 ruby-core mailing list -- [e-mail]
 To unsubscribe send an email to [e-mail]
 ruby-core info -- https://ml.ruby-lang.org/mailman3/postorius/lists/ruby-core.ml.ruby-lang.org/