From: Jeremy Evans <code@...>
Date: 2020-12-03T15:04:44-08:00
Subject: [ruby-core:101233] Re: [Ruby master Feature#17055] Allow suppressing uninitialized instance variable and method redefined verbose mode warnings

On 12/03 05:44, Austin Ziegler wrote:
> What does this mean?
> 
> > Considering that you can alias a method to itself to avoid the warning,
> and therefore do not need to remove the method first (which would cause a
> race condition), I am dropping my request to add
> `expected_redefined_method?(method_name)`.

As shown by Urabe-san:

```ruby
def foo
end

# This avoids the redefinition warning
alias foo foo

# This would normally result in a redefinition warning in verbose mode,
# if not for the alias above.
def foo
end
```

> I have code that I???ve written to get around some rdoc silliness that does:
> 
>   # rdoc documentation for foo.
>   attr_writer :foo
>   undef :foo=
>   def foo=(x) #:nodoc:
>     # specialized foo assignment code
>   end
> 
> If I didn???t do this, RDoc documents both the attribute and the `foo=`
> method (or it did the last time I checked) even though all I want
> documented is the attribute for readability. How would I make it so that I
> don???t need to do `undef :foo=` here, as that has been one thing that has
> failed this code (_hard_) with both type analyzers for Ruby.

This seems to be an unrelated issue.  I would avoid the attr_writer and
the undef.  If you just want RDoc to mark this as an attribute method
instead of general method, then you may want to submit a pull request to
rdoc to add markup syntax to be able to flag a regular method as an
attribute method.

Thanks,
Jeremy

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