From: manga.osyo@...
Date: 2019-02-07T04:13:44+00:00
Subject: [ruby-core:91446] [Ruby trunk Feature#15374] Proposal: Enable refinements to `#method_missing`

Issue #15374 has been updated by osyo (manga osyo).


Yes, it will be the specification of Ruby.
method_missing has a large side effect.
So can use `using` to control by context.

```ruby
module HashWithAsscessKeyToMethod
  refine Hash do
      # name is Symbol or String
      def method_missing(name)
          self[name] || self[name.to_s]
      end
  end
end


# Do not want to use Hash#method_missing
hash = { name: "homu", age: 14 }
pp hash[:name]    # OK
# pp hash.name    # NG


# Do want to use Hash#method_missing
using HashWithAsscessKeyToMethod
pp hash.name      # OK
```

User can choose.



----------------------------------------
Feature #15374: Proposal: Enable refinements to `#method_missing`
https://bugs.ruby-lang.org/issues/15374#change-76705

* Author: osyo (manga osyo)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
Proposal enable refinements to `#method_missing`.
It can be used in the following cases.

```ruby
# Access key value with method
using Module.new {
	refine Hash do
		# name is Symbol or String
		def method_missing(name)
			self[name.to_sym] || self[name.to_s]
		end
	end
}

hash = { name: "homu", "age" => 14 }
pp hash.name
# => "homu"
pp hash.age
# => "age"
```

`method_missing` is hard hacking.
I would like to use Refinements with `method_missing`.

pull request: https://github.com/ruby/ruby/pull/2036




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