[ruby-core:105816] [Ruby master Feature#12737] Module#defined_refinements

Issue #12737 has been updated by Eregon (Benoit Daloze).


Should the code in the description be `p M.defined_refinements`?

I'm not sure to understand the use case, isn't `using M` doing the same as that `for`?

----------------------------------------
Feature #12737: Module#defined_refinements
https://bugs.ruby-lang.org/issues/12737#change-94337

* Author: shugo (Shugo Maeda)
* Status: Assigned
* Priority: Normal
----------------------------------------
How about to provide Module#defined_refinements, which returns the refinements defined in the receiver as a Hash, as follows:

```
module M
  refine String do
    $M_String = self
  end

  refine Integer do
    $M_Integer = self
  end
end

p Module.defined_refinements #=> {String => $M_String, Integer => $M_Integer}
```

By `Module#defined_refinements`, you can activate refinements globally:

```
for klass, refinement in Module.defined_refinements
  klass.prepend(refinement)
end
```




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