From: "shugo (Shugo Maeda)" <noreply@...>
Date: 2021-11-16T04:43:33+00:00
Subject: [ruby-core:106076] [Ruby master Feature#12737] Module#defined_refinements

Issue #12737 has been updated by shugo (Shugo Maeda).


Eregon (Benoit Daloze) wrote in #note-4:
> Should the code in the description be `p M.defined_refinements`?

Yes.

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

Forget the following example.  It was not a good idea.

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

Module#defined_refinements is a reflection API for debugging purposes.
You can get a similar result of Module.used_refinements using Module.use_modules and Module#defined_refinements except that Module.used_refinements only returns refinements defined at the time when modules are used.


----------------------------------------
Feature #12737: Module#defined_refinements
https://bugs.ruby-lang.org/issues/12737#change-94665

* 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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