[ruby-core:90864] [Ruby trunk Feature#14344] refine at class level

[dementiev.vm@gmail.com]

Issue #14344 has been updated by palkan (Vladimir Dementyev).


I'm also also using refinements a lot and in most cases I use "inlined" refinements, so would be glad to have a shorter syntax (and, actually, have been thinking about it for a long time and was going to propose a feature–and found this ticket).

I was thinking about a syntax proposed by Benoit:

```ruby
using do
  refine Array do 
    # ...
  end
end
```

> I believe changing the semantics of refine (to be using+Module.new+refine) based on whether the receiver is a Class or Module is not acceptable.

What if we change it only for top-level `refine`?

```ruby
# this works
refine String do
  # ...
end

module Something
  # this raises an exception
  refine ...
end

class AnotherThing
  # and this raises
  refine ...
end
```

This could be implemented just as syntactic sugar (by defining a `refine` method on vm top).




----------------------------------------
Feature #14344: refine at class level
https://bugs.ruby-lang.org/issues/14344#change-76049

* Author: kddeisz (Kevin Deisz)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
I rely on refinements a lot, but don't want to keep writing `Module.new` in code. I'm proposing `Object::refine`, which would create an anonymous module behind the scenes with equivalent functionality. So:

~~~ ruby
class Test
  using Module.new {
    refine String do
      def refined?
        true
      end
    end
  }
end
~~~

would become

~~~ ruby
class Test
  refine String do
    def refined?
      true
    end
  end
end
~~~

It's a small change, but reads a lot more clearly. Thoughts?



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