[ruby-core:105845] [Ruby master Feature#12495] Make "private" return the arguments again, for chaining

Issue #12495 has been updated by Eregon (Benoit Daloze).


:+1:

Note there is some inconsistency with e.g. `attr_reader` always returning an array (#6470):
```ruby
class F
  attr_reader :a # => [:a]
end
```
But I think it does not matter too much.

`private` also accepts a single Array argument since #17314, so such decorators should probably always accept either an Array or a Symbol.

----------------------------------------
Feature #12495: Make "private" return the arguments again, for chaining
https://bugs.ruby-lang.org/issues/12495#change-94379

* Author: herwinw (Herwin Quarantainenet)
* Status: Open
* Priority: Normal
----------------------------------------
Ruby 2.1 introduced the feature to make `def foo` return the symbol, so this could be used by things like `private` (see #3753):

```ruby
private def foo() end
```

You could use the same method to create your own decorators (name borrowed from Python)

```ruby
def cached(name)
  # Rewrite method to include a cache
  return name
end

private cached def foo() end
```

Currently, this would work but `cached private def foo()` would not. `private` (and all other modifier functions) return the class on which it was called. It would be nice to exterminate those order-dependencies.


The attached patch fixes this. It includes three modes:

No arguments: return `nil`:

```ruby
private
  def foo() end
```

One argument: return the symbol. The would be the most common use case for this example.

```ruby
private def foo() end
private :bar
```

Multiple arguments: return an array of the arguments:

```ruby
private :foo, :bar
```

---Files--------------------------------
ruby_return_symbols_in_private.diff (1.19 KB)


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