[ruby-core:78402] [Ruby trunk Bug#12984] `rescue *[]` should be equivalent to `rescue` as `method_call(*[])` is equivalent to `method

< :前の番号 ^ :番号順リスト > :次の番号 P :前の記事（スレッド移動） N :次の記事（スレッド移動） |<:前のスレッド >|:次のスレッド ^ :返事先 _:自分への返事 >:同じ返事先を持つ記事（前） <:同じ返事先を持つ記事（後） ---:分割してスレッド表示、再表示 | :分割して（縦）スレッド表示、再表示 ~ :スレッドのフレーム消去 .:インデックス ..:インデックスのインデックス

Issue #12984 has been updated by bug hit.


bug hit wrote:
> Nobuyoshi Nakada wrote:
> > It's similar to:
> > 
> > ```ruby
> > super(*[])
> > ```
> 
> I guess there's some similarity.  But super has a very explicit definition.  Only a naked super is auto-forwarding, any attempt to pass args turns it into manual super. So `super(*[])` is equivalent to `super()`, which makes sense, because by doing `super(*array)` you are clearly trying to call explicit super.

The difference between rescue and super is that there is such a thing as an explicit empty `super()` that passes nothing, but there is no corresponding explicit empty `rescue()` that rescues nothing, and so rescue *[] manifests something that isn't supposed to exist.


----------------------------------------
Bug #12984: `rescue *[]` should be equivalent to `rescue` as `method_call(*[])` is equivalent to `method_call`
https://bugs.ruby-lang.org/issues/12984#change-61777

* Author: bug hit
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-linux]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
----------------------------------------
splatting an empty array to a construct that takes a list is suppose to be equivalent to specifying no list

```ruby
def foo
end

foo *[] #works

```

so `rescue *[]` should be equivalent to `rescue`

```ruby
begin
  raise 'error' #Uncaught exception
rescue *[]
  puts 'caught'
end
```




-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>