From: sawadatsuyoshi@...
Date: 2019-02-05T04:42:50+00:00
Subject: [ruby-core:91404] [Ruby trunk Feature#15574] Prohibit to pass a block on super() implicitly

Issue #15574 has been updated by sawa (Tsuyoshi Sawada).


duerst (Martin D��rst) wrote:
> ko1 (Koichi Sasada) wrote:
> 
> > Why don't you pass a block parameter explicitly?
> > Because you know the spec and intentional, or simply forget to pass it (and working it with this spec fortunately)?
> 
> Until quite recently, using an explicit block parameter was (considered to be?) less efficient than an implicit block parameter.

But we can explicitly pass `yield`, can't we?

----------------------------------------
Feature #15574: Prohibit to pass a block on super() implicitly
https://bugs.ruby-lang.org/issues/15574#change-76661

* Author: ko1 (Koichi Sasada)
* Status: Open
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
* Target version: 
----------------------------------------
As described in [Feature #15554], `super()` (not `super`) pass the given block.

```
class C
  def foo
    p block_given?
  end
end

class C1 < C
  def foo
    super   #=> true
    super() #=> true
  end
end

C1.new.foo{}
```

`super` (without parameters) passes all passed parameters so it is no surprise to pass given block. 

However, `super()` (with parameters. In this case, it passes 0 parameters) also pass given block implicitly.

I'm not sure who use this behavior, but I think it is simple to prohibit such implicit block passing.




-- 
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>