From: knu@...
Date: 2017-09-17T10:42:40+00:00
Subject: [ruby-core:82840] [Ruby trunk Feature#13904] getter for original information of Enumerator

Issue #13904 has been updated by knu (Akinori MUSHA).

Assignee set to knu (Akinori MUSHA)

----------------------------------------
Feature #13904: getter for original information of Enumerator
https://bugs.ruby-lang.org/issues/13904#change-66732

* Author: znz (Kazuhiro NISHIYAMA)
* Status: Open
* Priority: Normal
* Assignee: knu (Akinori MUSHA)
* Target version: 
----------------------------------------
At https://gitter.im/red-data-tools/ja?at=59b0aaa097cedeb04828e268 ,
mrkn says narray and pycall use internal information of ruby to check `Range#step(n)`.

People of red-data-tools/ja suggest subclass of Enumerator.
But I think it does not match Ruby's '������������������' (I don't know this word in English), so I suggest to add some methods to Enumerator class.

proof of concept attached.

Usage:

```
% irb -r irb/completion --simple-prompt
>> e=(1..2).step(3)
=> #<Enumerator: 1..2:step(3)>
>> e.receiver
=> 1..2
>> e.method_name
=> :step
>> e.arguments
=> [3]
```

`#method` is conflict with `Kernel#method`, so use `#method_name` instead.


---Files--------------------------------
poc.diff (1.42 KB)


-- 
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>