From: mame@...
Date: 2019-06-12T12:13:31+00:00
Subject: [ruby-core:93067] [Ruby trunk Feature#15915] `@1` cannot get from	meta-programming

Issue #15915 has been updated by mame (Yusuke Endoh).


> What is the use case?

OP says a debugger.  The motivation looks reasonable to me.

> And how do you want it to be made possible?

I think it would be technically possible.

If this ticket is accepted, `Binding#local_variables` should include numbered parameters.  It might be good to allow a symbol like `:@1`.

(I'm negative against numbered parameters themselves, though.)

----------------------------------------
Feature #15915: `@1` cannot get from meta-programming
https://bugs.ruby-lang.org/issues/15915#change-78477

* Author: znz (Kazuhiro NISHIYAMA)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
I think no way to get `@1` from meta-programming, so debugger is hard to inspect it.

~~~
% ruby -e 'proc{@1;binding.local_variable_get("@1")}.call(1)'
Traceback (most recent call last):
	2: from -e:1:in `<main>'
	1: from -e:1:in `block in <main>'
-e:1:in `local_variable_get': wrong local variable name `@1' for #<Binding:0x00007f952401e490> (NameError)
~~~



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