From: "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>
Date: 2013-08-12T23:31:13+09:00
Subject: [ruby-core:56580] [CommonRuby - Feature #8643] Add Binding.from_hash


Issue #8643 has been updated by rosenfeld (Rodrigo Rosenfeld Rosas).


For that tiny script, this is true, Koichi, but usually we get a binding from some class, so all methods would be available as well as other intermediary local variables in the method calling erb#results.

Like this:

class A
  def a
    1
  end

  def b
    eval 'p a', binding
  end
end
A.new.b # a has leaked

----------------------------------------
Feature #8643: Add Binding.from_hash
https://bugs.ruby-lang.org/issues/8643#change-41115

Author: rosenfeld (Rodrigo Rosenfeld Rosas)
Status: Open
Priority: Normal
Assignee: ko1 (Koichi Sasada)
Category: 
Target version: 


Binding.from_hash would work like:

class Binding
  def self.from_hash(hash)
    OpenStruct.new(hash){ binding }
  end
end

It would simplify things like:

ERB.new(IO.read 'template.erb').result Binding.from_hash(template_local: 'example')

Or if you need to eval some code in another process (JRuby, for instance) and need to pass some arguments to the eval code in a hash form.

I didn't want to pollute Hash by adding Hash#to_binding. I believe Binding.from_hash is more appropriate.


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