Feature #5360


Added by trans (Thomas Sawyer) about 9 years ago. Updated almost 3 years ago.

Target version:


For meta-programming purposes I think there needs to be a way to get a BasicObject's binding.

Updated by nobu (Nobuyoshi Nakada) about 9 years ago

  • Status changed from Open to Feedback

Can you elaborate?

Updated by trans (Thomas Sawyer) about 9 years ago

Sure. I think the most obvious usecase is with ERB. If I want to strictly control the available interface to an ERB template a subclass of BasicObject is an ideal way to do. But ERB's result method takes a binding. So that's one specific case I've come across, and I am certain there are others given that both BasicObject and binding are very useful devices in the context of meta-programming.


Updated by kernigh (George Koehler) about 9 years ago

I can get a Binding from a BasicObject like so:

class Cow < BasicObject
Moo = "Moooo!"
def binding

b =
p eval("Moo", b) # => "Moooo!"
p eval("String", b) # raises NameError

This uses the syntax "::Kernel" to access a global constant.

Updated by trans (Thomas Sawyer) almost 9 years ago

On Sep 27, 3:51 pm, George Koehler wrote:

Issue #5360 has been updated by George Koehler.

I can get a Binding from a BasicObject like so:

 class Cow < BasicObject

Updated by mame (Yusuke Endoh) almost 8 years ago

  • Target version set to 2.6

Updated by naruse (Yui NARUSE) almost 3 years ago

  • Target version deleted (2.6)

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