Feature #5643

require/load options and binding option

Added by Thomas Sawyer over 2 years ago. Updated over 1 year ago.

[ruby-core:41082]
Status:Assigned
Priority:Normal
Assignee:Yukihiro Matsumoto
Category:-
Target version:next minor

Description

Current Kernel#load is defined as:

load(filename, wrap=false)

I purpose that it be modified to work as option argument, e.g.

load(filename, :wrap=>true)

Right off the bat this has better name connascence.

Then support an additional option :binding, such that, given:

$ cat lib/example.rb
def a
  1
end

then

class X
  load('example.rb', :binding=>binding)
end

X.new.a  #=> 1

The binding option should also work with #require (which would also support option parameter) differing from #load in the it would only allow the feature to be loaded once per-binding's self regardless of being required again.

This ability would greatly benefit systems that need "plugin" capability. Presently, a great deal of coding has to go into simulating this functionality to create plugin systems, which are often imperfect nor robust.

History

#1 Updated by Yusuke Endoh about 2 years ago

  • Status changed from Open to Assigned
  • Assignee set to Yukihiro Matsumoto

#2 Updated by Koichi Sasada over 1 year ago

  • Target version changed from 2.0.0 to next minor

I changed target to next minor because no discussion on it.

#3 Updated by Thomas Sawyer over 1 year ago

I think someone else recently suggested that the wrap argument be able to be a module which the code is then evaluated under, instead of toplevel. Considering that, maybe :wrap option should be used for all cases and it can just handle any of boolean, module or binding accordingly.

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