From: "trans (Thomas Sawyer)" <transfire@...>
Date: 2012-12-22T01:27:01+09:00
Subject: [ruby-core:51063] [ruby-trunk - Feature #5643] require/load options and binding option


Issue #5643 has been updated by trans (Thomas Sawyer).


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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Feature #5643: require/load options and binding option
https://bugs.ruby-lang.org/issues/5643#change-34990

Author: trans (Thomas Sawyer)
Status: Assigned
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: 
Target version: next minor


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.



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