class Ruby::Box - Documentation for Ruby 4.1

Ruby Box is designed to provide separated spaces in a Ruby process, to isolate application codes, libraries and monkey patches. Known issues Experimental warning is shown when ruby starts with RUBY_BOX=1 (specify -W:no-experimental option to hide it) Installing native extensions may fail under RUBY_BOX=1 because of stack level too deep in extconf.rb require 'active_support/core_ext' may fail under RUBY_BOX=1 Defined methods in a box may not be referred by built-in methods written in Ruby TODOs Add the loaded box on iseq to check if another box tries running the iseq (add a field only when VM_CHECK_MODE?) Assign its own TOPLEVEL_BINDING in boxes Fix calling warn in boxes to refer $VERBOSE and Warning.warn in the box Make an internal data container class Ruby::Box::Entry invisible More test cases about $LOAD_PATH and $LOADED_FEATURES.