As of Ruby version 3.0,
SortedSet is not included in the standard library, as it was in previous releases. Instead, Ruby raises an informative error when this class is referenced:
SortedSetclass has been extracted from the
setlibrary. You must use the
sorted_setgem or other alternatives.
❯ irb irb(main):001:0> SortedSet /ruby/3.1.0/lib/ruby/3.1.0/set/sorted_set.rb:4:in `rescue in <top (required)>': The `SortedSet` class has been extracted from the `set` library. You must use the `sorted_set` gem or other alternatives. (RuntimeError) from /ruby/3.1.0/lib/ruby/3.1.0/set/sorted_set.rb:1:in `<top (required)>' from <internal:/ruby/3.1.0/lib/ruby/site_ruby/3.1.0/rubygems/core_ext/kernel_require.rb>:85:in `require' from <internal:/ruby/3.1.0/lib/ruby/site_ruby/3.1.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
This error is helpful for engineers as they migrate programs to run on Ruby 3. However, it causes problems for Ruby programs that use meta-programming to walk the object graph. When such a program visits the
SortedSet constant, the informative error causes the program to fail.
faux_sorted_set library provides a solution: a minimal
SortedSet implementation that prevents Ruby from raising the informative error. To save resources, the library has a minimal size and no dependencies.
Warning: the provided
SortedSet does not sort its contents. Do not use this library if you want to use a
Add this line to your application's Gemfile:
gem 'faux_sorted_set', require: false
And then execute:
Or install it yourself as:
gem install faux_sorted_set
SortedSet class provided by this gem doesn't do any sorting and instead behaves just like a standard
Set. Please don't use it. It'll only lead to confusion. If you want a legitimate
SortedSet implementation, please evaluate knu/sorted_set.
After checking out the repo, run
bin/setup to install dependencies. Then, run
rake spec to run the tests. You can also run
bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run
bundle exec rake install. To release a new version, update the version number in
version.rb, and then run
bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the
.gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/orien/faux_sorted_set.
The gem is available as open-source under the terms of the MIT License.