Import set 1.0.0

- SortedSet has been removed for dependency and performance reasons.
- Set#join is added as a shorthand for `.to_a.join`.
- Set#<=> is added.

https://github.com/ruby/set/blob/v1.0.0/CHANGELOG.md

3 files changed, 17 insertions, 2 deletions

diff --git a/lib/set.rb b/lib/set.rb
index 625046d37c..2bd2a0ffa5 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -641,6 +641,12 @@ class Set
     end
   end
 
+  # Returns a string created by converting each element of the set to a string
+  # See also: Array#join
+  def join(separator=nil)
+    to_a.join(separator)
+  end
+
   InspectKey = :__inspect_key__         # :nodoc:
 
   # Returns a string containing a human-readable representation of the
@@ -684,3 +690,5 @@ module Enumerable
     klass.new(self, *args, &block)
   end
 end
+
+autoload :SortedSet, "#{__dir__}/set/sorted_set"
diff --git a/lib/set.gemspec b/lib/set/set.gemspec
index 72dee127e1..e258af4978 100644
--- a/lib/set.gemspec
+++ b/lib/set/set.gemspec
@@ -1,17 +1,18 @@
 Gem::Specification.new do |spec|
   spec.name          = "set"
-  spec.version       = "0.1.0"
+  spec.version       = "1.0.0"
   spec.authors       = ["Akinori MUSHA"]
   spec.email         = ["[email protected]"]
 
   spec.summary       = %q{Provides a class to deal with collections of unordered, unique values}
   spec.description   = %q{Provides a class to deal with collections of unordered, unique values}
   spec.homepage      = "https://github.com/ruby/set"
+  spec.license       = "BSD-2-Clause"
   spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
-  spec.licenses      = ["Ruby", "BSD-2-Clause"]
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = spec.homepage
+  spec.metadata["changelog_uri"] = "https://github.com/ruby/set/blob/v#{spec.version}/CHANGELOG.md"
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
diff --git a/lib/set/sorted_set.rb b/lib/set/sorted_set.rb
new file mode 100644
index 0000000000..e4e01ba4a8
--- /dev/null
+++ b/lib/set/sorted_set.rb
@@ -0,0 +1,6 @@
+begin
+  require 'sorted_set'
+rescue ::LoadError
+  raise "The `SortedSet` class has been extracted from the `set` library." \
+        "You must use the `sorted_set` gem or other alternatives."
+end