Merge pull request #3037 from infiton/rxc/declare-singleton-instance-methods

Declare Singleton::SingletonInstanceMethods

Author: soutaro

stdlib/singleton/0/singleton.rbs

@@ -124,6 +124,9 @@ module Singleton
   #
   def dup: () -> bot
 
+  module SingletonInstanceMethods
+  end
+
   module SingletonClassMethods
   end
 end

test/stdlib/singleton_test.rb

@@ -15,4 +15,10 @@ def test_instance
     assert_send_type  '() -> SingletonSingletonTest::TestClass',
                       TestClass, :instance
   end
+
+  def test_singleton_instance_methods
+    omit "SingletonInstanceMethods is not available" unless Singleton.const_defined?(:SingletonInstanceMethods, false)
+
+    assert_const_type "Module", "Singleton::SingletonInstanceMethods"
+  end
 end