vm_method.c: add top-level ruby2_keywords

This is a top-level version of Module#ruby2_keywords.
It can be used for functions (top-level methods) that delegates
arguments.  [Feature #16364]

1 files changed, 12 insertions, 0 deletions

diff --git a/test/ruby/test_keyword.rb b/test/ruby/test_keyword.rb
index 29335a4963..862b6733ea 100644
--- a/test/ruby/test_keyword.rb
+++ b/test/ruby/test_keyword.rb
@@ -2985,6 +2985,18 @@ class TestKeywordArguments < Test::Unit::TestCase
     assert_raise(FrozenError) { c.send(:ruby2_keywords, :baz) }
   end
 
+  def test_top_ruby2_keywords
+    assert_in_out_err([], <<-INPUT, ["[1, 2, 3]", "{:k=>1}"], [])
+      def bar(*a, **kw)
+        p a, kw
+      end
+      ruby2_keywords def foo(*a)
+        bar(*a)
+      end
+      foo(1, 2, 3, k:1)
+    INPUT
+  end
+
   def test_dig_kwsplat
     kw = {}
     h = {:a=>1}