Add leading arguments support to arguments forwarding

The idFWD_KWREST sections may be wrong. However, the existing
idFWD_KWREST sections for ... without leading arguments are already
broken.

Implements [Feature #16378]

1 files changed, 11 insertions, 3 deletions

diff --git a/test/ripper/test_parser_events.rb b/test/ripper/test_parser_events.rb
index b6eeb77cda..544896b15f 100644
--- a/test/ripper/test_parser_events.rb
+++ b/test/ripper/test_parser_events.rb
@@ -132,9 +132,17 @@ class TestRipper::ParserEvents < Test::Unit::TestCase
   end
 
   def test_args_forward
-    thru_args_forward = false
-    parse('def m(...) n(...) end', :on_args_forward) {thru_args_forward = true}
-    assert_equal true, thru_args_forward
+    [
+      'def m(...) n(...) end',
+      'def m(...) end',
+      'def m(a, ...) n(1, ...) end',
+      'def m(...) n(1, ...) end',
+      'def m(a, ...) n(...) end'
+    ].each do |code|
+      thru_args_forward = false
+      parse(code, :on_args_forward) {thru_args_forward = true}
+      assert_equal true, thru_args_forward, "no args_forward for: #{code}"
+    end
   end
 
   def test_arg_paren