[PRISM] Implement NoKeywordsParameterNode

prism_compile.c

@@ -2193,6 +2193,8 @@ pm_compile_node(rb_iseq_t *iseq, const pm_node_t *node, LINK_ANCHOR *const ret,
       case PM_NIL_NODE:
         PM_PUTNIL_UNLESS_POPPED
         return;
+      case PM_NO_KEYWORDS_PARAMETER_NODE:
+        return;
       case PM_NUMBERED_REFERENCE_READ_NODE: {
         if (!popped) {
             uint32_t reference_number = ((pm_numbered_reference_read_node_t *)node)->number;

test/ruby/test_compile_prism.rb

@@ -619,6 +619,11 @@ module Prism
       test_prism_eval("[1].map { |a; b| b = 2; a + b}")
     end
 
+    def test_NoKeywordsParameterNode
+      test_prism_eval("def prism_test_no_keywords(**nil); end")
+      test_prism_eval("def prism_test_no_keywords(a, b = 2, **nil); end")
+    end
+
     def test_OptionalParameterNode
       test_prism_eval("def prism_test_optional_param_node(bar = nil); end")
     end