lib/ruby30_parser.y in ruby_parser-3.16.0 vs lib/ruby30_parser.y in ruby_parser-3.17.0

@@ -1007,11 +1007,29 @@
       paren_args: tLPAREN2 opt_call_args rparen
                     {
                       _, args, _ = val
                       result = args
                     }
+                | tLPAREN2 args tCOMMA args_forward rparen
+                    {
+                      yyerror "Unexpected ..." unless
+                        self.lexer.is_local_id(:"*")  &&
+                        self.lexer.is_local_id(:"**") &&
+                        self.lexer.is_local_id(:"&")
 
+                      result = call_args val
+                    }
+                | tLPAREN2 args_forward rparen
+                    {
+                      yyerror "Unexpected ..." unless
+                        self.lexer.is_local_id(:"*")  &&
+                        self.lexer.is_local_id(:"**") &&
+                        self.lexer.is_local_id(:"&")
+
+                      result = call_args val
+                    }
+
   opt_paren_args: none
                 | paren_args
 
    opt_call_args: none
                 | call_args
@@ -2287,10 +2305,24 @@
                     {
                       result = val[1]
                       self.lexer.lex_state = EXPR_BEG
                       self.lexer.command_start = true
                     }
+                | tLPAREN2 f_arg tCOMMA args_forward rparen
+                    {
+                      result = args val
+
+                      self.lexer.lex_state = EXPR_BEG
+                      self.lexer.command_start = true
+                    }
+                | tLPAREN2 args_forward rparen
+                    {
+                      result = args val
+
+                      self.lexer.lex_state = EXPR_BEG
+                      self.lexer.command_start = true
+                    }
                 |   {
                       result = self.in_kwarg
                       self.in_kwarg = true
                       self.lexer.lex_state |= EXPR_LABEL
                     }
@@ -2386,10 +2418,15 @@
                 |
                     {
                       result = args val
                     }
 
+    args_forward: tBDOT3
+                    {
+                      result = s(:forward_args).line lexer.lineno
+                    }
+
        f_bad_arg: tCONSTANT
                     {
                       yyerror "formal argument cannot be a constant"
                     }
                 | tIVAR
@@ -2514,9 +2551,10 @@
                       result = :"**#{name}"
                     }
                 | kwrest_mark
                     {
                       result = :"**"
+                      self.env[result] = :lvar
                     }
 
            f_opt: f_arg_asgn tEQL arg_value
                     {
                       result = self.assignable val[0], val[2]