Add a flag for arguments that contain forwarding

Author: kddnewton

config.yml

@@ -647,14 +647,16 @@ tokens:
 flags:
   - name: ArgumentsNodeFlags
     values:
+      - name: CONTAINS_FORWARDING
+        comment: "if the arguments contain forwarding"
       - name: CONTAINS_KEYWORDS
-        comment: "if arguments contain keywords"
+        comment: "if the arguments contain keywords"
       - name: CONTAINS_KEYWORD_SPLAT
-        comment: "if arguments contain keyword splat"
+        comment: "if the arguments contain a keyword splat"
       - name: CONTAINS_SPLAT
-        comment: "if arguments contain splat"
+        comment: "if the arguments contain a splat"
       - name: CONTAINS_MULTIPLE_SPLATS
-        comment: "if arguments contain multiple splats"
+        comment: "if the arguments contain multiple splats"
     comment: Flags for arguments nodes.
   - name: ArrayNodeFlags
     values:

src/prism.c

@@ -14180,6 +14180,7 @@ parse_arguments(pm_parser_t *parser, pm_arguments_t *arguments, bool accepts_for
 
                         argument = (pm_node_t *) pm_forwarding_arguments_node_create(parser, &parser->previous);
                         parse_arguments_append(parser, arguments, argument);
+                        pm_node_flag_set((pm_node_t *) arguments->arguments, PM_ARGUMENTS_NODE_FLAGS_CONTAINS_FORWARDING);
                         arguments->has_forwarding = true;
                         parsed_forwarding_arguments = true;
                         break;