Simplify parser_state constructor

This simplifies the parser_state constructor by having it accept a
parser_flags parameter.

gdb/parse.c

@@ -398,11 +398,8 @@ parse_exp_in_context (const char **stringptr, CORE_ADDR pc,
      to the value matching SELECTED_FRAME as set by get_current_arch.  */
 
   parser_state ps (lang, get_current_arch (), expression_context_block,
-		   expression_context_pc,
-		   (flags & PARSER_COMMA_TERMINATES) != 0,
-		   *stringptr,
-		   completer != nullptr, tracker,
-		   (flags & PARSER_VOID_CONTEXT) != 0);
+		   expression_context_pc, flags, *stringptr,
+		   completer != nullptr, tracker);
 
   scoped_restore_current_language lang_saver;
   set_language (lang->la_language);

gdb/parser-defs.h

@@ -146,19 +146,18 @@ struct parser_state : public expr_builder
 		struct gdbarch *gdbarch,
 		const struct block *context_block,
 		CORE_ADDR context_pc,
-		int comma,
+		parser_flags flags,
 		const char *input,
 		bool completion,
-		innermost_block_tracker *tracker,
-		bool void_p)
+		innermost_block_tracker *tracker)
     : expr_builder (lang, gdbarch),
       expression_context_block (context_block),
       expression_context_pc (context_pc),
-      comma_terminates (comma),
+      comma_terminates ((flags & PARSER_COMMA_TERMINATES) != 0),
       lexptr (input),
       parse_completion (completion),
       block_tracker (tracker),
-      void_context_p (void_p)
+      void_context_p ((flags & PARSER_VOID_CONTEXT) != 0)
   {
   }
 

gdb/rust-parse.c

@@ -2310,7 +2310,7 @@ rust_lex_tests (void)
 {
   /* Set up dummy "parser", so that rust_type works.  */
   struct parser_state ps (language_def (language_rust), target_gdbarch (),
-			  nullptr, 0, 0, nullptr, 0, nullptr, false);
+			  nullptr, 0, 0, nullptr, 0, nullptr);
   rust_parser parser (&ps);
 
   rust_lex_test_one (&parser, "", 0);