- /* Parse the type-id. */
- saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
- parser->in_type_id_in_expr_p = true;
- type = cp_parser_type_id (parser);
- parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
- /* Now, look for the trailing `)'. */
- cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
+ /* Note: as a GNU Extension, compound literals are considered
+ postfix-expressions as they are in C99, so they are valid
+ arguments to sizeof. See comment in cp_parser_cast_expression
+ for details. */
+ cp_lexer_save_tokens (parser->lexer);
+ /* Skip tokens until the next token is a closing parenthesis.
+ If we find the closing `)', and the next token is a `{', then
+ we are looking at a compound-literal. */
+ compound_literal_p
+ = (cp_parser_skip_to_closing_parenthesis (parser, false, false,
+ /*consume_paren=*/true)
+ && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE));
+ /* Roll back the tokens we skipped. */
+ cp_lexer_rollback_tokens (parser->lexer);
+ /* If we were looking at a compound-literal, simulate an error
+ so that the call to cp_parser_parse_definitely below will
+ fail. */
+ if (compound_literal_p)
+ cp_parser_simulate_error (parser);
+ else
+ {
+ bool saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
+ parser->in_type_id_in_expr_p = true;
+ /* Look for the type-id. */
+ type = cp_parser_type_id (parser);
+ /* Look for the closing `)'. */
+ cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
+ parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
+ }
+