re PR c/23722 (bad error recovery with if blocks and else)

re PR c/23722 (bad error recovery with if blocks and else)

2007-11-26  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c/23722
	* c-parser.c (struct c_parser): New bit in_if_block.
	(c_parser_compound_statement_nostart): Handle unexpected 'else'
	keyword.
	(c_parser_statement_after_labels): Set in_if_block to false while
	parsing.
	(c_parser_if_body): Don't call c_parser_statement_after_labels if
	a semicolon is found, just consume it. Don't call
	c_parser_statement_after_labels if an open brace is found, call
	c_parser_compound_statement instead.
	(c_parser_else_body): New.
	(c_parser_if_statement): Set in_if_block to true when parsing the
	body of the 'if' statement. Use c_parser_else_body.

testsuite/
	* gcc.dg/cpp/19990413-1.c: Update.
	* gcc.dg/parse-else-error.c: New.
	* gcc.dg/parse-else-error-2.c: New.
	* gcc.dg/parse-else-error-3.c: New.
	* gcc.dg/parse-else-error-4.c: New.

From-SVN: r130446