re PR c++/9109 (parse ambiguity)

re PR c++/9109 (parse ambiguity)

cp:
	PR c++/9109
	* parser.c (cp_parser_declarator_kind): New enum.
	(cp_parser_declarator): Adjust.
	(cp_parser_direct_declarator): Adjust. Allow for either named or
	abstract declarator. Prefer abstract, if possible. Allow
	parenthesized function name.
	(cp_parser_condition): Adjust cp_parser_declarator call.
	(cp_parser_explicit_instantiation): Likewise.
	(cp_parser_init_declarator): Likewise.
	(cp_parser_type_id): Likewise.
	(cp_parser_function_definition): Likewise.
	(cp_parser_member_declaration): Likewise.
	(cp_parser_parameter_declaration): Use cp_parser_declarator to do
	the tentative parsing.
	(cp_parser_exception_declaration): Likewise.
testsuite:
	* g++.dg/parse/ambig1.C: New test.
	* g++.dg/parse/defarg2.C: New test.

From-SVN: r60944