re PR c++/12226 (g++ fails to enforce accessibility requirement for copy constructor)
PR c++/12226
* call.c (CHECK_COPY_CONSTRUCTOR_P): New macro.
(reference_binding): Set it when appropriate.
(build_temp): New function, split out from ...
(convert_like_real): ... here. Honor CHECK_COPY_CONSTRUCTOR_P.
(initialize_reference): Likewise.
PR c++/13536
* parser.c (cp_parser): Add in_type_id_in_expr_p.
(cp_parser_new): Initialize it.
(cp_parser_postfix_expression): Set it.
(cp_parser_sizeof_operand): Likewise.
(cp_parser_parameteR_declaration): Do not commit early to tenative
parsers when in_type_id_in_expr_p is set.