PR c++/9050, DR 147, DR 318

	PR c++/9050, DR 147, DR 318
	* parser.c (cp_parser_lookup_name): If the name matches the explicit
	class scope, we're naming the constructor.
	(cp_parser_constructor_declarator_p): Just use cp_parser_unqualified_id
	if we have a nested-name-specifier.
	(cp_parser_direct_declarator): Handle getting an overload set as a
	constructor declarator.
	(cp_parser_unqualified_id): Avoid looking up the constructor when
	naming the destructor.
	(cp_parser_diagnose_invalid_type_name): Give good
	diagnostic for improper use of constructor as template.
	* typeck.c (finish_class_member_access_expr): Give good diagnostic
	about calling constructor.

	* error.c (dump_aggr_type): Don't print A::A for injected-class-name.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@154403 138bc75d-0d04-0410-961f-82ee72b054a4