re PR c++/25635 (Bogus cruft in error message for invalid operator declaration)

	PR c++/25635
	* class.c (add_method): Set TYPE_HAS_CONVERSION for classes with a
	conversion operator.
	* decl.c (grokdeclarator): Do not set TYPE_HAS_CONVERSION here.
	PR c++/25638
	* class.c (add_method): Never associate more than one destructor
	with a single class.
	PR c++/25637
	* cp-tree.h (do_friend): Adjust prototype.
	* decl.c (grokfndecl): Make funcdef_flag a bool, not an int.
	(grokdeclarator): Likewise.  Refine check for invalid
	declarations/definitions of member functions outside of their own
	class.
	* friend.c (do_friend): Make funcdef_flag a bool, not an int.
	PR c++/25633
	* parser.c (cp_parser_mem_initializer_list): Check result of
	cp_parser_mem_initializer against error_mark_node, not NULL_TREE.
	(cp_parser_mem_initializer): Return error_mark_node for failure.
	PR c++/25634
	* parser.c (cp_parser_template_parameter_list): Call
	begin_template_parm_list and end_template_parm_list here.
	(cp_parser_type_parameter): Not here.
	(cp_parser_template_declaration_after_export): Or here.
	(cp_parser_elaborated_type_specifier): Call
	cp_parser_check_template_parameters.
	* tree.c (build_target_expr_with_type): Use force_target_expr.
	PR c++/25635
	* g++.dg/parse/operator6.C: New test.
	PR c++/25637
	* g++.dg/parse/error29.C: New test.
	PR c++/25638
	* g++.dg/parse/dtor6.C: New test.
	PR c++/25633
	* g++.dg/parse/ctor3.C: New test.
	PR c++/25634
	* g++.dg/template/class3.C: New test.

From-SVN: r109270