Support overloading of 'operator->'.

Support overloading of 'operator->'.

2010-10-19  Sami Wagiaalla  <swagiaal@redhat.com>

	 PR C++/11500:
	* valarith.c (value_x_unop): Handle STRUCTOP_PTR.
	* eval.c (evaluate_subexp_standard): Check for overload of
	'operator->'.
	* valarith.c (value_x_binop): Throw NOT_FOUND_ERROR.
	(value_x_unop): Ditto.
	* valops.c: Include "exceptions.h".
	(find_overload_match): Throw NOT_FOUND_ERROR.
	(value_struct_elt): Ditto.

2010-10-19  Sami Wagiaalla  <swagiaal@redhat.com>

	* gdb.cp/smartp.exp: New test.
	* gdb.cp/smartp.cc : New test.