Add ADL support

Add ADL support

2010-05-07  Sami Wagiaalla  <swagiaal@redhat.com>

	PR C++/7943:
	* valops.c (find_overload_match): Handle fsym == NULL case.
	Add int no_adl argument.
	(find_oload_champ_namespace_loop): Call make_symbol_overload_list_adl
	when appropriate.
	Add int no_adl argument.
	(find_oload_champ_namespace): 	Add int no_adl argument.
	* parse.c (operator_length_standard): Return length for OP_ADL_FUNC
	expression.
	* expprint.c (op_name_standard): Added string for OP_ADL_FUNC case.
	* eval.c (evaluate_subexp_standard): Added OP_ADL_FUNC case.
	Evaluate arguments and use them to perform ADL lookup.
	Pass no_adl argument to find_overload_match.
	Disable adl lookup when evaluating a fully qualified OP_FUNCALL.
	* cp-support.h: Added prototype for
	make_symbol_overload_list_namespace.
	* cp-support.c (make_symbol_overload_list_namespace): New function.
	(make_symbol_overload_list_adl_namespace): New function.
	(make_symbol_overload_list_adl): New function.
	(make_symbol_overload_list_using): Moved code to add function to
	overload set to make_symbol_overload_list_namespace.
	* c-exp.y: create UNKNOWN_CPP_NAME token.
	Add parse rule for ADL functions.
	(classify_name): Recognize an UNKNOWN_CPP_NAME.

2010-05-07  Sami Wagiaalla  <swagiaal@redhat.com>

	* gdb.cp/koenig.exp: New test.
	* gdb.cp/koenig.cc: New test program.