re PR c++/45330 (Suggest likely nested-name-specifiers for undeclared identifiers.)

re PR c++/45330 (Suggest likely nested-name-specifiers for undeclared identifiers.)

gcc/cp/
	PR c++/45330
	* cp-tree.h (suggest_alternatives_for): Add location_t parameter.
	* name-lookup.c (suggest_alternatives_for): Likewise.  Adjust.
	* lex.c (unqualified_name_lookup_error): Adjust call to it.
	* semantics.c (qualified_name_lookup_error): Move to...
	* error.c (qualified_name_lookup_error): ...here.  Call.
	suggest_alternatives_for.

gcc/testsuite/
	PR c++/45330
	* g++.dg/lookup/suggestions1.C: New test.

From-SVN: r167814