cp:
	* cp-tree.def (USING_STMT): New statement node.
	* cp-tree.h (USING_STMT_NAMESPACE): New macro.
	* decl2.c (do_using_directive): Add USING_STMT to statement
	tree. Don't emit errors when processing template decl.
	* pt.c (tsubst_expr, USING_STMT case): New case.
	* semantics.c (cp_expand_stmt, USING_STMT case): New case.
testsuite:
	* g++.old-deja/g++.ns/template17.C: New test.

From-SVN: r41724