<Macro warnings $u $n $u1 $n1 $u2 $n2>
Warning "many warnings! $u $u1 $u2"
# $n $n1 $n2
</Macro>
# warn about unused arguments
Use warnings 1 2 3 4 5 6
# may warn about empty arguments?
Use warnings '' '' '' '' '' ''
Error "done!"