1<Macro warnings $u $n $u1 $n1 $u2 $n2>
2  Warning "many warnings! $u $u1 $u2"
3  # $n $n1 $n2
4</Macro>
5
6# warn about unused arguments
7Use warnings 1 2 3 4 5 6
8
9# may warn about empty arguments?
10Use warnings '' '' '' '' '' ''
11
12Error "done!"
13