$ perl -MO=Deparse -pe'f()'
LINE: while (defined($_ = <ARGV>)) {
    f();
}
continue {
    die "-p destination: $!\n" unless print $_;
}
-e syntax OK

##</code><code>##

for (A; B; C) {
   D;
}

##</code><code>##

A;
while (B) {
   D;
} continue {
   C;
}