foo() if $x;
bar() unless $x;

##</code><code>##

{                  | for my $b ( $x )   | for $x -> my $b
  my $b = $x;      | {                  | {
  foo() if $b;     |   foo() if $b;     |   foo() if $b;
  bar() unless $b; |   bar() unless $b; |   bar() unless $b;
}                  | }                  | }

##</code><code>##

foo() else bar() if $x;