my $aref = [1..42];
my $href = { foo => 1, bar => 2 };
my $cref = do { my @x=1..42; sub () { @x } };
my $sref = do { my $x=42; \$x };

##</code><code>##

my $aref = \@ <== 1..42;
my $href = \% <== foo => 1, bar => 2;
my $cref = \& <== 1..42;
my $sref = \$ <== 42;