my $foo = bar('thing');

##</code><code>##

$tokens=
[
 ['my'    => "function"],
 [' '     => "whitespace"],
 ['$foo'  => "scalar"],
 [' '     => "whitespace"],
 ['='     => "operator"],
 [' '     => "whitespace"],
 ['bar'   => "function"],
 ['('     => "delimiter"],
 ['thing' => "string"],
 [')'     => "delimiter"],
 [';'     => "delimiter"]
];