$foo
$::foobar_42
$Foo::Bar_42::baz

----------------------------------------------------

[
	["variable", ["$foo"]],
	["variable", ["$", ["punctuation", "::"], "foobar_42"]],
	["variable", ["$Foo", ["punctuation", "::"], "Bar_42", ["punctuation", "::"], "baz"]]
]

----------------------------------------------------

Checks for variables.