foo()
foo_bar()
f42()

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

[
	["function", "foo"],
	["punctuation", "("],
	["punctuation", ")"],

	["function", "foo_bar"],
	["punctuation", "("],
	["punctuation", ")"],

	["function", "f42"],
	["punctuation", "("],
	["punctuation", ")"]
]

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

Checks for functions.