foo:after {
foo::first-letter {

foo:nth-child(2n+1) {

foo.bar {

foo#bar {

#foo > .bar:not(baz):after {

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

[
	["selector", [
		"foo",
		["pseudo-element", ":after"]
	]], ["punctuation", "{"],

	["selector", [
		"foo",
		["pseudo-element", "::first-letter"]
	]], ["punctuation", "{"],

	["selector", [
		"foo",
		["pseudo-class", ":nth-child(2n+1)"]
	]], ["punctuation", "{"],

	["selector", [
		"foo",
		["class", ".bar"]
	]], ["punctuation", "{"],

	["selector", [
		"foo",
		["id", "#bar"]
	]], ["punctuation", "{"],

	["selector", [
		["id", "#foo"],
		" > ",
		["class", ".bar"],
		["pseudo-class", ":not(baz)"],
		["pseudo-element", ":after"]
	]], ["punctuation", "{"]
]

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

Checks for pseudo-elements, pseudo-classes, classes and ids inside selectors.