[

"", [],
"foo", [["error", "invalid"]],
"foo 4", [["error", "invalid"]],

"@foo", [["at-rule", "foo", [], null]],

"@charset; @foo", [
    ["error", "invalid"],
    ["at-rule", "foo", [], null]
],

"@foo bar; \t/* comment */", [["at-rule", "foo", [" ", ["ident", "bar"]], null]],

" /**/ @foo-with-block bar{[(4", [["at-rule", "foo-with-block",
    [" ", ["ident", "bar"]],
    [["[]", ["()", ["number", "4", 4, "integer"]]]]
]],

"@foo-with-block { bar", [["at-rule", "foo-with-block", [" "], [
    " ", ["ident", "bar"]]]
],
"@foo [ bar", [["at-rule", "foo", [" ", ["[]", " ", ["ident", "bar"]]], null]],

" /**/ div > p { color: #aaa;  } /**/ ", [["qualified rule",
    [["ident", "div"], " ", ">", " ", ["ident", "p"], " "],
    [" ", ["ident", "color"], ":", " ", ["hash", "aaa", "id"], ";", " "]
]],

" /**/ { color: #aaa  ", [["qualified rule",
    [],
    [" ", ["ident", "color"], ":", " ", ["hash", "aaa", "id"], " "]
]],

" /* CDO/CDC are not special */ <!-- --> {", [["qualified rule",
    ["<!--", " ", "-->", " "], []
]],

"div { color: #aaa; } p{}", [
    ["qualified rule", [["ident", "div"], " "],
        [" ", ["ident", "color"], ":", " ", ["hash", "aaa", "id"], ";", " "]
    ],
    ["qualified rule", [["ident", "p"]], []]
],

"div {} -->", [
    ["qualified rule", [["ident", "div"], " "], []],
    ["error", "invalid"]
],

"{}a", [["qualified rule", [], []], ["error", "invalid"]],
"{}@a", [["qualified rule", [], []], ["at-rule", "a", [], null]]

]