//@private
declare module "ui/styling/css-selector-parser" {
    export interface SimpleSelector {
        pos: number;
        type: "" | "*" | "#" | "." | ":" | "[]";
        comb?: "+" | "~" | ">" | " ";
    }
    export interface SimpleIdentifierSelector extends SimpleSelector {
        ident: string;
    }
    export interface UniversalSelector extends SimpleSelector {
        type: "*";
    }
    export interface TypeSelector extends SimpleIdentifierSelector {
        type: "";
    }
    export interface ClassSelector extends SimpleIdentifierSelector {
        type: ".";
    }
    export interface IdSelector extends SimpleIdentifierSelector {
        type: "#";
    }
    export interface PseudoClassSelector extends SimpleIdentifierSelector {
        type: ":";
    }
    export interface AttributeSelector extends SimpleSelector {
        type: "[]";
        prop: string;
        test?: "=" | "^=" | "$=" | "*=" | "=" | "~=" | "|=";
        value?: string;
    }
    export function isUniversal(sel: SimpleSelector): sel is UniversalSelector;
    export function isType(sel: SimpleSelector): sel is TypeSelector;
    export function isClass(sel: SimpleSelector): sel is ClassSelector;
    export function isId(sel: SimpleSelector): sel is IdSelector;
    export function isPseudo(sel: SimpleSelector): sel is PseudoClassSelector;
    export function isAttribute(sel: SimpleSelector): sel is AttributeSelector;
    export function parse(selector: string): SimpleSelector[];
}