import { CSSNode } from "./css/ast";
import { SqssNode } from "./sqss/ast";
export declare function trim(str: string, ch: string): string;
export declare function trimEnd(str: string, ch: string): string;
export declare function trimStart(str: string, ch: string): string;
export declare function trunkString(str: string, maxLength: number): string;
export declare function containAnyStr(str: string, subStrs: string[]): null | string;
export declare function startsWith(str: string, startStrs: string[]): null | string;
export declare function assertEqual(value: unknown, expected: unknown, message?: string): void;
export declare function assertTrue(value: unknown, message?: string): void;
export declare function isSimpleSelector(str: string): boolean;
export declare function isAttrSelector(str: string): boolean;
export declare function isPseudoElementSelector(str: string): boolean;
export declare function isPseudoClassSelector(str: string): boolean;
export declare function extractTableFromSelector(str: string): string;
export declare function isKebabCase(str: string): boolean;
export declare function isString(value: unknown): boolean;
export declare function isBool(value: unknown): boolean;
export declare function isNonNegativeInteger(value: unknown): boolean;
export declare function cartesian<T>(...allEntries: T[][]): T[][];
export declare function printTree(root: SqssNode | CSSNode, message: string): void;
export declare function xor(a: boolean, b: boolean): boolean;