declare type Truthy<T> = T extends null | undefined | false | '' | 0 ? never : T;
export declare function assert<T>(b: T, msg?: string): asserts b is Truthy<T>;
export declare function assertString(v: unknown): asserts v is string;
export declare function assertNumber(v: unknown): asserts v is number;
export declare function assertBoolean(v: unknown): asserts v is boolean;
export declare function assertObject(v: unknown): asserts v is Record<string, unknown>;
export declare function assertArray(v: unknown): asserts v is unknown[];
export declare function invalidType(v: unknown, t: string): string;
export declare function throwInvalidType(v: unknown, t: string): never;
export declare function assertNotNull<T>(v: T | null): asserts v is T;
export declare function assertNotUndefined<T>(v: T | undefined): asserts v is T;
export declare function assertInstanceof<T>(v: unknown, t: new (...args: unknown[]) => T): asserts v is T;
export declare function assertUint8Array(v: unknown): asserts v is Uint8Array;
export {};