/**
 * Assert that the arguments constitute a valid range, in which
 * `min < max`, and, if present, `min <= value && value <= max`.
 *
 * @param min the lower bound of the range (inclusive)
 * @param max the upper bound of the range (inclusive)
 * @param value the optional value
 * @throws a {@link RangeError} when range or value is invalid
 */
export declare function assertValidRange(min: number, max: number, value?: number): void;
/**
 * Assert that the arguments are all integers.
 *
 * @param numbers a list of numbers
 * @throws a {@link RangeError} when any number has a fractional part
 */
export declare function assertInteger(...numbers: any[]): void;
/**
 * Assert that the arguments are all natural numbers.
 *
 * @param numbers a list of numbers
 * @throws a {@link RangeError} when any number is below zero or has a
 * fractional part
 */
export declare function assertNatural(...numbers: any[]): void;
/**
 * Assert that the arguments are all natural numbers.
 *
 * @param numbers a list of numbers
 * @throws a {@link RangeError} when any number is below 1 or has a
 * fractional part
 */
export declare function assertCounting(...numbers: any[]): void;
/**
 * Assert that the argument is or is assignable to an integral {@link Number}
 * type, and downcast it to a primitive.
 *
 * @param n a numeric type (note: though constrained in type, will not prevent
 * passing a type convertable with `Number()` in plain JavaScript.
 * @returns  a primitive integer
 * @throws when encounters numeric arguments with a fractional component,
 * or when outside of safe integer range.
 */
export declare function castInteger<N extends Number>(n: N): number;