export interface ToNumberOptions {
    parser?: "Number" | "parseFloat" | "parseInt";
    radix?: number;
}
/**
 * Converts a boolean value to a number.
 *
 * @param input The value to convert.
 * @returns The number value of the input, or `null` if the input is not a boolean.
 */
export declare function booleanToNumber(input: unknown): number | null;
/**
 * Converts a big integer value to a number.
 *
 * @param input The value to convert.
 * @returns The number value of the input, or `null` if the input is not a big integer.
 */
export declare function bigIntToNumber(input: unknown): number | null;
/**
 * Converts a date value to a number.
 *
 * @param input The value to convert.
 * @returns The number value of the input, or `null` if the input is not a date.
 */
export declare function dateToNumber(input: unknown): number | null;
/**
 * Converts a string value to a number.
 *
 * @param input The value to convert.
 * @param options The options to use.
 * @returns The number value of the input, or `null` if the input is not a string.
 */
export declare function stringToNumber(input: unknown, options?: ToNumberOptions): number | null;
/**
 * Converts the input to a number.
 *
 * @param input The value to convert.
 * @param options The options to use.
 * @returns The number value of the input, or `null` if the input is not a number.
 *
 * @remarks
 * Supported input types:
 * - `boolean` - `true` is `1`, `false` is `0`.
 * - `bigint` - Converted to a number.
 * - `Date` - Converted to a number.
 * - `string` - Converted to a number using `Number`, `parseFloat`, or `parseInt`.
 */
export declare function toNumber(input: unknown, options?: ToNumberOptions): number | null;