import type { ToNumberOptions } from "../number/coerce";
export interface ToIntegerOptions extends ToNumberOptions {
    strategy?: "round" | "floor" | "ceil";
}
/**
 * Converts a boolean value to an integer.
 *
 * @param input The value to convert.
 * @returns The integer value of the input, or `null` if the input is not a boolean.
 */
export declare function booleanToInteger(input: unknown): number | null;
/**
 * Converts a big integer value to an integer.
 *
 * @param input The value to convert.
 * @returns The integer value of the input, or `null` if the input is not a big integer.
 */
export declare function bigIntToInteger(input: unknown): number | null;
/**
 * Converts a date value to an integer.
 *
 * @param input The value to convert.
 * @returns The integer value of the input, or `null` if the input is not a date.
 */
export declare function dateToInteger(input: unknown): number | null;
/**
 * Converts a string value to an integer.
 *
 * @param input The value to convert.
 * @param options The options to use.
 * @returns The integer value of the input, or `null` if the input is not a string.
 */
export declare function stringToInteger(input: unknown, options?: ToIntegerOptions): number | null;