import { ValidatorFn } from '@angular/forms';
/**
 * Validator function for IPv4 addresses
 *
 * @description
 * Validates that the input value matches a valid IPv4 address format.
 * Supports standard IPv4 notation (e.g., 192.168.1.1, 10.0.0.1, 255.255.255.255).
 *
 * @example
 * ```typescript
 * // Basic usage in FormControl
 * const ipControl = new FormControl('', [ipAddressValidator()]);
 *
 * // Usage in reactive forms
 * this.networkForm = this.fb.group({
 *   serverIp: ['', [Validators.required, ipAddressValidator()]]
 * });
 *
 * // Valid inputs: '192.168.1.1', '10.0.0.1', '127.0.0.1'
 * // Invalid inputs: '256.1.1.1', '192.168.1', 'invalid-ip'
 * ```
 *
 * @returns ValidatorFn that returns null if valid, or validation error object if invalid
 *
 * @since 2.0.0
 * @author Juvo Rafa Team
 */
export declare function ipAddressValidator(): ValidatorFn;