/**
 * Value Utilities
 *
 * Common utility functions for working with different value types.
 *
 * @fileoverview Value manipulation utilities
 * @version 1.0.0
 */
export declare function isTruthy(value: unknown): boolean;
export declare function toBoolean(value: unknown, defaultValue?: boolean): boolean;
/**
 * Safely converts a value to a number.
 * Handles bigint, string, and number types.
 *
 * @param value - Value to convert (bigint, number, or string)
 * @param defaultValue - Default if conversion fails (default: 0)
 * @returns Number representation
 *
 * @example
 * ```typescript
 * toNumber(42)              // 42
 * toNumber(BigInt(100))     // 100
 * toNumber('123')           // 123
 * toNumber('invalid')       // 0 (default)
 * toNumber('invalid', -1)   // -1 (custom default)
 * ```
 */
export declare function toNumber(value: bigint | number | string | unknown, defaultValue?: number): number;
/**
 * Value validation and conversion utilities.
 */
export declare const ValueUtils: {
    /**
     * Checks if a value is a valid percentage (0-100).
     *
     * @param value - Value to check
     * @returns true if valid percentage
     */
    readonly isValidPercentage: (value: unknown) => boolean;
    /**
     * Clamps a number to a specific range.
     *
     * @param value - Value to clamp
     * @param min - Minimum value
     * @param max - Maximum value
     * @returns Clamped value
     */
    readonly clamp: (value: number, min: number, max: number) => number;
    /**
     * Checks if a value is empty (null, undefined, empty string, empty array).
     *
     * @param value - Value to check
     * @returns true if empty
     */
    readonly isEmpty: (value: unknown) => boolean;
    /**
     * Safely gets a nested property from an object.
     *
     * @param obj - Object to query
     * @param path - Dot-separated path (e.g., 'user.profile.name')
     * @param defaultValue - Default if path doesn't exist
     * @returns Property value or default
     */
    readonly getNestedProperty: (obj: unknown, path: string, defaultValue?: unknown) => unknown;
};
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