/**
 * Optional Clause Processing Module for Legal Markdown Documents
 *
 * This module provides functionality to process conditional clauses in Legal Markdown
 * documents, allowing for dynamic content inclusion based on metadata conditions.
 * It supports complex boolean logic with AND/OR operations, equality comparisons,
 * and nested value access for sophisticated document customization.
 *
 * Features:
 * - Conditional clause syntax: [content]{condition}
 * - Boolean logic with AND/OR operations
 * - Equality and inequality comparisons
 * - Nested metadata value access with dot notation
 * - Type-aware value comparison (strings, numbers, booleans)
 * - Graceful error handling for invalid conditions
 * - Support for quoted string values in conditions
 *
 * @example
 * ```typescript
 * import { processOptionalClauses } from './clause-processor';
 *
 * const content = `
 * This agreement [includes confidentiality clauses]{confidentiality}
 * [and has a termination period of {{termination_days}} days]{termination_days}
 * [with special provisions for European clients]{client.region = "EU"}.
 * `;
 *
 * const metadata = {
 *   confidentiality: true,
 *   termination_days: 30,
 *   client: { region: "EU" }
 * };
 *
 * const processed = processOptionalClauses(content, metadata);
 * console.log(processed);
 * // Output:
 * // This agreement includes confidentiality clauses
 * // and has a termination period of 30 days
 * // with special provisions for European clients.
 * ```
 *
 * @module
 */
/**
 * Processes optional clauses in a LegalMarkdown document
 *
 * Evaluates conditional clauses using the syntax [content]{condition} and includes
 * or excludes content based on metadata values. Supports complex boolean logic
 * and various comparison operators for sophisticated document customization.
 *
 * @param {string} content - The document content containing optional clauses
 * @param {Record<string, any>} metadata - Document metadata with clause conditions
 * @returns {string} Processed content with conditional clauses evaluated
 * @example
 * ```typescript
 * // Simple boolean condition
 * const content1 = '[This clause is included]{include_special}';
 * const metadata1 = { include_special: true };
 * const result1 = processOptionalClauses(content1, metadata1);
 * // Output: "This clause is included"
 *
 * // Complex condition with AND/OR logic
 * const content2 = '[Premium features available]{premium = true AND region != "restricted"}';
 * const metadata2 = { premium: true, region: "US" };
 * const result2 = processOptionalClauses(content2, metadata2);
 * // Output: "Premium features available"
 *
 * // Nested metadata access
 * const content3 = '[European compliance required]{client.location.country = "DE"}';
 * const metadata3 = { client: { location: { country: "DE" } } };
 * const result3 = processOptionalClauses(content3, metadata3);
 * // Output: "European compliance required"
 * ```
 */
export declare function processOptionalClauses(content: string, metadata: Record<string, any>): string;
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