import { PatternMatch } from '../../types';
/**
 * Common patterns used across languages
 */
/**
 * Number patterns
 */
export declare const NUMBER_PATTERNS: {
    DECIMAL: RegExp;
    AMOUNT: RegExp;
    PLAIN_AMOUNT: RegExp;
};
/**
 * Date patterns (multiple formats)
 */
export declare const DATE_PATTERNS: {
    ISO: RegExp;
    DMY: RegExp;
    MDY: RegExp;
    CHINESE: RegExp;
    SHORT: RegExp;
};
/**
 * Time patterns
 */
export declare const TIME_PATTERNS: {
    HOUR_24: RegExp;
    HOUR_12: RegExp;
    CHINESE: RegExp;
};
/**
 * Receipt number patterns
 */
export declare const RECEIPT_NUMBER_PATTERNS: {
    ALPHANUMERIC: RegExp;
    NUMERIC: RegExp;
    WITH_PREFIX: RegExp;
};
/**
 * Extract all matches for a pattern
 */
export declare function extractMatches(text: string, pattern: RegExp, confidence?: number): PatternMatch[];
/**
 * Normalize amount string to number
 */
export declare function normalizeAmount(amountStr: string): number;
/**
 * Normalize date to ISO format (YYYY-MM-DD)
 */
export declare function normalizeDate(dateStr: string): string | null;
/**
 * Normalize time to 24-hour format (HH:MM)
 */
export declare function normalizeTime(timeStr: string): string | null;
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