export interface FastPathStructure {
    delimiter: string;
    hasQuotes: boolean;
    hasEscapedQuotes: boolean;
    hasBackslashes?: boolean;
    hasNewlinesInFields: boolean;
    recommendedEngine: 'SIMPLE' | 'QUOTE_AWARE' | 'STANDARD';
    maxFields: number;
    fieldConsistency: boolean;
    avgFieldsPerLine?: number;
}
declare class FastPathEngine {
    compilers: Map<any, any>;
    rowCompilers: Map<any, any>;
    stats: {
        simpleParserCount: number;
        quoteAwareParserCount: number;
        standardParserCount: number;
        cacheHits: number;
        cacheMisses: number;
    };
    constructor();
    _hasQuotes(csv: string): boolean;
    _hasEscapedQuotes(csv: string): boolean;
    _hasBackslashes(csv: string): boolean;
    _getStructureForParse(csv: any, options: any): {
        hasQuotes: boolean;
        hasEscapedQuotes: boolean;
        hasBackslashes: boolean;
        delimiter: string;
        hasNewlinesInFields: boolean;
        recommendedEngine: "SIMPLE" | "QUOTE_AWARE" | "STANDARD";
        maxFields: number;
        fieldConsistency: boolean;
        avgFieldsPerLine?: number;
    };
    analyzeStructure(sample: string, options?: {
        delimiter?: string;
    }): FastPathStructure;
    _detectDelimiter(sample: string): string;
    _selectEngine(hasQuotes: boolean, hasNewlinesInFields: boolean, _fieldConsistency: boolean): FastPathStructure['recommendedEngine'];
    _createSimpleParser(structure: FastPathStructure): (_csv: string) => string[][];
    _emitSimpleRows(csv: any, delimiter: any, onRow: any): void;
    _emitSimpleRowsEscaped(csv: any, delimiter: any, onRow: any): void;
    _simpleRowsGenerator(csv: any, delimiter: any): Generator<any[], void, unknown>;
    _simpleEscapedRowsGenerator(csv: any, delimiter: any): Generator<any[], void, unknown>;
    _createSimpleRowEmitter(structure: FastPathStructure): (_csv: string, _onRow: (_row: string[]) => void) => void;
    _createQuoteAwareParser(structure: FastPathStructure): (_csv: string) => string[][];
    _createQuoteAwareRowEmitter(structure: FastPathStructure): (_csv: string, _onRow: (_row: string[]) => void) => void;
    _quoteAwareRowsGenerator(csv: any, delimiter: any, hasEscapedQuotes: any): Generator<any[], void, unknown>;
    _quoteAwareEscapedRowsGenerator(csv: any, delimiter: any, hasEscapedQuotes: any): Generator<any[], void, unknown>;
    compileParser(structure: FastPathStructure): (_csv: string) => string[][];
    compileRowEmitter(structure: FastPathStructure): (_csv: string, _onRow: (_row: string[]) => void) => void;
    iterateRows(csv: any, options?: {}): Generator<any[], void, unknown>;
    parse(csv: any, options?: {}): string[][];
    parseRows(csv: any, options: {}, onRow: any): void;
    getStats(): {
        totalParsers: number;
        hitRate: number;
        simpleParserCount: number;
        quoteAwareParserCount: number;
        standardParserCount: number;
        cacheHits: number;
        cacheMisses: number;
    };
    reset(): void;
}
export default FastPathEngine;