/**
 * LCOV (.info) coverage parser — Spec 15 R4.
 *
 * Parses LCOV tracefiles produced by Istanbul/nyc, c8, and similar tools.
 * Extracts per-file, per-line, and per-function coverage data.
 *
 * Format reference: https://ltp.sourceforge.net/coverage/lcov/geninfo.1.php
 */
export interface LcovEntry {
    /** Source file path (SF:) */
    sourceFile: string;
    /** Array of [lineNumber, executionCount] tuples (DA:) */
    lines: Array<[number, number]>;
    /** Map of function name → [line, hitCount] (FN: + FNDA:) */
    functions: Map<string, {
        line: number;
        hitCount: number;
    }>;
    /** Lines found (LF:) */
    linesFound: number;
    /** Lines hit (LH:) */
    linesHit: number;
    /** Test name (TN:) */
    testName?: string;
}
/**
 * Parse an LCOV .info file string into structured entries.
 * One entry per `end_of_record` delimited record.
 */
export declare function parseLcov(content: string): LcovEntry[];
/**
 * Convert LCOV entries to a flat coverage map:
 * sourceFile → Set of covered line numbers.
 */
export declare function lcovToLineCoverage(entries: LcovEntry[]): Map<string, Set<number>>;
/**
 * Convert LCOV entries to a flat set of covered function names per file.
 */
export declare function lcovToFunctionCoverage(entries: LcovEntry[]): Map<string, Set<string>>;
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