import type { SkipPattern } from './skipPattern.js';
export type NoMutationsDiagnosis = {
    reason: 'line-range';
    coveredCount: number;
} | {
    reason: 'skip-patterns';
    inRangeCount: number;
} | {
    reason: 'mutator-filter';
    eligibleCount: number;
} | {
    reason: 'no-mutable-pattern';
    eligibleCount: number;
};
export interface NoMutationsInputs {
    coveredLines: Set<number>;
    allowedLines: Set<number> | undefined;
    skipPatterns: SkipPattern[];
    sourceLines: string[];
    mutatorFilterActive: boolean;
}
export declare const diagnoseNoMutations: ({ coveredLines, allowedLines, skipPatterns, sourceLines, mutatorFilterActive, }: NoMutationsInputs) => NoMutationsDiagnosis;