import type { Open } from "./lexical-context.ts";
import type { ReadLineRange } from "./types.ts";
/** A lexical proof only: ambiguous headers invalidate the whole parse, not just one fold. */
export declare class HeaderProtection {
    readonly intervals: ReadLineRange[];
    private pending;
    private target;
    private parameters;
    get active(): boolean;
    get unfinished(): boolean;
    word(word: string, previous: string, depth: number, line: number, typescript: boolean): boolean;
    open(char: string, depth: number, previous: string, line: number): boolean;
    close(open: Open, depth: number, line: number): void;
    punctuation(token: string, depth: number, line: number): boolean;
    protect(startLine: number, endLine: number): void;
    filter(ranges: readonly ReadLineRange[]): ReadLineRange[];
}
//# sourceMappingURL=header-protection.d.ts.map