import { type CssTriviaVisitor } from './trivia-css-scanner.ts';
import type { LabeledTriviaSpec } from './trivia-kinds.ts';
export type TriviaArmMatcher = (input: string, pos: number) => number;
/** A direct classified scanner for the four canonical CSS/Less trivia tuples. */
export declare function commonLabeledTriviaVisitor(spec: LabeledTriviaSpec): CssTriviaVisitor | null;
/**
 * The character-level matchers for a spec's arms — index-parallel to `spec.arms`,
 * so a matcher's index IS its kind index — or `null` when any arm has no lowering.
 *
 * `spec.minRepeats > 1` is excluded: the loops below report only an END, and a run
 * that fails a minimum of two must report NOTHING. `classifiedTrivia()` never
 * produces one, and the combinator path still handles it if a host writes one.
 */
export declare function charArmsFor(spec: LabeledTriviaSpec): readonly TriviaArmMatcher[] | null;
/** End of the trivia run at `cur`, or `cur` when nothing matched. */
export declare function charTriviaEnd(input: string, cur: number, arms: readonly TriviaArmMatcher[]): number;
/** As `charTriviaEnd`, reporting each chunk with the kind index that matched it. */
export declare function charTriviaVisit(input: string, cur: number, arms: readonly TriviaArmMatcher[], visit: (start: number, end: number, kindIndex: number) => void): number;
/** The `1 << kindIndex` mask of the categories in the run at `cur`. */
export declare function charTriviaKindMask(input: string, cur: number, arms: readonly TriviaArmMatcher[]): number;
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