import type { SliceTypeSteps } from '../slice';
import type { CharPredicate } from './types';
export declare const isLetter: CharPredicate<string>;
export declare const isWhitespace: CharPredicate<string>;
export declare const isPunctuation: CharPredicate<string>;
/**
 * Compares two block slice types, ignores tag discriminants.
 */
export declare const stepsEqual: (a: SliceTypeSteps, b: SliceTypeSteps) => boolean;