/**
 * A character's Arabic joining class (ArabicShaping.txt): Right-, Left-,
 * Dual-joining, join-Causing, Non-joining, or Transparent (combining marks).
 */
export type JoiningType = 'R' | 'L' | 'D' | 'C' | 'U' | 'T';
/** The contextual cursive form a letter takes: isolated, initial, medial or final. */
export type ArabicForm = 'isol' | 'init' | 'medi' | 'fina';
/**
 * Classify a code point's Arabic {@link JoiningType}. Covers the standard Arabic
 * block plus tatweel and the ZWJ/ZWNJ controls; everything else is non-joining.
 *
 * @param cp The Unicode code point.
 * @returns Its joining type.
 */
export declare function arabicJoiningType(cp: number): JoiningType;
/**
 * Assign a cursive {@link ArabicForm} to each code point in a run, from the
 * joining types of the surrounding letters (transparent marks are skipped).
 * Non-joining characters get `'isol'` — a harmless default, since their glyph is
 * never in the positional maps.
 *
 * @param cps The run's code points, in logical order.
 * @returns The per-code-point form, parallel to `cps`.
 */
export declare function assignArabicForms(cps: ReadonlyArray<number>): Array<ArabicForm>;