/**
 * ICU MessageFormat support for the i18n module.
 *
 * Implements the subset of ICU MessageFormat that bQuery commits to as a
 * documented, stable contract:
 *
 * - **Simple arguments** — `{name}`
 * - **`plural`** — cardinal plurals via `Intl.PluralRules`, with `offset:N`,
 *   exact `=N` selectors, and the `#` token (locale-formatted `value - offset`)
 * - **`selectordinal`** — ordinal plurals via `Intl.PluralRules` (`{ type: 'ordinal' }`)
 * - **`select`** — keyed string selection (e.g. grammatical gender)
 * - **Nested arguments** — sub-messages may contain further arguments and `#`
 * - **Apostrophe escaping** — `'{'`, `'}'`, `'#'` literals and `''` for a literal apostrophe
 *
 * Inline `number`/`date`/`time` argument types (skeletons) are intentionally
 * **not** supported — use the instance `n()` / `d()` helpers instead. See the
 * i18n guide for the full coverage statement and its known limitations.
 *
 * @module bquery/i18n
 * @internal
 */
import type { TranslateParams } from './types';
/**
 * Detects whether a template uses ICU MessageFormat typed arguments
 * (`plural`, `selectordinal`, or `select`). Plain `{name}` interpolation and
 * pipe-delimited plurals are deliberately excluded so the legacy fast path
 * stays untouched.
 *
 * @internal
 */
export declare const isICUMessage: (template: string) => boolean;
/**
 * Formats an ICU MessageFormat string. Parsed ASTs are cached by template so
 * repeated translations of the same key avoid re-parsing.
 *
 * @internal
 */
export declare const formatICU: (template: string, params: TranslateParams, locale: string) => string;
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