/**
 * The ARGUMENT of an interpolation filter — the part after the colon.
 *
 * The filter NAME has been checked since TDC192, and a mask pattern since
 * TDC199/TDC256. The argument of every other filter reached the renderer
 * unread, and the renderer is lenient by design: `applyGroup` returns the value
 * untouched when the size is not a usable number, `applyCompact` when the base
 * is outside 2..36. That leniency is right at render time — one bad row must not
 * abort a million-row run — but it means the config says one thing and the
 * output does another, with nothing said anywhere. Measured, all five accepted:
 *
 *     ${{N|group:abc}}    the digits come out ungrouped
 *     ${{N|group:0}}      the same
 *     ${{N|compact:1}}    base below 2 — the number comes out unchanged
 *     ${{N|compact:99}}   base above 36 — the same
 *     ${{N|slice:abc}}    the whole value, unsliced
 *     ${{N|slice:5,2}}    the column comes out EMPTY
 *     ${{N|trim:junk}}    the argument is read by nothing
 *
 * The last two are the ones that cost real time: an empty column looks like a
 * generator that failed, and an ignored argument looks like a filter that does
 * not work.
 *
 * What is NOT refused, deliberately:
 *
 * - `group` and `compact` with no argument at all — both have a documented
 *   default (3, and base 36).
 * - `csv:;` — the delimiter is accepted and ignored on purpose; the filter
 *   quotes unconditionally, and the argument documents intent at the call site.
 * - a negative `slice` index — `slice:-3` is the last three characters, and
 *   `slice:-3,-1` is a legitimate range. Only a from/to pair of the SAME sign
 *   can be proven empty; with mixed signs the answer depends on the value's
 *   length, and a refusal has to be a proof.
 */
import type { Diagnostic } from '../errors/index.js';
import type { DataElementContext } from '../generated/TDCParser.js';
/**
 * Check one `kind:arg` pair from a `${{X|filter:arg}}` reference.
 *
 * `mask` is not handled here — it has its own two checks beside this one.
 */
export declare function checkFilterArg(kind: string, arg: string | undefined, node: DataElementContext, diagnostics: Diagnostic[]): void;
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