/**
 * Validation for `<gen type="running">` — a total that carries down a column.
 *
 * Two things have to hold before the engine ever sees it, and neither is
 * discoverable from the row it stands on:
 *
 *   - it has to say WHAT to accumulate (`of=`) and HOW (`accumulate=`);
 *   - the column it reads has to be declared ABOVE it, because the total is
 *     built in declaration order out of a column that already exists.
 *
 * The second is the same rule `parent=` follows, and for the same reason.
 */
import type { Diagnostic } from '../errors/index.js';
import type { OpenCloseElementContext, SelfClosingElementContext } from '../generated/TDCParser.js';
/** Every attribute a running total cannot do without. */
export declare function checkGenRunning(gen: OpenCloseElementContext | SelfClosingElementContext, declaredAbove: readonly string[], diagnostics: Diagnostic[]): void;
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