/**
 * Everything checked on one `<data>` in a `<block>`.
 *
 * Lives apart from `validate.ts` because that file is at its 1000-line ceiling,
 * and because this is a coherent unit on its own: the interpolation filters, the
 * typed-column declaration, and the row condition are the three things a `<data>`
 * can get wrong.
 */
import type { Diagnostic } from '../errors/index.js';
import type { AttrContext, DataElementContext } from '../generated/TDCParser.js';
/**
 * What this needs from the validator's context — declared structurally so the
 * check does not have to import the Ctx class and create a cycle.
 */
export interface DataCheckSink {
    readonly diagnostics: Diagnostic[];
    readonly inject: string;
    rememberExpression(attr: AttrContext, expr: string, eachBuiltins?: readonly string[]): void;
}
/**
 * Flag unknown filters in `${{ name | filter | … }}`. Only runs for the default
 * `${{%}}` inject (custom delimiters are left unchecked, and any `${{…|…}}` under
 * the default IS a real interpolation, so there are no false positives).
 */
export declare function checkData(data: DataElementContext, ctx: DataCheckSink, eachBuiltins?: readonly string[]): void;
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