/**
 * Walking a container's body and naming what does not belong in it.
 *
 * Three containers used to accept an invented tag without a word — the body of
 * `<gen>`, a `<distinct>`/`<uniq>` wrapper, and (elsewhere) `<pool>` and the
 * fixtures. The walk is the same each time and only the allowed list differs,
 * so it lives here once rather than four times in `validate.ts`.
 *
 * `<data>` is never walked. A tag inside it is output TEXT —
 * `<data>x<b/>y</data>` renders `x<b/>y` — which is how a config emits XML or
 * HTML, and refusing it would take that away to catch a typo.
 */
import type { Diagnostic } from '../errors/index.js';
import type { OpenCloseElementContext, SelfClosingElementContext } from '../generated/TDCParser.js';
import { elementKind } from '../processor/walk.js';
/** Report every child of `el` that is not on `allowed`. */
export declare function checkContainedTags(el: OpenCloseElementContext, parent: string, allowed: readonly string[], sink: {
    diagnostics: Diagnostic[];
}): void;
/**
 * The open/close form of `<gen>` has a body, and everything but `<data>` in it
 * was ignored. The self-closing form has none, so it is nothing to check.
 */
export declare function checkGenBody(gen: OpenCloseElementContext | SelfClosingElementContext, sink: {
    diagnostics: Diagnostic[];
}): void;
/**
 * A `<distinct>`/`<uniq>` wrapper's own body, whichever level it sits at — the
 * caller supplies the list, because the two levels hold different things: the
 * FIELDS of one record inside a `<sequence>`, whole COLUMNS at `<env>` level.
 */
export declare function checkGroupBody(el: {
    readonly node: OpenCloseElementContext;
} | undefined, tag: string, allowed: readonly string[], sink: {
    diagnostics: Diagnostic[];
}): void;
/** The open/close node of a child element, or undefined for anything else. */
export declare function openChild(child: Parameters<typeof elementKind>[0]): {
    readonly node: OpenCloseElementContext;
} | undefined;
/**
 * A second `<env>` or a second `<block>` under `<tdc>`.
 *
 * Both are read by taking the FIRST of their kind, so a second one is dropped
 * whole — every sequence it declares, every line it lays out — and the run
 * finishes looking healthy. `check` called such a document valid, and half the
 * config produced nothing: the same silent discard TDC014 refuses for the
 * self-closing spelling, one level up.
 *
 * Reported on the SECOND one: the first is the one that runs, so the second is
 * the surprise, and pointing at it puts the caret on the text to delete or
 * merge.
 */
export declare function checkOneEnvOneBlock(tdc: OpenCloseElementContext, diagnostics: Diagnostic[]): void;
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