/**
 * Extract `<sequence>` declarations from an `<env>` element's content.
 *
 * Each `<sequence>` tag produces one of these specs depending on how its
 * `<gen>` children are written:
 *
 *   - Exactly one anonymous `<gen>` child → simple sequence (`gen`).
 *   - Two or more named `<gen name="…">` children → compound sequence
 *     (`gens`). Field order is preserved.
 *   - Any `<gen if="…">` children → conditional sequence (`conditional`).
 *
 * A standalone env-level `<mix name="…">` tag (sibling of `<sequence>`)
 * produces a mix sequence (`mixSpec`) — its `<case>` branches are
 * distributed across the rows by `percent`.
 *
 * Structural validation (missing name, missing gen, mixed named/unnamed,
 * duplicate field names, …) is delegated to the validator — this
 * extractor is lenient and produces a best-effort spec so the render
 * path can assume a well-formed tree.
 */
import type { OpenCloseElementContext } from '../generated/TDCParser.js';
import type { AssertSpec } from './assert.js';
import type { SequenceSpec } from './types.js';
export declare function extractSequenceSpecs(env: OpenCloseElementContext | undefined): SequenceSpec[];
/**
 * Env-level `<distinct>` groups — the wrapped sequences must produce different
 * values from each other per row (e.g. birth-city ≠ live-city). Sequence
 * granularity; the field-granularity `<distinct>` inside one sequence is
 * handled by `collectSequenceGens`.
 */
export declare function extractEnvDistinctGroups(env: OpenCloseElementContext | undefined): string[][];
/**
 * Env-level `<uniq>` groups — the TUPLE of the wrapped sequences must be unique
 * across all rows (e.g. every (First, Last) pair distinct). The across-rows
 * twin of env-level `<distinct>`.
 */
export declare function extractEnvUniqGroups(env: OpenCloseElementContext | undefined): string[][];
/**
 * Env-level `<assert that="…"/>` and `<assert each="…"/>`, in document order.
 *
 * A sibling of `<uniq>` and `<distinct>` because, like them, it states something
 * the run as a whole must satisfy. Self-closing, so the generic
 * `selfClosingElement` rule already parses it and no grammar changed.
 */
export declare function extractAsserts(env: OpenCloseElementContext | undefined): AssertSpec[];
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