/**
 * A `<uniq>` or `<distinct>` group that wraps fewer than two sequences.
 *
 * Such a group used to be dropped in silence: `check` said the config was
 * valid, the run succeeded, and the constraint the author asked for was simply
 * not there. Measured on the reference before this check existed — five rows
 * drawn from three values inside a one-member `<uniq>` came out `2 2 2 2 3`.
 *
 * It is a warning, not an error, because the config still runs and still means
 * something; what it does not do is what the author wrote it for.
 */
import type { Diagnostic } from '../errors/index.js';
import type { OpenCloseElementContext } from '../generated/TDCParser.js';
/**
 * Count the `<sequence>` members and warn if there are not enough to compare.
 *
 * `<sequence>`, `<mix>` and `<switch>` all count — every one of them is a
 * member the group can rearrange, a switch only within rows that share its
 * subject.
 */
export declare function checkGroupSize(wrapper: OpenCloseElementContext, diagnostics: Diagnostic[], tag: string): void;
export declare function checkGroupDerivedMember(wrapper: OpenCloseElementContext, diagnostics: Diagnostic[], tag: string): void;
/**
 * A group whose members draw from a `<pool>`.
 *
 * The group's promise is kept by member IDENTITY here — no two of them hand one
 * row the same member of the pool — because a record has no value of its own to
 * compare. That works, and these are the three shapes it cannot mean:
 *
 *   - a reference beside an ordinary sequence: one holds a record and the other
 *     a string, and there is no field the comparison would be about;
 *   - references to two DIFFERENT pools: a doctor is never the same record as a
 *     ward, so the group would be satisfied without doing anything;
 *   - more references than the pool has members: no arrangement exists.
 *
 * All three used to be accepted and then do nothing at all — the config asked
 * for a constraint, the engine agreed, and the constraint was not there.
 */
export declare function checkGroupPoolMembers(wrapper: OpenCloseElementContext, diagnostics: Diagnostic[], tag: string, poolCounts: ReadonlyMap<string, number>): void;
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