/**
 * Round-trip validation for the schema transform.
 *
 * After the transform deparses its mutated AST to SQL text, the emitted text
 * must parse back to an AST that is structurally identical to the AST we
 * deparsed (AST1 === AST2 after normalization). Any mismatch means the
 * deparser dropped or mangled something (e.g. array bounds on a DECLAREd
 * type), even though the output may still be syntactically valid SQL.
 *
 * Two comparisons are performed per file:
 * - the SQL-level parse tree (with volatile fields and function body strings
 *   normalized — PL/pgSQL bodies are compared separately)
 * - each PL/pgSQL function body, compared in dehydrated form so both sides
 *   go through the same hydrate -> dehydrate rendering
 */
import { firstDifference } from './round-trip-core';
export { firstDifference };
/**
 * Fortified, mutation-aware normalizer built on the shared round-trip core.
 * Beyond the upstream `cleanTree` (position stripping + body trimming), it
 * additionally sorts keys, drops lazily-created recfield datums, and replaces
 * DefElem "as" bodies with a sentinel (PL/pgSQL body fidelity is checked
 * separately via the dehydrated PL/pgSQL ASTs).
 */
export declare function normalizeParseTree(node: any): any;
export interface CapturedAsts {
    sqlAst: any;
    plpgsqlAsts: any[];
}
/**
 * Capture the normalized SQL parse tree and dehydrated PL/pgSQL function
 * ASTs from a transform context (as produced by plpgsql-parser's
 * transformSync callback). Call this AFTER mutating the context.
 */
export declare function captureTransformAsts(ctx: any): CapturedAsts;
/**
 * Parse already-transformed SQL text and capture its ASTs the same way
 * capture_transform_asts does for the pre-deparse context, so the two
 * sides are directly comparable.
 */
export declare function captureAstsFromSql(sql: string): CapturedAsts;
/**
 * Assert that the transformed AST (captured before deparse) matches the AST
 * obtained by re-parsing the emitted SQL. Throws with the first differing
 * path on mismatch.
 */
export declare function validateRoundTrip(before: CapturedAsts, transformedSql: string): void;