import { type FnRule } from "../infer/functions.js";
import { type Type } from "../infer/types.js";
import type { Expr } from "../ir/ir.js";
export declare const TSQL_FUNCTION_RETURNS: Record<string, FnRule>;
/** T-SQL pre-registry inference hook — the XML data type methods, which `lowerUdtElem` lowers to
 *  `function` nodes with the receiver as arg 0. `value(xpath, 'sqltype')` is typed by its literal
 *  sqltype argument (never-wrong: no XML shredding — the declared sqltype is the value's runtime
 *  type; a non-literal sqltype falls through to unknown); `exist()` → boolean (bit); `query()` → xml.
 *  https://learn.microsoft.com/en-us/sql/t-sql/xml/xml-data-type-methods */
export declare function tsqlSpecial(fn: Extract<Expr, {
    kind: "function";
}>): Type | undefined;
/** T-SQL literal forms: `'str'` / `N'unicode'` → string, `0x…` → binary, `1` → int, `1.5` → decimal
 *  (numeric), `1e3` → float. */
export declare function tsqlLiteral(text: string): Type;
export declare function tsqlParseType(text: string): Type;