import type { Expression } from "../types.js";
import type { StringLiteralType, NumberLiteralType, BooleanLiteralType } from "../types/typeHints.js";
/** Convert a literal expression to its literal type, or null if not a simple
 *  literal. Single source of truth — `synthType`'s string-literal case also
 *  uses it, and the discriminant-narrowing recognizer uses the numeric/boolean
 *  cases. Note: `synthType` deliberately does NOT route its number/boolean
 *  cases here (those stay `NUMBER_T`/`BOOLEAN_T`); only the recognizer needs
 *  literal types for `number`/`boolean`. */
export declare function literalToType(e: Expression): StringLiteralType | NumberLiteralType | BooleanLiteralType | null;