import { Token } from './types';
/**
 * Forgiving tokenizer for LogQL.
 *
 * - Recognises `${name}` as `Variable`; a stray `$` becomes `Dollar` so the
 *   completion provider can surface variables before the user finishes typing.
 * - Tracks bracket nesting so a `|` inside `(...)`, `[...]`, `"..."` or `${...}`
 *   does NOT become a top-level pipe; this lets us split search / analyze segments
 *   reliably.
 * - Never throws: invalid characters yield `Error` tokens.
 */
export declare function tokenize(input: string): Token[];
/** Convenience: tokens without whitespace; preserves original `start/end`. */
export declare function nonWhitespace(tokens: Token[]): Token[];