import type { InputStream } from '@lezer/lr';
/**
 * Scans an identifier-like run from the current position, returning the matched character count
 * (`0` if none). A leading `$` defers to the grammar's `Variable` token. `allowComma` treats
 * comma as a plain character instead of a terminator.
 * `stopAtJsonPathBoundary` stops at a non-leading `$.` or `$[` so `JsonPathBase` can take over
 * (used for filter keys).
 * @internal
 */
export declare function scanIdentifier(inputStream: InputStream, { allowComma, stopAtJsonPathBoundary, }: {
    allowComma: boolean;
    stopAtJsonPathBoundary: boolean;
}): number;
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