//#region packages/common/src/utils/swc-span.d.ts
/**
 * SWC span position converter: UTF-8 byte offsets → UTF-16 code unit indices.
 *
 * SWC (Rust-based) returns span positions as UTF-8 byte offsets.
 * JavaScript strings use UTF-16 code units for indexing.
 * For ASCII-only content these are identical, but for multi-byte
 * characters the positions diverge.
 */
type SwcSpanConverter = {
  /** UTF-8 byte length of the source string */
  readonly byteLength: number;
  /** Convert a UTF-8 byte offset (within the source) to a UTF-16 code unit index */
  readonly byteOffsetToCharIndex: (byteOffset: number) => number;
};
/**
 * Create a converter that maps UTF-8 byte offsets to UTF-16 char indices
 * for the given source string.
 *
 * Includes a fast path for ASCII-only sources (zero allocation).
 */
declare const createSwcSpanConverter: (source: string) => SwcSpanConverter;
//#endregion
export { createSwcSpanConverter as n, SwcSpanConverter as t };
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