function readUntilDifferent()

in packages/selector/src/text/describe-text-quote.ts [246:271]

• 23 lines of code
• 9 McCabe index (conditional complexity)

function readUntilDifferent(
  seeker1: RelativeSeeker,
  seeker2: RelativeSeeker,
  reverse: boolean,
): string | undefined {
  let result = '';
  while (true) {
    let nextCharacter: string;
    try {
      nextCharacter = seeker1.read(reverse ? -1 : 1);
    } catch (err) {
      return undefined; // Start/end of text reached: cannot expand result.
    }
    result = reverse ? nextCharacter + result : result + nextCharacter;

    // Check if the newly added character makes the result differ from the second seeker.
    let comparisonCharacter: string | undefined;
    try {
      comparisonCharacter = seeker2.read(reverse ? -1 : 1);
    } catch (err) {
      // A RangeError would merely mean seeker2 is exhausted.
      if (!(err instanceof RangeError)) throw err;
    }
    if (nextCharacter !== comparisonCharacter) return result;
  }
}