Function readBalanced

scripts/experimental/swiftui-preview.mjs:1053–1080

(source, start, open, close)

}

function readBalanced(source, start, open, close) {
  let depth = 0;
  let textStart = start + 1;
  for (let index = start; index < source.length; index += 1) {
    const char = source[index];
    if (char === '"' || char === "'") {
      index = skipQuoted(source, index);
      continue;
    }
    if (char === "/" && source[index + 1] === "/") {
      index = skipLineComment(source, index);
      continue;
    }
    if (char === "/" && source[index + 1] === "*") {
      index = skipBlockComment(source, index);
      continue;
    }
    if (char === open) {
      depth += 1;
    } else if (char === close) {
      depth -= 1;
      if (depth === 0) {
        return { end: index, text: source.slice(textStart, index) };
      }
    }
  }
  throw new Error(`Unbalanced ${open}${close} block near offset ${start}.`);
}

function firstStringLiteral(text) {
  const match = text.match(/"((?:\\"|[^"])*)"/);