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const range = 2
export function generateCodeFrame(  source: string,  start = 0,  end = source.length): string {  // Split the content into individual lines but capture the newline sequence  // that separated each line. This is important because the actual sequence is  // needed to properly take into account the full line length for offset  // comparison  let lines = source.split(/(\r?\n)/)
  // Separate the lines and newline sequences into separate arrays for easier referencing  const newlineSequences = lines.filter((_, idx) => idx % 2 === 1)  lines = lines.filter((_, idx) => idx % 2 === 0)
  let count = 0  const res: string[] = []  for (let i = 0; i < lines.length; i++) {    count +=      lines[i].length +      ((newlineSequences[i] && newlineSequences[i].length) || 0)    if (count >= start) {      for (let j = i - range; j <= i + range || end > count; j++) {        if (j < 0 || j >= lines.length) continue        const line = j + 1        res.push(          `${line}${' '.repeat(Math.max(3 - String(line).length, 0))}|  ${            lines[j]          }`        )        const lineLength = lines[j].length        const newLineSeqLength =          (newlineSequences[j] && newlineSequences[j].length) || 0
        if (j === i) {          // push underline          const pad = start - (count - (lineLength + newLineSeqLength))          const length = Math.max(            1,            end > count ? lineLength - pad : end - start          )          res.push(`   |  ` + ' '.repeat(pad) + '^'.repeat(length))        } else if (j > i) {          if (end > count) {            const length = Math.max(Math.min(end - count, lineLength), 1)            res.push(`   |  ` + '^'.repeat(length))          }
          count += lineLength + newLineSeqLength        }      }      break    }  }  return res.join('\n')}