Function applyCurlySingleQuotes

src/tools/FileEditTool/utils.ts:173–199

(str: string)

}

function applyCurlySingleQuotes(str: string): string {
  const chars = [...str]
  const result: string[] = []
  for (let i = 0; i < chars.length; i++) {
    if (chars[i] === "'") {
      // Don't convert apostrophes in contractions (e.g., "don't", "it's")
      // An apostrophe between two letters is a contraction, not a quote
      const prev = i > 0 ? chars[i - 1] : undefined
      const next = i < chars.length - 1 ? chars[i + 1] : undefined
      const prevIsLetter = prev !== undefined && /\p{L}/u.test(prev)
      const nextIsLetter = next !== undefined && /\p{L}/u.test(next)
      if (prevIsLetter && nextIsLetter) {
        // Apostrophe in a contraction — use right single curly quote
        result.push(RIGHT_SINGLE_CURLY_QUOTE)
      } else {
        result.push(
          isOpeningContext(chars, i)
            ? LEFT_SINGLE_CURLY_QUOTE
            : RIGHT_SINGLE_CURLY_QUOTE,
        )
      }
    } else {
      result.push(chars[i]!)
    }
  }
  return result.join('')
}

/**
 * Transform edits to ensure replace_all always has a boolean value