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Minimal test - lines (24, 34)

Code

  NS_DECL_ISUPPORTS
  NS_DECL_NSIGZFILEWRITER

  /**
   * nsIGZFileWriter exposes two non-virtual overloads of Write().  We
   * duplicate them here so that you can call these overloads on a pointer
   * to the concrete nsGZFileWriter class.
   */
  [[nodiscard]] nsresult Write(const char* aStr) {
    return nsIGZFileWriter::Write(aStr);
  }

Minimal test - lines (16, 45)

Code

class nsGZFileWriter final : public nsIGZFileWriter {
  virtual ~nsGZFileWriter();

 public:
  enum Operation { Append, Create };

  explicit nsGZFileWriter(Operation aMode = Create);

  NS_DECL_ISUPPORTS
  NS_DECL_NSIGZFILEWRITER

  /**
   * nsIGZFileWriter exposes two non-virtual overloads of Write().  We
   * duplicate them here so that you can call these overloads on a pointer
   * to the concrete nsGZFileWriter class.
   */
  [[nodiscard]] nsresult Write(const char* aStr) {
    return nsIGZFileWriter::Write(aStr);
  }

  [[nodiscard]] nsresult Write(const char* aStr, uint32_t aLen) {
    return nsIGZFileWriter::Write(aStr, aLen);
  }

 private:
  Operation mMode;
  bool mInitialized;
  bool mFinished;
  gzFile mGZFile;
};