/**
 * Creates a new filled Buffer instance.
 * alloc(size[, fill[, encoding]])
 */
Buffer.alloc = function alloc(size, fill, encoding) {
  validateNumber(size, 'size', 0, kMaxLength);
  if (fill !== undefined && fill !== 0 && size > 0) {
    const buf = createUnsafeBuffer(size);
    return _fill(buf, fill, 0, buf.length, encoding);
  }
  return new FastBuffer(size);
};

/**
 * Creates a new filled Buffer instance.
 * alloc(size[, fill[, encoding]])
 */
Buffer.alloc = function alloc(size, fill, encoding) {
  validateNumber(size, 'size', 0, kMaxLength);
  if (fill !== undefined && fill !== 0 && size > 0) {
    const buf = createUnsafeBuffer(size);
    return _fill(buf, fill, 0, buf.length, encoding);
  }
  return new FastBuffer(size);
};

class FastBuffer extends Uint8Array {
  // Using an explicit constructor here is necessary to avoid relying on
  // `Array.prototype[Symbol.iterator]`, which can be mutated by users.
  // eslint-disable-next-line no-useless-constructor
  constructor(bufferOrLength, byteOffset, length) {
    super(bufferOrLength, byteOffset, length);
  }
} 

class FastBuffer extends Uint8Array {
  // Using an explicit constructor here is necessary to avoid relying on
  // `Array.prototype[Symbol.iterator]`, which can be mutated by users.
  // eslint-disable-next-line no-useless-constructor
  constructor(bufferOrLength, byteOffset, length) {
    super(bufferOrLength, byteOffset, length);
  }
}