  FormatSpec(
    unsigned width = 0, char type = 0, wchar_t fill = ' ')
  : AlignSpec(width, fill), flags_(0), precision_(-1), type_(type) {}
  FormatSpec(
    unsigned width = 0, char type = 0, wchar_t fill = ' ')
  : AlignSpec(width, fill), flags_(0), precision_(-1), type_(type) {}