Method FormatSpecification

base/string/format/specification.h:25–30

    char specifier;     // c, d, x, o, i, s, p...

    FormatSpecification() :
        width(-1),
        length(0),
        specifier('\0')
    {
    }

    bool has_width() const { return width != -1; }
    bool has_length() const { return length != 0; }