float_info_base implements all virtual functions defined in
type_info_interface. Note, only additional methods not defined
in the interface class are listed in the following table.
|float_info_base(const double le,
const double ri,
const double lo,
const double hi)
|Constructor of the class. ``le'', ``ri'', ``lo'', and ``hi'' are the left, right, low respectively high bounds of the floating point type.|