Struct dimensionless

Struct dimensionless_type

boost::units::dimensionless_type — Dimension lists in which all exponents resolve to zero reduce to dimensionless_type.
boost::units::dimensionless_type — 所有指數都為0的量綱序列會被歸約為dimensionless_type

Synopsis

struct dimensionless_type {
  // types
  typedef dimensionless_type type;
  typedef unspecified        tag; 
  typedef mpl::long_< 0 >    size;
};