if constexpr()

in code/include/swoc/Scalar.h [62:68]


  if constexpr (N == S) {
    return c;
  } else if constexpr (R::den == 1) {
    return c / R::num; // N = k S
  } else if constexpr (R::num == 1) {
    return c * R::den; // S = k N
  }