点积是犰狳的乘法

我有一个行向量和一个列向量，我想求它们的点积

rowvec v = {1,2,3,4};
vec w = {5,6,7,8};
double a = dot(v,w) // works
double b = v*w // doesn't work
double c = (v*w)(0) // doesn't work
double d = static_cast<vec>(v*w)(0) //works

有可能得到看起来像b的东西吗?我希望它更容易读。