doc/examples/make_circulant.cpp.entry - external/gitlab.com/libeigen/eigen - Git at Google

 template <class ArgType>
 Circulant<ArgType> makeCirculant(const Eigen::MatrixBase<ArgType>& arg)
 {
   return Circulant<ArgType>(arg.derived());
 }
	template <class ArgType>
	Circulant<ArgType> makeCirculant(const Eigen::MatrixBase<ArgType>& arg)
	{
	return Circulant<ArgType>(arg.derived());
	}