Function test_ref_overload_fun1

dependence/eigen-3.4.0/test/ref.cpp:293–293

typedef Matrix<double,Dynamic,Dynamic,RowMajor> RowMatrixXd;
int test_ref_overload_fun1(Ref<MatrixXd> )       { return 1; }
int test_ref_overload_fun1(Ref<RowMatrixXd> )    { return 2; }
int test_ref_overload_fun1(Ref<MatrixXf> )       { return 3; }