* Added support for a comma initializer: mat.block(i,j,2,2) << 1, 2, 3, 4;

If the number of coefficients does not match the matrix size, then an assertion is raised.
  No support for xpr on the right side for the moment.

* Added support for assertion checking. This allows to test that an assertion is indeed raised
  when it should be.

* Fixed a mistake in the CwiseUnary example.

Eigen/Core

@@ -1,7 +1,9 @@
 #include <cstdlib>
 #include <cmath>
 #include <complex>
+#ifndef EIGEN_CUSTOM_ASSERT
 #include <cassert>
+#endif
 #include <iostream>
 
 namespace Eigen {
@@ -37,6 +39,7 @@ namespace Eigen {
 #include "src/Core/Map.h"
 #include "src/Core/IO.h"
 #include "src/Core/Swap.h"
+#include "src/Core/CommaInitializer.h"
 
 } // namespace Eigen