* 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.

test/product.cpp

@@ -83,6 +83,9 @@ template<typename MatrixType> void product(const MatrixType& m)
   VERIFY_IS_APPROX(v1,                      identity*v1);
   // again, test operator() to check const-qualification
   VERIFY_IS_APPROX(MatrixType::identity(rows, cols)(r,c), static_cast<Scalar>(r==c));
+
+  if (rows!=cols)
+    VERIFY_RAISES_ASSERT(m3 = m1*m1);
 }
 
 void EigenTest::testProduct()