matrix storage order can now also be row-dominant (choosable for each matrix separately)

map() moves from MatrixBase to Matrix
much more documentation/examples/snippets

1 files changed, 12 insertions, 0 deletions

diff --git a/doc/snippets/MatrixBase_eval.cpp b/doc/snippets/MatrixBase_eval.cpp
new file mode 100644
index 000000000..376957359
--- /dev/null
+++ b/doc/snippets/MatrixBase_eval.cpp
@@ -0,0 +1,12 @@
+Matrix2f M = Matrix2f::random();
+Matrix2f m;
+m = M;
+cout << "Here is the matrix m:" << endl << m << endl;
+cout << "Now we want to replace m by its own transpose." << endl;
+cout << "If we do m = m.transpose(), then m becomes:" << endl;
+m = m.transpose();
+cout << m << endl << "which is wrong!" << endl;
+cout << "Now let us instead do m = m.transpose().eval(). Then m becomes" << endl;
+m = M;
+m = m.transpose().eval();
+cout << m << endl << "which is right." << endl;