Finish doc page on aliasing.

3 files changed, 18 insertions, 0 deletions

diff --git a/doc/snippets/TopicAliasing_mult1.cpp b/doc/snippets/TopicAliasing_mult1.cpp
new file mode 100644
index 000000000..cd7e9004c
--- /dev/null
+++ b/doc/snippets/TopicAliasing_mult1.cpp
@@ -0,0 +1,4 @@
+MatrixXf matA(2,2); 
+matA << 2, 0,  0, 2;
+matA = matA * matA;
+cout << matA;
diff --git a/doc/snippets/TopicAliasing_mult2.cpp b/doc/snippets/TopicAliasing_mult2.cpp
new file mode 100644
index 000000000..a3ff56851
--- /dev/null
+++ b/doc/snippets/TopicAliasing_mult2.cpp
@@ -0,0 +1,10 @@
+MatrixXf matA(2,2), matB(2,2); 
+matA << 2, 0,  0, 2;
+
+// Simple but not quite as efficient
+matB = matA * matA;
+cout << matB << endl << endl;
+
+// More complicated but also more efficient
+matB.noalias() = matA * matA;
+cout << matB;
diff --git a/doc/snippets/TopicAliasing_mult3.cpp b/doc/snippets/TopicAliasing_mult3.cpp
new file mode 100644
index 000000000..1d12a6c67
--- /dev/null
+++ b/doc/snippets/TopicAliasing_mult3.cpp
@@ -0,0 +1,4 @@
+MatrixXf matA(2,2); 
+matA << 2, 0,  0, 2;
+matA.noalias() = matA * matA;
+cout << matA;