QR: add isInjective(), isSurjective(),
mark isFullRank() deprecated,
add solve() (mix of Keir's patch and LU::solve())
=> there is big problem with complex which are not working
diff --git a/doc/snippets/compile_snippet.cpp.in b/doc/snippets/compile_snippet.cpp.in
index 3eaee98..d074cac 100644
--- a/doc/snippets/compile_snippet.cpp.in
+++ b/doc/snippets/compile_snippet.cpp.in
@@ -1,6 +1,7 @@
#include <Eigen/Core>
#include <Eigen/Array>
#include <Eigen/LU>
+#include <Eigen/QR>
#include <Eigen/Cholesky>
#include <Eigen/Geometry>