bug #903: clean swap API regarding extra enable_if parameters, and add failtests for swap

1 files changed, 14 insertions, 0 deletions

diff --git a/failtest/swap_1.cpp b/failtest/swap_1.cpp
new file mode 100644
index 000000000..106379720
--- /dev/null
+++ b/failtest/swap_1.cpp
@@ -0,0 +1,14 @@
+#include "../Eigen/Core"
+
+using namespace Eigen;
+
+int main()
+{
+  VectorXf a(10), b(10);
+#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
+  const DenseBase<VectorXf> &ac(a);
+#else
+  DenseBase<VectorXf> &ac(a);
+#endif
+  b.swap(ac);
+}