bug #632: add support for "dense +/- sparse" operations. The current implementation is based on SparseView to make the dense subexpression compatible with the sparse one.
diff --git a/test/sparse_basic.cpp b/test/sparse_basic.cpp
index d803e7d..5a56507 100644
--- a/test/sparse_basic.cpp
+++ b/test/sparse_basic.cpp
@@ -192,6 +192,11 @@
VERIFY_IS_APPROX(refM4.cwiseProduct(m3), refM4.cwiseProduct(refM3));
// VERIFY_IS_APPROX(m3.cwise()/refM4, refM3.cwise()/refM4);
+ VERIFY_IS_APPROX(refM4 + m3, refM4 + refM3);
+ VERIFY_IS_APPROX(m3 + refM4, refM3 + refM4);
+ VERIFY_IS_APPROX(refM4 - m3, refM4 - refM3);
+ VERIFY_IS_APPROX(m3 - refM4, refM3 - refM4);
+
// test aliasing
VERIFY_IS_APPROX((m1 = -m1), (refM1 = -refM1));
VERIFY_IS_APPROX((m1 = m1.transpose()), (refM1 = refM1.transpose().eval()));