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-rw-r--r--utils/sparse_vector.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/utils/sparse_vector.h b/utils/sparse_vector.h
index 207489c5..e8e9c2f7 100644
--- a/utils/sparse_vector.h
+++ b/utils/sparse_vector.h
@@ -412,6 +412,11 @@ private:
MapType values_;
};
+template <class T>
+inline void swap(SparseVector<T> &a,SparseVector<T> &b) {
+ a.swap(b);
+}
+
//like a pair but can live in a union, because it lacks default+copy ctors, dtor.
template <class T>
struct feature_val {