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-rw-r--r--boost/compute/algorithm/set_union.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/boost/compute/algorithm/set_union.hpp b/boost/compute/algorithm/set_union.hpp
index c61f7b29b3..6b405a0905 100644
--- a/boost/compute/algorithm/set_union.hpp
+++ b/boost/compute/algorithm/set_union.hpp
@@ -135,6 +135,8 @@ private:
/// will be stored
/// \param queue Queue on which to execute
///
+/// Space complexity:
+/// \Omega(2(distance(\p first1, \p last1) + distance(\p first2, \p last2)))
template<class InputIterator1, class InputIterator2, class OutputIterator>
inline OutputIterator set_union(InputIterator1 first1,
InputIterator1 last1,