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-rw-r--r--klm/util/joint_sort.hh11
1 files changed, 7 insertions, 4 deletions
diff --git a/klm/util/joint_sort.hh b/klm/util/joint_sort.hh
index 13a52b67..5589c558 100644
--- a/klm/util/joint_sort.hh
+++ b/klm/util/joint_sort.hh
@@ -40,6 +40,12 @@ template <class KeyIter, class ValueIter> class JointIter {
swap(first.value_, second.value_);
}
+ void DeepSwap(JointIter &other) {
+ using std::swap;
+ swap(*key_, *other.key_);
+ swap(*value_, *other.value_);
+ }
+
private:
friend class JointProxy<KeyIter, ValueIter>;
KeyIter key_;
@@ -84,10 +90,7 @@ template <class KeyIter, class ValueIter> class JointProxy {
}
friend void swap(JointProxy<KeyIter, ValueIter> first, JointProxy<KeyIter, ValueIter> second) {
- // Allow argument-dependent lookup.
- using std::swap;
- swap(*first.inner_.key_, *second.inner_.key_);
- swap(*first.inner_.value_, *second.inner_.value_);
+ first.DeepSwap(second);
}
private: