Use a simpler way of appending

1 files changed, 2 insertions, 3 deletions

diff --git a/staging_vespalib/src/vespa/vespalib/util/polymorphicarrays.h b/staging_vespalib/src/vespa/vespalib/util/polymorphicarrays.h
index d76b3f09020..721a33ae7da 100644
--- a/staging_vespalib/src/vespa/vespalib/util/polymorphicarrays.h
+++ b/staging_vespalib/src/vespa/vespalib/util/polymorphicarrays.h
@@ -24,9 +24,8 @@ public:
     size_t size() const override { return _array.size(); }
     iterator erase(iterator it) override  { _array.erase(_array.begin() + (it - this->begin())); return it; }
     void push_back(const B & v) override {
-        size_t sz(_array.size());
-        _array.resize(sz + 1);
-        _array[sz].assign(v);
+        _array.emplace_back();
+        _array.back().assign(v);
     }
 private:
     std::vector<T> _array;