add utility for wrapping cells vector as dense value

3 files changed, 41 insertions, 0 deletions

diff --git a/eval/src/vespa/eval/eval/CMakeLists.txt b/eval/src/vespa/eval/eval/CMakeLists.txt
index d32841520a6..57c0db1719b 100644
--- a/eval/src/vespa/eval/eval/CMakeLists.txt
+++ b/eval/src/vespa/eval/eval/CMakeLists.txt
@@ -8,6 +8,7 @@ vespa_add_library(eval_eval OBJECT
     cell_type.cpp
     compile_tensor_function.cpp
     delete_node.cpp
+    dense_cells_value.cpp
     double_value_builder.cpp
     fast_forest.cpp
     fast_sparse_map.cpp
diff --git a/eval/src/vespa/eval/eval/dense_cells_value.cpp b/eval/src/vespa/eval/eval/dense_cells_value.cpp
new file mode 100644
index 00000000000..15de4dc0b26
--- /dev/null
+++ b/eval/src/vespa/eval/eval/dense_cells_value.cpp
@@ -0,0 +1,12 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include "dense_cells_value.h"
+
+namespace vespalib::eval {
+
+template<typename T> DenseCellsValue<T>::~DenseCellsValue() = default;
+
+template class DenseCellsValue<double>;
+template class DenseCellsValue<float>;
+
+}
diff --git a/eval/src/vespa/eval/eval/dense_cells_value.h b/eval/src/vespa/eval/eval/dense_cells_value.h
new file mode 100644
index 00000000000..021203ec78a
--- /dev/null
+++ b/eval/src/vespa/eval/eval/dense_cells_value.h
@@ -0,0 +1,28 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/eval/eval/value.h>
+
+namespace vespalib::eval {
+
+/**
+ * A dense-only value that just owns a vector of cells.
+ **/
+template<typename T>
+class DenseCellsValue : public Value {
+private:
+    const ValueType &_type;
+    std::vector<T> _cells;
+public:
+    DenseCellsValue(const ValueType &type_ref, std::vector<T> cells)
+      : _type(type_ref), _cells(std::move(cells))
+    {}
+    const ValueType &type() const override { return _type; }
+    TypedCells cells() const override { return TypedCells(_cells); }
+    const Index &index() const override { return TrivialIndex::get(); }
+    MemoryUsage get_memory_usage() const override {
+        return self_memory_usage<DenseCellsValue<T>>();
+    }
+    ~DenseCellsValue();
+};
+
+}