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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/eval/eval/tensor_function.h>
namespace vespalib::eval {
/**
* Tensor function performing dot product compatible operations
* (join:mul, reduce:sum) on values of arbitrary complexity.
*
* Note: can evaluate 'anything', but unless 'force' is given; will
* try to be a bit conservative about when to optimize.
**/
class UniversalDotProduct : public tensor_function::Op2
{
public:
UniversalDotProduct(const ValueType &res_type, const TensorFunction &lhs, const TensorFunction &rhs);
InterpretedFunction::Instruction compile_self(const ValueBuilderFactory &factory, Stash &stash) const override;
bool result_is_mutable() const override { return true; }
bool forward() const;
bool distinct() const;
bool single() const;
static const TensorFunction &optimize(const TensorFunction &expr, Stash &stash, bool force);
};
} // namespace
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