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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 creating a new dense tensor based on peeking cells
* of a single existing dense tensor. Which cells to peek is described
* by a single (compilable) function mapping the individual dimension
* indexes of the tensor to be created into global cell indexes of the
* tensor to be peeked.
**/
class DenseLambdaPeekFunction : public tensor_function::Op1
{
private:
std::shared_ptr<Function const> _idx_fun;
public:
DenseLambdaPeekFunction(const ValueType &result_type,
const TensorFunction &child,
std::shared_ptr<Function const> idx_fun);
~DenseLambdaPeekFunction() override;
InterpretedFunction::Instruction compile_self(const ValueBuilderFactory &factory, Stash &stash) const override;
vespalib::string idx_fun_dump() const;
bool result_is_mutable() const override { return true; }
};
} // namespace
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