TensorValue.h

// Copyright 2024, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
 
#include "neml2/tensors/tensors.h"
 
namespace neml2
{
class TensorValueBase
{
public:
  virtual ~TensorValueBase() = default;
 
  virtual void to_(const torch::TensorOptions &) = 0;
 
  virtual void requires_grad_(bool req = true) = 0;
 
  virtual operator Tensor() const = 0;
 
  virtual void operator=(const Tensor & val) = 0;
 
  virtual TensorType type() const = 0;
};
 
template <typename T>
class TensorValue : public TensorValueBase
{
public:
  TensorValue() = default;
 
  explicit TensorValue(const T & value)
    : _value(value)
  {
  }
 
  virtual void to_(const torch::TensorOptions & options) override { _value = _value.to(options); }
 
  virtual void requires_grad_(bool req = true) override { _value.requires_grad_(req); }
 
  virtual operator Tensor() const override { return _value; }
 
  virtual void operator=(const Tensor & val) override { _value = T(val); }
 
  virtual TensorType type() const override { return TensorTypeEnum<T>::value; }
 
  T & value() { return _value; }
 
private:
  T _value;
};
} // namespace neml2