UserFixedDimTensor.cxx

// Copyright 2023, 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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#include "neml2/tensors/user_tensors/UserFixedDimTensor.h"
 
namespace neml2
{
#define USERFIXEDDIMTENSOR_REGISTER(T) register_NEML2_object_alias(User##T, #T)
FOR_ALL_FIXEDDIMTENSOR(USERFIXEDDIMTENSOR_REGISTER);
 
template <typename T>
OptionSet
UserFixedDimTensor<T>::expected_options()
{
  // This is the only way of getting tensor type in a static method like this...
  // Trim 6 chars to remove 'neml2::'
  auto tensor_type = utils::demangle(typeid(T).name()).substr(7);
 
  OptionSet options = UserTensor::expected_options();
  options.doc() =
      "Construct a " + tensor_type +
      " from a vector values. The vector will be reshaped according to the specified batch shape.";
 
  options.set<std::vector<Real>>("values");
  options.set("values").doc() = "Values in this (flattened) tensor";
 
  options.set<TorchShape>("batch_shape") = {};
  options.set("batch_shape").doc() = "Batch shape";
 
  return options;
}
 
template <typename T>
UserFixedDimTensor<T>::UserFixedDimTensor(const OptionSet & options)
  : T(T::empty(options.get<TorchShape>("batch_shape"), default_tensor_options())),
    UserTensor(options)
{
  auto vals = options.get<std::vector<Real>>("values");
  auto flat = torch::tensor(vals, default_tensor_options());
  if (vals.size() == size_t(this->base_storage()))
    this->index_put_({torch::indexing::Ellipsis}, flat.reshape(this->base_sizes()));
  else if (vals.size() == size_t(utils::storage_size(this->sizes())))
    this->index_put_({torch::indexing::Ellipsis}, flat.reshape(this->sizes()));
  else
    neml_assert(false,
                "Number of values ",
                vals.size(),
                " must equal to either the base storage size ",
                this->base_storage(),
                " or the total storage size ",
                utils::storage_size(this->sizes()));
}
 
#define USERFIXEDDIMTENSOR_INSTANTIATE_FIXEDDIMTENSOR(T) template class UserFixedDimTensor<T>
FOR_ALL_FIXEDDIMTENSOR(USERFIXEDDIMTENSOR_INSTANTIATE_FIXEDDIMTENSOR);
} // namespace neml2