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Handle empty tensors in the print functions

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This commit is contained in:
Benoit Steiner 2016-06-21 09:22:43 -07:00
parent de32f8d656
commit c58df31747
1 changed files with 16 additions and 6 deletions
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22
unsupported/Eigen/CXX11/src/Tensor/TensorIO.h
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@ -26,10 +26,15 @@ struct TensorPrinter {
typedef typename internal::remove_const<typename Tensor::Scalar>::type Scalar; typedef typename internal::remove_const<typename Tensor::Scalar>::type Scalar;
typedef typename Tensor::Index Index; typedef typename Tensor::Index Index;
const Index total_size = internal::array_prod(tensor.dimensions()); const Index total_size = internal::array_prod(tensor.dimensions());
const Index first_dim = Eigen::internal::array_get<0>(tensor.dimensions()); if (total_size == 0) {
static const int layout = Tensor::Layout; os << "Empty tensor of rank " << Rank;
Map<const Array<Scalar, Dynamic, Dynamic, layout> > matrix(const_cast<Scalar*>(tensor.data()), first_dim, total_size/first_dim); }
os << matrix; else {
const Index first_dim = Eigen::internal::array_get<0>(tensor.dimensions());
static const int layout = Tensor::Layout;
Map<const Array<Scalar, Dynamic, Dynamic, layout> > matrix(const_cast<Scalar*>(tensor.data()), first_dim, total_size/first_dim);
os << matrix;
}
} }
}; };
@ -41,8 +46,13 @@ struct TensorPrinter<Tensor, 1> {
typedef typename internal::remove_const<typename Tensor::Scalar>::type Scalar; typedef typename internal::remove_const<typename Tensor::Scalar>::type Scalar;
typedef typename Tensor::Index Index; typedef typename Tensor::Index Index;
const Index total_size = internal::array_prod(tensor.dimensions()); const Index total_size = internal::array_prod(tensor.dimensions());
Map<const Array<Scalar, Dynamic, 1> > array(const_cast<Scalar*>(tensor.data()), total_size); if (total_size == 0) {
os << array; os << "Empty tensor of rank 1";
}
else {
Map<const Array<Scalar, Dynamic, 1> > array(const_cast<Scalar*>(tensor.data()), total_size);
os << array;
}
} }
}; };