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Updated the custom indexing code: we can now use any container that provides the [] operator to index a tensor. Added unit tests to validate the use of std::map and a few more types as valid custom index containers

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This commit is contained in:
Benoit Steiner 2015-10-15 14:58:49 -07:00
parent 6585efc553
commit de1e9f29f4
4 changed files with 78 additions and 23 deletions
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15
unsupported/Eigen/CXX11/src/Tensor/Tensor.h
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@ -120,11 +120,8 @@ class Tensor : public TensorBase<Tensor<Scalar_, NumIndices_, Options_, IndexTyp
EIGEN_STATIC_ASSERT(sizeof...(otherIndices) + 2 == NumIndices, YOU_MADE_A_PROGRAMMING_MISTAKE)
return coeff(array<Index, NumIndices>{{firstIndex, secondIndex, otherIndices...}});
}
#endif
// normal indices
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar& coeff(const array<Index, NumIndices>& indices) const
{
@ -137,7 +134,7 @@ class Tensor : public TensorBase<Tensor<Scalar_, NumIndices_, Options_, IndexTyp
template<typename CustomIndices,
EIGEN_SFINAE_ENABLE_IF( !(isOfNormalIndex<CustomIndices>::value) )
>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar& coeff(const CustomIndices & indices) const
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar& coeff(CustomIndices& indices) const
{
return coeff(internal::customIndices2Array<Index,NumIndices>(indices));
}
@ -171,7 +168,7 @@ class Tensor : public TensorBase<Tensor<Scalar_, NumIndices_, Options_, IndexTyp
template<typename CustomIndices,
EIGEN_SFINAE_ENABLE_IF( !(isOfNormalIndex<CustomIndices>::value) )
>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Scalar& coeffRef(const CustomIndices & indices)
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Scalar& coeffRef(CustomIndices& indices)
{
return coeffRef(internal::customIndices2Array<Index,NumIndices>(indices));
}
@ -219,7 +216,7 @@ class Tensor : public TensorBase<Tensor<Scalar_, NumIndices_, Options_, IndexTyp
template<typename CustomIndices,
EIGEN_SFINAE_ENABLE_IF( !(isOfNormalIndex<CustomIndices>::value) )
>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar& operator()(const CustomIndices & indices) const
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar& operator()(CustomIndices& indices) const
{
return coeff(internal::customIndices2Array<Index,NumIndices>(indices));
}
@ -286,7 +283,7 @@ class Tensor : public TensorBase<Tensor<Scalar_, NumIndices_, Options_, IndexTyp
template<typename CustomIndices,
EIGEN_SFINAE_ENABLE_IF( !(isOfNormalIndex<CustomIndices>::value) )
>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Scalar& operator()(const CustomIndices & indices)
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Scalar& operator()(CustomIndices& indices)
{
return coeffRef(internal::customIndices2Array<Index,NumIndices>(indices));
}
@ -441,9 +438,9 @@ class Tensor : public TensorBase<Tensor<Scalar_, NumIndices_, Options_, IndexTyp
template<typename CustomDimension,
EIGEN_SFINAE_ENABLE_IF( !(isOfNormalIndex<CustomDimension>::value) )
>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void resize(const CustomDimension & dimensions)
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void resize(CustomDimension& dimensions)
{
return coeffRef(internal::customIndices2Array<Index,NumIndices>(dimensions));
resize(internal::customIndices2Array<Index,NumIndices>(dimensions));
}
#endif

6
unsupported/Eigen/CXX11/src/Tensor/TensorMeta.h
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@ -82,14 +82,14 @@ namespace internal{
template<typename IndexType, Index... Is>
EIGEN_CONSTEXPR EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
array<Index,sizeof...(Is)> customIndices2Array(const IndexType & idx, numeric_list<Index,Is...>) {
return { idx(Is)... };
array<Index, sizeof...(Is)> customIndices2Array(IndexType& idx, numeric_list<Index, Is...>) {
return { idx[Is]... };
}
/** Make an array (for index/dimensions) out of a custom index */
template<typename Index, int NumIndices, typename IndexType>
EIGEN_CONSTEXPR EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
array<Index,NumIndices> customIndices2Array(const IndexType & idx) {
array<Index, NumIndices> customIndices2Array(IndexType& idx) {
return customIndices2Array(idx, typename gen_numeric_list<Index, NumIndices>::type{});
}

68
unsupported/test/cxx11_tensor_custom_index.cpp
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@ -9,6 +9,7 @@
#include "main.h"
#include <limits>
#include <map>
#include <Eigen/Dense>
#include <Eigen/CXX11/Tensor>
@ -17,8 +18,31 @@ using Eigen::Tensor;
template <int DataLayout>
static void test_custom_index() {
static void test_map_as_index()
{
#ifdef EIGEN_HAS_SFINAE
Tensor<float, 4, DataLayout> tensor(2, 3, 5, 7);
tensor.setRandom();
using NormalIndex = DSizes<ptrdiff_t, 4>;
using CustomIndex = std::map<ptrdiff_t, ptrdiff_t>;
CustomIndex coeffC;
coeffC[0] = 1;
coeffC[1] = 2;
coeffC[2] = 4;
coeffC[3] = 1;
NormalIndex coeff(1,2,4,1);
VERIFY_IS_EQUAL(tensor.coeff(coeffC), tensor.coeff(coeff));
VERIFY_IS_EQUAL(tensor.coeffRef(coeffC), tensor.coeffRef(coeff));
#endif
}
template <int DataLayout>
static void test_matrix_as_index()
{
#ifdef EIGEN_HAS_SFINAE
Tensor<float, 4, DataLayout> tensor(2, 3, 5, 7);
tensor.setRandom();
@ -29,10 +53,48 @@ static void test_custom_index() {
VERIFY_IS_EQUAL(tensor.coeff(coeffC), tensor.coeff(coeff));
VERIFY_IS_EQUAL(tensor.coeffRef(coeffC), tensor.coeffRef(coeff));
#endif
}
template <int DataLayout>
static void test_varlist_as_index()
{
#ifdef EIGEN_HAS_SFINAE
Tensor<float, 4, DataLayout> tensor(2, 3, 5, 7);
tensor.setRandom();
DSizes<ptrdiff_t, 4> coeff(1,2,4,1);
VERIFY_IS_EQUAL(tensor.coeff({1,2,4,1}), tensor.coeff(coeff));
VERIFY_IS_EQUAL(tensor.coeffRef({1,2,4,1}), tensor.coeffRef(coeff));
#endif
}
template <int DataLayout>
static void test_sizes_as_index()
{
#ifdef EIGEN_HAS_SFINAE
Tensor<float, 4, DataLayout> tensor(2, 3, 5, 7);
tensor.setRandom();
DSizes<ptrdiff_t, 4> coeff(1,2,4,1);
Sizes<1,2,4,1> coeffC;
VERIFY_IS_EQUAL(tensor.coeff(coeffC), tensor.coeff(coeff));
VERIFY_IS_EQUAL(tensor.coeffRef(coeffC), tensor.coeffRef(coeff));
#endif
}
void test_cxx11_tensor_custom_index() {
test_custom_index<ColMajor>();
test_custom_index<RowMajor>();
test_map_as_index<ColMajor>();
test_map_as_index<RowMajor>();
test_matrix_as_index<ColMajor>();
test_matrix_as_index<RowMajor>();
test_varlist_as_index<ColMajor>();
test_varlist_as_index<RowMajor>();
test_sizes_as_index<ColMajor>();
test_sizes_as_index<RowMajor>();
}

4
unsupported/test/cxx11_tensor_simple.cpp
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@ -293,7 +293,3 @@ void test_cxx11_tensor_simple()
CALL_SUBTEST(test_simple_assign());
CALL_SUBTEST(test_resize());
}
/*
* kate: space-indent on; indent-width 2; mixedindent off; indent-mode cstyle;
*/