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Enable DSizes type promotion with c++03 compilers

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This commit is contained in:
Eugene Zhulenev 2018-09-18 10:57:00 -07:00
parent 1f0c941c3d
commit 218a7b9840
2 changed files with 15 additions and 12 deletions
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20
unsupported/Eigen/CXX11/src/Tensor/TensorDimensions.h
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@ -290,22 +290,24 @@ struct DSizes : array<DenseIndex, NumDims> {
}
}
#ifdef EIGEN_HAS_CXX11
// Enable DSizes index type promotion only if we are promoting to the
// larger type, e.g. allow to promote dimensions of type int to long.
template<typename OtherIndex,
typename std::enable_if<
std::is_same<
DenseIndex,
typename internal::promote_index_type<DenseIndex, OtherIndex>::type
>::value, int>::type = 0>
template<typename OtherIndex>
EIGEN_DEVICE_FUNC
explicit DSizes(const array<OtherIndex, NumDims>& other) {
explicit DSizes(const array<OtherIndex, NumDims>& other,
// Default template parameters require c++11.
typename internal::enable_if<
internal::is_same<
DenseIndex,
typename internal::promote_index_type<
DenseIndex,
OtherIndex
>::type
>::value, void*>::type = 0) {
for (int i = 0; i < NumDims; ++i) {
(*this)[i] = static_cast<DenseIndex>(other[i]);
}
}
#endif // EIGEN_HAS_CXX11
#ifdef EIGEN_HAS_INDEX_LIST
template <typename FirstType, typename... OtherTypes>

7
unsupported/test/cxx11_tensor_dimension.cpp
View File

@ -61,9 +61,11 @@ static void test_rank_zero()
}
static void test_index_type_promotion() {
#ifdef EIGEN_HAS_CXX11
Eigen::DSizes<int, 3> src0(1, 2, 3);
Eigen::array<int, 3> src1 = {4, 5, 6};
Eigen::array<int, 3> src1;
src1[0] = 4;
src1[1] = 5;
src1[2] = 6;
Eigen::DSizes<long, 3> dst0(src0);
Eigen::DSizes<long, 3> dst1(src1);
@ -74,7 +76,6 @@ static void test_index_type_promotion() {
VERIFY_IS_EQUAL(dst1[0], 4L);
VERIFY_IS_EQUAL(dst1[1], 5L);
VERIFY_IS_EQUAL(dst1[2], 6L);
#endif // EIGEN_HAS_CXX11
}
EIGEN_DECLARE_TEST(cxx11_tensor_dimension)