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Work around with Visual Studio 2015 issue

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Was getting the following error:

vtkm/List.h(284): error C2210: 'T' : pack expansions cannot be used as
arguments to non-packed parameters in alias templates

This is probably an issue with the compiler not resolving templated
aliases correctly.
This commit is contained in:
Kenneth Moreland 2019-12-09 14:27:49 -07:00
parent 452a2e1c9c
commit 851864d0b5
1 changed files with 22 additions and 0 deletions
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22
vtkm/List.h
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@ -277,12 +277,34 @@ struct ListHasImpl<vtkm::ListUniversal, T>
template <typename List, typename T>
using ListHas = typename detail::ListHasImpl<internal::AsList<List>, T>::type;
#if defined(VTKM_MSVC) && (_MSC_VER < 1911)
// Alternate definition of ListAppend to get around an apparent issue with
// Visual Studio 2015.
namespace detail
{
template <typename... Lists>
struct ListAppendImpl
{
using type = brigand::append<internal::AsList<Lists>...>;
};
} // namespace detail
template <typename... Lists>
using ListAppend = typename detail::ListAppendImpl<Lists...>::type;
#else // Normal definition
/// Concatinates a set of lists into a single list.
///
/// Note that this does not work correctly with `vtkm::ListUniversal`.
template <typename... Lists>
using ListAppend = brigand::append<internal::AsList<Lists>...>;
#endif
namespace detail
{