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Define internal::make_unsigned for [unsigned]long long on macOS.

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macOS defines int64_t as long long even for C++03 and therefore expects
a template specialization

  internal::make_unsigned<long long>,

for C++03. Since other platforms define int64_t as long for C++03 we
cannot add the specialization for all cases.
This commit is contained in:
David Tellenbach 2021-02-17 23:03:10 +01:00
parent 0845df7f77
commit 5336ad8591
1 changed files with 9 additions and 3 deletions
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12
Eigen/src/Core/util/Meta.h
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@ -194,9 +194,15 @@ template<> struct make_unsigned<signed __int64> { typedef unsigned __int64 typ
template<> struct make_unsigned<unsigned __int64> { typedef unsigned __int64 type; };
#endif
// TODO: Some platforms define int64_t as long long even for C++03. In this case
// we are missing the definition for make_unsigned. If we just define it, we get
// duplicated definitions for platforms defining int64_t as signed long for C++03
// Some platforms define int64_t as long long even for C++03. In this case we
// are missing the definition for make_unsigned. If we just define it, we get
// duplicated definitions for platforms defining int64_t as signed long for
// C++03. We therefore add the specialization for C++03 long long for these
// platforms only.
#if EIGEN_OS_MAC
template<> struct make_unsigned<unsigned long long> { typedef unsigned long long type; };
template<> struct make_unsigned<long long> { typedef unsigned long long type; };
#endif
#endif
template <typename T> struct add_const { typedef const T type; };