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Work around clang++ 3.3 failure

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This commit is contained in:
Peter Dimov
2020-12-30 19:40:52 +02:00
parent 16e9536146
commit fa82b680cf
1 changed files with 13 additions and 5 deletions
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18
include/boost/core/bit.hpp
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@ -329,36 +329,44 @@ BOOST_CONSTEXPR int countr_one( T x ) BOOST_NOEXCEPT
#if defined(__GNUC__) || defined(__clang__)
#if defined(__clang__) && __clang_major__ * 100 + __clang_minor__ < 304
# define BOOST_CORE_POPCOUNT_CONSTEXPR
#else
# define BOOST_CORE_POPCOUNT_CONSTEXPR BOOST_CONSTEXPR
#endif
namespace detail
{
BOOST_CONSTEXPR inline int popcount_impl( unsigned char x ) BOOST_NOEXCEPT
BOOST_CORE_POPCOUNT_CONSTEXPR inline int popcount_impl( unsigned char x ) BOOST_NOEXCEPT
{
return __builtin_popcount( x );
}
BOOST_CONSTEXPR inline int popcount_impl( unsigned short x ) BOOST_NOEXCEPT
BOOST_CORE_POPCOUNT_CONSTEXPR inline int popcount_impl( unsigned short x ) BOOST_NOEXCEPT
{
return __builtin_popcount( x );
}
BOOST_CONSTEXPR inline int popcount_impl( unsigned int x ) BOOST_NOEXCEPT
BOOST_CORE_POPCOUNT_CONSTEXPR inline int popcount_impl( unsigned int x ) BOOST_NOEXCEPT
{
return __builtin_popcount( x );
}
BOOST_CONSTEXPR inline int popcount_impl( unsigned long x ) BOOST_NOEXCEPT
BOOST_CORE_POPCOUNT_CONSTEXPR inline int popcount_impl( unsigned long x ) BOOST_NOEXCEPT
{
return __builtin_popcountl( x );
}
BOOST_CONSTEXPR inline int popcount_impl( unsigned long long x ) BOOST_NOEXCEPT
BOOST_CORE_POPCOUNT_CONSTEXPR inline int popcount_impl( unsigned long long x ) BOOST_NOEXCEPT
{
return __builtin_popcountll( x );
}
} // namespace detail
#undef BOOST_CORE_POPCOUNT_CONSTEXPR
template<class T>
BOOST_CONSTEXPR int popcount( T x ) BOOST_NOEXCEPT
{