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Support up to three tuples in tuple_transform under msvc-12.0

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This commit is contained in:
Peter Dimov
2020-05-24 01:14:46 +03:00
parent 917ac15ee1
commit a0ea1055d2
3 changed files with 33 additions and 67 deletions
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68
include/boost/mp11/tuple.hpp
View File

@ -93,40 +93,6 @@ template<class Tp, class F> BOOST_MP11_CONSTEXPR F tuple_for_each( Tp && tp, F &
namespace detail
{
template<class... T> BOOST_MP11_CONSTEXPR auto tp_forward( T&&... t ) -> std::tuple<T...>
{
return std::tuple<T...>( std::forward<T>( t )... );
}
} // namespace detail
#if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
namespace detail
{
template<class F, class Tp, std::size_t... J>
BOOST_MP11_CONSTEXPR auto tuple_transform_impl( integer_sequence<std::size_t, J...>, F const& f, Tp&& tp )
-> decltype( tp_forward( f( std::get<J>( std::forward<Tp>(tp) ) )... ) )
{
return tp_forward( f( std::get<J>( std::forward<Tp>(tp) ) )... );
}
} // namespace detail
template<class F, class Tp,
class Seq = make_index_sequence<std::tuple_size<typename std::remove_reference<Tp>::type>::value>>
BOOST_MP11_CONSTEXPR auto tuple_transform( F const& f, Tp&& tp )
-> decltype( detail::tuple_transform_impl( Seq(), f, std::forward<Tp>(tp) ) )
{
return detail::tuple_transform_impl( Seq(), f, std::forward<Tp>(tp) );
}
#else
namespace detail
{
template<std::size_t J, class... Tp>
BOOST_MP11_CONSTEXPR auto tp_extract( Tp&&... tp )
-> decltype( std::forward_as_tuple( std::get<J>( std::forward<Tp>( tp ) )... ) )
@ -134,6 +100,13 @@ BOOST_MP11_CONSTEXPR auto tp_extract( Tp&&... tp )
return std::forward_as_tuple( std::get<J>( std::forward<Tp>( tp ) )... );
}
template<class... T> BOOST_MP11_CONSTEXPR auto tp_forward( T&&... t ) -> std::tuple<T...>
{
return std::tuple<T...>( std::forward<T>( t )... );
}
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
template<class F, class... Tp, std::size_t... J>
BOOST_MP11_CONSTEXPR auto tuple_transform_impl( integer_sequence<std::size_t, J...>, F const& f, Tp&&... tp )
-> decltype( tp_forward( tuple_apply( f, tp_extract<J>( std::forward<Tp>(tp)... ) )... ) )
@ -141,6 +114,31 @@ BOOST_MP11_CONSTEXPR auto tuple_transform_impl( integer_sequence<std::size_t, J.
return tp_forward( tuple_apply( f, tp_extract<J>( std::forward<Tp>(tp)... ) )... );
}
#else
template<class F, class Tp1, std::size_t... J>
BOOST_MP11_CONSTEXPR auto tuple_transform_impl( integer_sequence<std::size_t, J...>, F const& f, Tp1&& tp1 )
-> decltype( tp_forward( f( std::get<J>( std::forward<Tp1>(tp1) ) )... ) )
{
return tp_forward( f( std::get<J>( std::forward<Tp1>(tp1) ) )... );
}
template<class F, class Tp1, class Tp2, std::size_t... J>
BOOST_MP11_CONSTEXPR auto tuple_transform_impl( integer_sequence<std::size_t, J...>, F const& f, Tp1&& tp1, Tp2&& tp2 )
-> decltype( tp_forward( f( std::get<J>( std::forward<Tp1>(tp1) ), std::get<J>( std::forward<Tp2>(tp2) ) )... ) )
{
return tp_forward( f( std::get<J>( std::forward<Tp1>(tp1) ), std::get<J>( std::forward<Tp2>(tp2) ) )... );
}
template<class F, class Tp1, class Tp2, class Tp3, std::size_t... J>
BOOST_MP11_CONSTEXPR auto tuple_transform_impl( integer_sequence<std::size_t, J...>, F const& f, Tp1&& tp1, Tp2&& tp2, Tp3&& tp3 )
-> decltype( tp_forward( f( std::get<J>( std::forward<Tp1>(tp1) ), std::get<J>( std::forward<Tp2>(tp2) ), std::get<J>( std::forward<Tp3>(tp3) ) )... ) )
{
return tp_forward( f( std::get<J>( std::forward<Tp1>(tp1) ), std::get<J>( std::forward<Tp2>(tp2) ), std::get<J>( std::forward<Tp3>(tp3) ) )... );
}
#endif // !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
} // namespace detail
#if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1910 )
@ -167,8 +165,6 @@ BOOST_MP11_CONSTEXPR auto tuple_transform( F const& f, Tp&&... tp )
#endif // BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1910 )
#endif // BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
} // namespace mp11
} // namespace boost

20
test/tuple_transform.cpp
View File

@ -58,8 +58,6 @@ int main()
BOOST_TEST_EQ( std::get<2>(s).value, 5 );
}
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
{
std::tuple<T<5>, T<7>, T<9>> s = tuple_transform( F{}, tp, tp2 );
BOOST_TEST_EQ( std::get<0>(s).value, 6 );
@ -75,8 +73,6 @@ int main()
BOOST_TEST_EQ( std::get<1>(s).value, 8 );
BOOST_TEST_EQ( std::get<2>(s).value, 10 );
}
#endif
}
{
@ -97,8 +93,6 @@ int main()
BOOST_TEST_EQ( std::get<2>(s).value, 5 );
}
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
{
std::tuple<T<5>, T<7>, T<9>> s = tuple_transform( F{}, tp, tp2 );
BOOST_TEST_EQ( std::get<0>(s).value, 6 );
@ -114,8 +108,6 @@ int main()
BOOST_TEST_EQ( std::get<1>(s).value, 8 );
BOOST_TEST_EQ( std::get<2>(s).value, 10 );
}
#endif
}
{
@ -134,8 +126,6 @@ int main()
BOOST_TEST_EQ( std::get<1>(s).value, 4 );
}
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
{
std::tuple<T<4>, T<6>> s = tuple_transform( F{}, tp, tp2 );
BOOST_TEST_EQ( std::get<0>(s).value, 5 );
@ -149,9 +139,6 @@ int main()
BOOST_TEST_EQ( std::get<0>(s).value, 5 );
BOOST_TEST_EQ( std::get<1>(s).value, 7 );
}
#endif
}
{
@ -170,8 +157,6 @@ int main()
BOOST_TEST_EQ( std::get<1>(s).value, 4 );
}
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
{
std::tuple<T<4>, T<6>> s = tuple_transform( F{}, tp, tp2 );
BOOST_TEST_EQ( std::get<0>(s).value, 5 );
@ -185,10 +170,7 @@ int main()
BOOST_TEST_EQ( std::get<0>(s).value, 5 );
BOOST_TEST_EQ( std::get<1>(s).value, 7 );
}
#endif
}
}
{
std::tuple<> tp;

12
test/tuple_transform_2.cpp
View File

@ -63,8 +63,6 @@ int main()
BOOST_TEST_EQ( std::get<0>( r ), 2 );
}
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
{
std::tuple<int> r = tuple_transform( g, ::make_array( 1 ), std::make_tuple( 2 ) );
@ -77,8 +75,6 @@ int main()
BOOST_TEST_EQ( std::get<0>( r ), 6 );
}
#endif
//
{
@ -102,8 +98,6 @@ int main()
BOOST_TEST_EQ( std::get<1>( r ), 3 );
}
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
{
std::tuple<int, int> r = tuple_transform( g, ::make_array( 1, 2 ), std::make_pair( 3, 4 ) );
@ -118,8 +112,6 @@ int main()
BOOST_TEST_EQ( std::get<1>( r ), 12 );
}
#endif
//
{
@ -138,8 +130,6 @@ int main()
BOOST_TEST_EQ( std::get<2>( r ), 4 );
}
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
{
std::tuple<int, int, int> r = tuple_transform( g, ::make_array( 1, 2, 3 ), std::make_tuple( 4, 5, 6 ) );
@ -156,8 +146,6 @@ int main()
BOOST_TEST_EQ( std::get<2>( r ), 18 );
}
#endif
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
{