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Add to_array

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Peter Dimov
2025-02-23 20:45:50 +02:00
parent 9b508e3ad2
commit 37289c5d92
3 changed files with 163 additions and 10 deletions
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65
include/boost/array.hpp
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@ -430,17 +430,62 @@ namespace boost {
return arg.elems;
}
template <size_t Idx, typename T, size_t N>
BOOST_CXX14_CONSTEXPR T &get(boost::array<T,N> &arr) BOOST_NOEXCEPT {
BOOST_STATIC_ASSERT_MSG ( Idx < N, "boost::get<>(boost::array &) index out of range" );
return arr[Idx];
}
template <size_t Idx, typename T, size_t N>
BOOST_CXX14_CONSTEXPR T &get(boost::array<T,N> &arr) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT_MSG ( Idx < N, "boost::get<>(boost::array &) index out of range" );
return arr[Idx];
}
template <size_t Idx, typename T, size_t N>
BOOST_CONSTEXPR const T &get(const boost::array<T,N> &arr) BOOST_NOEXCEPT {
BOOST_STATIC_ASSERT_MSG ( Idx < N, "boost::get<>(const boost::array &) index out of range" );
return arr[Idx];
}
template <size_t Idx, typename T, size_t N>
BOOST_CONSTEXPR const T &get(const boost::array<T,N> &arr) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT_MSG ( Idx < N, "boost::get<>(const boost::array &) index out of range" );
return arr[Idx];
}
template<class T, std::size_t N>
BOOST_CXX14_CONSTEXPR array<T, N> to_array( T const (&a)[ N ] )
{
array<T, N> r = {};
for( std::size_t i = 0; i < N; ++i )
{
r[ i ] = a[ i ];
}
return r;
}
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template<class T, std::size_t N>
BOOST_CXX14_CONSTEXPR array<T, N> to_array( T (&&a)[ N ] )
{
array<T, N> r = {};
for( std::size_t i = 0; i < N; ++i )
{
r[ i ] = std::move( a[ i ] );
}
return r;
}
template<class T, std::size_t N>
BOOST_CXX14_CONSTEXPR array<T, N> to_array( T const (&&a)[ N ] )
{
array<T, N> r = {};
for( std::size_t i = 0; i < N; ++i )
{
r[ i ] = a[ i ];
}
return r;
}
#endif
} /* namespace boost */