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Simplify tree_index_sequence

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This commit is contained in:
Kp 2017-06-25 20:46:03 +00:00
parent 1e5bf33fc0
commit 103e4a4fb6
1 changed files with 4 additions and 4 deletions
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8
common/include/compiler-integer_sequence.h
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@ -10,20 +10,20 @@ template <std::size_t...>
struct index_sequence {};
#endif
template <std::size_t, typename, std::size_t, typename>
template <typename, std::size_t, typename>
struct cat_index_sequence;
template <std::size_t... N1, std::size_t A2, std::size_t... N2>
struct cat_index_sequence<0, index_sequence<N1...>, A2, index_sequence<N2...>>
struct cat_index_sequence<index_sequence<N1...>, A2, index_sequence<N2...>>
{
typedef index_sequence<N1..., A2 + N2...> type;
};
/* Fan out to reduce template depth */
template <std::size_t N>
struct tree_index_sequence
struct tree_index_sequence :
cat_index_sequence<typename tree_index_sequence<N / 2>::type, N / 2, typename tree_index_sequence<(N + 1) / 2>::type>
{
typedef typename cat_index_sequence<0, typename tree_index_sequence<N / 2>::type, N / 2, typename tree_index_sequence<(N + 1) / 2>::type>::type type;
};
template <>