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Add mp_pairwise_fold

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Peter Dimov
2020-10-12 22:12:42 +03:00
parent 0a12995d9d
commit db78dc101c
4 changed files with 80 additions and 0 deletions
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11
include/boost/mp11/algorithm.hpp
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@@ -1229,6 +1229,17 @@ template<class V, template<class...> class F, template<class...> class R> struct
template<class V, class Qf, class Qr> using mp_iterate_q = mp_iterate<V, Qf::template fn, Qr::template fn>;
// mp_pairwise_fold<L, F>
namespace detail
{
template<class L, class Q> using mp_pairwise_fold_impl = mp_transform_q<Q, mp_pop_back<L>, mp_pop_front<L>>;
} // namespace detail
template<class L, class Q> using mp_pairwise_fold_q = mp_eval_if<mp_empty<L>, mp_clear<L>, detail::mp_pairwise_fold_impl, L, Q>;
template<class L, template<class...> class F> using mp_pairwise_fold = mp_pairwise_fold_q<L, mp_quote<F>>;
} // namespace mp11
} // namespace boost