cat.hpp

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//
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#pragma once

#include <atria/xform/transducer_impl.hpp>
#include <atria/xform/reduce_nested.hpp>

namespace atria {
namespace xform {

namespace detail {

struct cat_rf_gen
{
  template <typename ReducingFnT>
  struct apply
  {
    ReducingFnT step;

    template <typename State, typename ...Inputs>
    auto operator() (State&& s, Inputs&& ...is)
      -> ABL_DECLTYPE_RETURN(
        reduce_nested(step,
                      std::forward<State>(s),
                      std::forward<Inputs>(is)...))
  };
};

} // namespace detail

using cat_t = transducer_impl<detail::cat_rf_gen>;

constexpr auto cat = cat_t {};

} // namespace xform
} // namespace atria