elements.hpp

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//
// Created by yonggyulee on 2024/01/22.
//
 
#ifndef VCCC_RANGES_VIEWS_ELEMENTS_HPP
#define VCCC_RANGES_VIEWS_ELEMENTS_HPP
 
#include <type_traits>
#include <utility>
 
#include "vccc/__core/inline_or_static.hpp"
#include "vccc/__ranges/range_adaptor_closure.hpp"
#include "vccc/__ranges/viewable_range.hpp"
#include "vccc/__ranges/views/all.hpp"
#include "vccc/__ranges/views/elements_view.hpp"
 
namespace vccc {
namespace ranges {
namespace views {
namespace detail {
 
template<std::size_t N>
class elements_adaptor_object : public range_adaptor_closure<elements_adaptor_object<N>> {
 public:
  constexpr elements_adaptor_object() = default;
 
  template<typename R, std::enable_if_t<viewable_range<R>::value, int> = 0>
  constexpr auto operator()(R&& r) const {
    return elements_view<all_t<R>, N>(std::forward<R>(r));
  }
};
 
} // namespace detail
 
 
template<std::size_t N>
VCCC_INLINE_OR_STATIC constexpr detail::elements_adaptor_object<N> elements{};
 
 
} // namespace views
} // namespace ranges
} // namespace vccc
 
#endif // VCCC_RANGES_VIEWS_ELEMENTS_HPP