view_detectors.hpp

// SPDX-FileCopyrightText: Intel Corporation
//
// SPDX-License-Identifier: BSD-3-Clause
 
#pragma once
 
#include <type_traits>
 
namespace dr {
 
template <typename T> struct is_ref_view : std::false_type {};
template <rng::range R>
struct is_ref_view<rng::ref_view<R>> : std::true_type {};
 
template <typename T> inline constexpr bool is_ref_view_v = is_ref_view<T>{};
 
template <typename T> struct is_iota_view : std::false_type {};
template <std::weakly_incrementable W>
struct is_iota_view<rng::iota_view<W>> : std::true_type {};
 
template <typename T> inline constexpr bool is_iota_view_v = is_iota_view<T>{};
 
template <typename T> struct is_take_view : std::false_type {};
template <typename T>
struct is_take_view<rng::take_view<T>> : std::true_type {};
 
template <typename T>
inline constexpr bool is_take_view_v = is_take_view<T>::value;
 
template <typename T> struct is_drop_view : std::false_type {};
template <typename T>
struct is_drop_view<rng::drop_view<T>> : std::true_type {};
 
template <typename T>
inline constexpr bool is_drop_view_v = is_drop_view<T>::value;
 
template <typename T> struct is_subrange_view : std::false_type {};
template <typename T>
struct is_subrange_view<rng::subrange<T>> : std::true_type {};
 
template <typename T>
inline constexpr bool is_subrange_view_v = is_subrange_view<T>::value;
 
template <typename T> struct is_sliding_view : std::false_type {};
template <typename T>
struct is_sliding_view<rng::sliding_view<T>> : std::true_type {};
template <typename T>
inline constexpr bool is_sliding_view_v =
    is_sliding_view<std::remove_cvref_t<T>>::value;
 
template <typename T> struct is_zip_view : std::false_type {};
 
template <typename... Views>
struct is_zip_view<rng::zip_view<Views...>> : std::true_type {};
 
template <typename T>
inline constexpr bool is_zip_view_v = is_zip_view<T>::value;
 
} // namespace dr