init

Telegram/ThirdParty/range-v3/include/range/v3/view/take_last.hpp

@@ -0,0 +1,66 @@
+/// \file
+// Range v3 library
+//
+//  Copyright Barry Revzin 2019-present
+//
+//  Use, modification and distribution is subject to the
+//  Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+// Project home: https://github.com/ericniebler/range-v3
+//
+
+#ifndef RANGES_V3_VIEW_TAKE_LAST_HPP
+#define RANGES_V3_VIEW_TAKE_LAST_HPP
+
+#include <concepts/concepts.hpp>
+
+#include <range/v3/range_fwd.hpp>
+
+#include <range/v3/functional/bind_back.hpp>
+#include <range/v3/range/concepts.hpp>
+#include <range/v3/range/operations.hpp>
+#include <range/v3/view/drop_exactly.hpp>
+
+#include <range/v3/detail/prologue.hpp>
+
+namespace ranges
+{
+    /// \addtogroup group-views
+    /// @{
+
+    namespace views
+    {
+        struct take_last_base_fn
+        {
+            template(typename Rng)(
+                requires viewable_range<Rng> AND sized_range<Rng>)
+            auto operator()(Rng && rng, range_difference_t<Rng> n) const
+            {
+                auto sz = ranges::distance(rng);
+                return drop_exactly(static_cast<Rng &&>(rng), sz > n ? sz - n : 0);
+            }
+        };
+
+        struct take_last_fn : take_last_base_fn
+        {
+            using take_last_base_fn::operator();
+
+            template(typename Int)(
+                requires detail::integer_like_<Int>)
+            constexpr auto operator()(Int n) const
+            {
+                return make_view_closure(bind_back(take_last_base_fn{}, n));
+            }
+        };
+
+        /// \relates take_last_fn
+        RANGES_INLINE_VARIABLE(take_last_fn, take_last)
+    } // namespace views
+    /// @}
+} // namespace ranges
+
+#include <range/v3/detail/epilogue.hpp>
+
+#endif