Horizon
take_last.hpp
Go to the documentation of this file.
1 // Range v3 library
3 //
4 // Copyright Barry Revzin 2019-present
5 //
6 // Use, modification and distribution is subject to the
7 // Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
10 //
11 // Project home: https://github.com/ericniebler/range-v3
12 //
13 
14 #ifndef RANGES_V3_VIEW_TAKE_LAST_HPP
15 #define RANGES_V3_VIEW_TAKE_LAST_HPP
16 
17 #include <concepts/concepts.hpp>
18 
19 #include <range/v3/range_fwd.hpp>
20 
25 
26 #include <range/v3/detail/prologue.hpp>
27 
28 namespace ranges
29 {
32 
33  namespace views
34  {
36  {
37  template(typename Rng)(
38  requires viewable_range<Rng> AND sized_range<Rng>)
39  auto operator()(Rng && rng, range_difference_t<Rng> n) const
40  {
41  auto sz = ranges::distance(rng);
42  return drop_exactly(static_cast<Rng &&>(rng), sz > n ? sz - n : 0);
43  }
44  };
45 
47  {
48  using take_last_base_fn::operator();
49 
50  template(typename Int)(
51  requires detail::integer_like_<Int>)
52  constexpr auto operator()(Int n) const
53  {
54  return make_view_closure(bind_back(take_last_base_fn{}, n));
55  }
56  };
57 
60  } // namespace views
62 } // namespace ranges
63 
64 #include <range/v3/detail/epilogue.hpp>
65 
66 #endif
RANGES_INLINE_VARIABLE(detail::to_container_fn< detail::from_range< std::vector >>, to_vector) template< template< typename... > class ContT > auto to(RANGES_HIDDEN_DETAIL(detail
For initializing a container of the specified type with the elements of an Range.
Definition: conversion.hpp:399
defer< bind_back, Fn, Ts... > bind_back
Definition: meta.hpp:994
Definition: take_last.hpp:36
Definition: take_last.hpp:47