tmp/tmpe_xd9xdw/{from.md → to.md}
RENAMED
|
@@ -0,0 +1,113 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
#### Class template `join_with_view` <a id="range.join.with.view">[[range.join.with.view]]</a>
|
| 2 |
+
|
| 3 |
+
``` cpp
|
| 4 |
+
namespace std::ranges {
|
| 5 |
+
template<class R, class P>
|
| 6 |
+
concept compatible-joinable-ranges = // exposition only
|
| 7 |
+
common_with<range_value_t<R>, range_value_t<P>> &&
|
| 8 |
+
common_reference_with<range_reference_t<R>, range_reference_t<P>> &&
|
| 9 |
+
common_reference_with<range_rvalue_reference_t<R>, range_rvalue_reference_t<P>>;
|
| 10 |
+
|
| 11 |
+
template<class R>
|
| 12 |
+
concept bidirectional-common = bidirectional_range<R> && common_range<R>; // exposition only
|
| 13 |
+
|
| 14 |
+
template<input_range V, forward_range Pattern>
|
| 15 |
+
requires view<V> && input_range<range_reference_t<V>>
|
| 16 |
+
&& view<Pattern>
|
| 17 |
+
&& compatible-joinable-ranges<range_reference_t<V>, Pattern>
|
| 18 |
+
class join_with_view : public view_interface<join_with_view<V, Pattern>> {
|
| 19 |
+
using InnerRng = range_reference_t<V>; // exposition only
|
| 20 |
+
|
| 21 |
+
V base_ = V(); // exposition only
|
| 22 |
+
non-propagating-cache<iterator_t<V>> outer_it_; // exposition only, present only
|
| 23 |
+
// when !forward_range<V>
|
| 24 |
+
non-propagating-cache<remove_cv_t<InnerRng>> inner_; // exposition only, present only
|
| 25 |
+
// if is_reference_v<InnerRng> is false
|
| 26 |
+
Pattern pattern_ = Pattern(); // exposition only
|
| 27 |
+
|
| 28 |
+
// [range.join.with.iterator], class template join_with_view::iterator
|
| 29 |
+
template<bool Const> struct iterator; // exposition only
|
| 30 |
+
|
| 31 |
+
// [range.join.with.sentinel], class template join_with_view::sentinel
|
| 32 |
+
template<bool Const> struct sentinel; // exposition only
|
| 33 |
+
|
| 34 |
+
public:
|
| 35 |
+
join_with_view()
|
| 36 |
+
requires default_initializable<V> && default_initializable<Pattern> = default;
|
| 37 |
+
|
| 38 |
+
constexpr explicit join_with_view(V base, Pattern pattern);
|
| 39 |
+
|
| 40 |
+
template<input_range R>
|
| 41 |
+
requires constructible_from<V, views::all_t<R>> &&
|
| 42 |
+
constructible_from<Pattern, single_view<range_value_t<InnerRng>>>
|
| 43 |
+
constexpr explicit join_with_view(R&& r, range_value_t<InnerRng> e);
|
| 44 |
+
|
| 45 |
+
constexpr V base() const & requires copy_constructible<V> { return base_; }
|
| 46 |
+
constexpr V base() && { return std::move(base_); }
|
| 47 |
+
|
| 48 |
+
constexpr auto begin() {
|
| 49 |
+
if constexpr (forward_range<V>) {
|
| 50 |
+
constexpr bool use_const =
|
| 51 |
+
simple-view<V> && is_reference_v<InnerRng> && simple-view<Pattern>;
|
| 52 |
+
return iterator<use_const>{*this, ranges::begin(base_)};
|
| 53 |
+
}
|
| 54 |
+
else {
|
| 55 |
+
outer_it_ = ranges::begin(base_);
|
| 56 |
+
return iterator<false>{*this};
|
| 57 |
+
}
|
| 58 |
+
}
|
| 59 |
+
constexpr auto begin() const
|
| 60 |
+
requires forward_range<const V> &&
|
| 61 |
+
forward_range<const Pattern> &&
|
| 62 |
+
is_reference_v<range_reference_t<const V>> &&
|
| 63 |
+
input_range<range_reference_t<const V>> {
|
| 64 |
+
return iterator<true>{*this, ranges::begin(base_)};
|
| 65 |
+
}
|
| 66 |
+
|
| 67 |
+
constexpr auto end() {
|
| 68 |
+
if constexpr (forward_range<V> &&
|
| 69 |
+
is_reference_v<InnerRng> && forward_range<InnerRng> &&
|
| 70 |
+
common_range<V> && common_range<InnerRng>)
|
| 71 |
+
return iterator<simple-view<V> && simple-view<Pattern>>{*this, ranges::end(base_)};
|
| 72 |
+
else
|
| 73 |
+
return sentinel<simple-view<V> && simple-view<Pattern>>{*this};
|
| 74 |
+
}
|
| 75 |
+
constexpr auto end() const
|
| 76 |
+
requires forward_range<const V> && forward_range<const Pattern> &&
|
| 77 |
+
is_reference_v<range_reference_t<const V>> &&
|
| 78 |
+
input_range<range_reference_t<const V>> {
|
| 79 |
+
using InnerConstRng = range_reference_t<const V>;
|
| 80 |
+
if constexpr (forward_range<InnerConstRng> &&
|
| 81 |
+
common_range<const V> && common_range<InnerConstRng>)
|
| 82 |
+
return iterator<true>{*this, ranges::end(base_)};
|
| 83 |
+
else
|
| 84 |
+
return sentinel<true>{*this};
|
| 85 |
+
}
|
| 86 |
+
};
|
| 87 |
+
|
| 88 |
+
template<class R, class P>
|
| 89 |
+
join_with_view(R&&, P&&) -> join_with_view<views::all_t<R>, views::all_t<P>>;
|
| 90 |
+
|
| 91 |
+
template<input_range R>
|
| 92 |
+
join_with_view(R&&, range_value_t<range_reference_t<R>>)
|
| 93 |
+
-> join_with_view<views::all_t<R>, single_view<range_value_t<range_reference_t<R>>>>;
|
| 94 |
+
}
|
| 95 |
+
```
|
| 96 |
+
|
| 97 |
+
``` cpp
|
| 98 |
+
constexpr explicit join_with_view(V base, Pattern pattern);
|
| 99 |
+
```
|
| 100 |
+
|
| 101 |
+
*Effects:* Initializes *base\_* with `std::move(base)` and *pattern\_*
|
| 102 |
+
with `std::move(pattern)`.
|
| 103 |
+
|
| 104 |
+
``` cpp
|
| 105 |
+
template<input_range R>
|
| 106 |
+
requires constructible_from<V, views::all_t<R>> &&
|
| 107 |
+
constructible_from<Pattern, single_view<range_value_t<InnerRng>>>
|
| 108 |
+
constexpr explicit join_with_view(R&& r, range_value_t<InnerRng> e);
|
| 109 |
+
```
|
| 110 |
+
|
| 111 |
+
*Effects:* Initializes *base\_* with `views::all(std::forward<R>(r))`
|
| 112 |
+
and *pattern\_* with `views::single(std::move(e))`.
|
| 113 |
+
|