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unique.hpp
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1
2// Range v3 library
3//
4// Copyright Eric Niebler 2013-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_ACTION_UNIQUE_HPP
15#define RANGES_V3_ACTION_UNIQUE_HPP
16
18
27#include <range/v3/utility/static_const.hpp>
28
29#include <range/v3/detail/prologue.hpp>
30
31namespace ranges
32{
35 namespace actions
36 {
37 struct unique_fn
38 {
39 template(typename C, typename P = identity)(
40 requires (!range<C>))
41 constexpr auto operator()(C pred, P proj = P{}) const
42 {
43 return make_action_closure(
44 bind_back(unique_fn{}, std::move(pred), std::move(proj)));
45 }
46
47 template(typename Rng, typename C = equal_to, typename P = identity)(
48 requires forward_range<Rng> AND
49 erasable_range<Rng &, iterator_t<Rng>, sentinel_t<Rng>> AND
51 Rng operator()(Rng && rng, C pred = C{}, P proj = P{}) const
52 {
53 auto it = ranges::unique(rng, std::move(pred), std::move(proj));
54 ranges::erase(rng, it, end(rng));
55 return static_cast<Rng &&>(rng);
56 }
57 };
58
61 RANGES_INLINE_VARIABLE(action_closure<unique_fn>, unique)
62 } // namespace actions
64} // namespace ranges
65
66#include <range/v3/detail/epilogue.hpp>
67
68#endif
The erasable_range concept.
The forward_range concept.
The range concept.
The sortable concept.
decltype(begin(declval(Rng &))) iterator_t
Definition access.hpp:698
Definition action.hpp:141
Definition unique.hpp:38
Definition comparisons.hpp:28
Definition identity.hpp:25