mirror of https://github.com/axmolengine/axmol.git
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
/// \file
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// Range v3 library
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//
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// Copyright Eric Niebler 2013-present
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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#ifndef RANGES_V3_VIEW_UNIQUE_HPP
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#define RANGES_V3_VIEW_UNIQUE_HPP
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#include <utility>
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#include <meta/meta.hpp>
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#include <range/v3/range_fwd.hpp>
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#include <range/v3/functional/bind_back.hpp>
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#include <range/v3/functional/not_fn.hpp>
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#include <range/v3/utility/static_const.hpp>
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#include <range/v3/view/adjacent_filter.hpp>
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#include <range/v3/view/all.hpp>
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#include <range/v3/view/view.hpp>
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#include <range/v3/detail/prologue.hpp>
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namespace ranges
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{
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/// \addtogroup group-views
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/// @{
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namespace views
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{
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struct unique_base_fn
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{
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template(typename Rng, typename C = equal_to)(
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requires viewable_range<Rng> AND forward_range<Rng> AND
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indirect_relation<C, iterator_t<Rng>>)
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constexpr adjacent_filter_view<all_t<Rng>, logical_negate<C>> //
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operator()(Rng && rng, C pred = {}) const
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{
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return {all(static_cast<Rng &&>(rng)), not_fn(pred)};
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}
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};
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struct unique_fn : unique_base_fn
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{
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using unique_base_fn::operator();
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template(typename C)(
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requires (!range<C>))
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constexpr auto operator()(C && pred) const
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{
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return make_view_closure(
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bind_back(unique_base_fn{}, static_cast<C &&>(pred)));
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}
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};
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/// \relates unique_fn
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/// \ingroup group-views
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RANGES_INLINE_VARIABLE(view_closure<unique_fn>, unique)
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} // namespace views
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/// @}
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} // namespace ranges
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#include <range/v3/detail/epilogue.hpp>
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#endif
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