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/// \file
// Range v3 library
//
// Copyright Eric Niebler 2013-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_ACTION_SPLIT_WHEN_HPP
#define RANGES_V3_ACTION_SPLIT_WHEN_HPP
#include <vector>
#include <meta/meta.hpp>
#include <range/v3/range_fwd.hpp>
#include <range/v3/action/action.hpp>
#include <range/v3/action/concepts.hpp>
#include <range/v3/functional/bind_back.hpp>
#include <range/v3/functional/invoke.hpp>
#include <range/v3/iterator/concepts.hpp>
#include <range/v3/iterator/traits.hpp>
#include <range/v3/range/conversion.hpp>
#include <range/v3/utility/static_const.hpp>
#include <range/v3/view/split_when.hpp>
#include <range/v3/detail/prologue.hpp>
namespace ranges
{
/// \addtogroup group-actions
/// @{
namespace actions
{
struct split_when_fn
{
template<typename Rng>
using split_value_t =
meta::if_c<(bool)ranges::container<Rng>, //
uncvref_t<Rng>, std::vector<range_value_t<Rng>>>;
template<typename Fun>
constexpr auto operator()(Fun fun) const
{
return make_action_closure(
bind_back(split_when_fn{}, static_cast<Fun &&>(fun)));
}
// BUGBUG something is not right with the actions. It should be possible
// to move a container into a split and have elements moved into the result.
template(typename Rng, typename Fun)(
requires forward_range<Rng> AND
invocable<Fun &, iterator_t<Rng>, sentinel_t<Rng>> AND
invocable<Fun &, iterator_t<Rng>, iterator_t<Rng>> AND
copy_constructible<Fun> AND
convertible_to<invoke_result_t<Fun &, iterator_t<Rng>,
sentinel_t<Rng>>,
std::pair<bool, iterator_t<Rng>>>)
std::vector<split_value_t<Rng>> operator()(Rng && rng, Fun fun) const
{
return views::split_when(rng, std::move(fun)) |
to<std::vector<split_value_t<Rng>>>();
}
template(typename Rng, typename Fun)(
requires forward_range<Rng> AND
predicate<Fun const &, range_reference_t<Rng>> AND
copy_constructible<Fun>)
std::vector<split_value_t<Rng>> operator()(Rng && rng, Fun fun) const
{
return views::split_when(rng, std::move(fun)) |
to<std::vector<split_value_t<Rng>>>();
}
};
/// \relates actions::split_when_fn
RANGES_INLINE_VARIABLE(split_when_fn, split_when)
} // namespace actions
/// @}
} // namespace ranges
#include <range/v3/detail/epilogue.hpp>
#endif
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