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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_DROP_WHILE_HPP
#define RANGES_V3_ACTION_DROP_WHILE_HPP
#include <range/v3/range_fwd.hpp>
#include <range/v3/action/action.hpp>
#include <range/v3/action/erase.hpp>
#include <range/v3/algorithm/find_if_not.hpp>
#include <range/v3/functional/bind_back.hpp>
#include <range/v3/iterator/concepts.hpp>
#include <range/v3/iterator/traits.hpp>
#include <range/v3/utility/static_const.hpp>
#include <range/v3/detail/prologue.hpp>
namespace ranges
{
/// \addtogroup group-actions
/// @{
namespace actions
{
struct drop_while_fn
{
template(typename Fun)(
requires (!range<Fun>))
constexpr auto operator()(Fun fun) const
{
return make_action_closure(bind_back(drop_while_fn{}, std::move(fun)));
}
template(typename Rng, typename Fun)(
requires forward_range<Rng> AND
indirect_unary_predicate<Fun, iterator_t<Rng>> AND
erasable_range<Rng &, iterator_t<Rng>, iterator_t<Rng>>)
Rng operator()(Rng && rng, Fun fun) const
{
ranges::actions::erase(
rng, begin(rng), find_if_not(begin(rng), end(rng), std::move(fun)));
return static_cast<Rng &&>(rng);
}
};
/// \relates actions::drop_while_fn
RANGES_INLINE_VARIABLE(drop_while_fn, drop_while)
} // namespace actions
/// @}
} // namespace ranges
#include <range/v3/detail/epilogue.hpp>
#endif
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