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66 lines
1.9 KiB
C++
66 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_ACTION_TRANSFORM_HPP
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#define RANGES_V3_ACTION_TRANSFORM_HPP
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#include <range/v3/range_fwd.hpp>
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#include <range/v3/action/action.hpp>
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#include <range/v3/algorithm/transform.hpp>
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#include <range/v3/functional/bind_back.hpp>
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#include <range/v3/functional/identity.hpp>
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#include <range/v3/iterator/concepts.hpp>
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#include <range/v3/iterator/traits.hpp>
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#include <range/v3/utility/static_const.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-actions
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/// @{
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namespace actions
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{
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struct transform_fn
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{
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template(typename F, typename P = identity)(
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requires (!range<F>))
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constexpr auto operator()(F fun, P proj = P{}) const
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{
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return make_action_closure(
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bind_back(transform_fn{}, std::move(fun), std::move(proj)));
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}
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template(typename Rng, typename F, typename P = identity)(
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requires input_range<Rng> AND copy_constructible<F> AND
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indirectly_writable<
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iterator_t<Rng>,
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indirect_result_t<F &, projected<iterator_t<Rng>, P>>>)
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Rng operator()(Rng && rng, F fun, P proj = P{}) const
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{
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ranges::transform(rng, begin(rng), std::move(fun), std::move(proj));
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return static_cast<Rng &&>(rng);
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}
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};
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/// \relates actions::transform_fn
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RANGES_INLINE_VARIABLE(transform_fn, transform)
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} // namespace actions
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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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