67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
/// \file
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// Range v3 library
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//
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// Copyright Eric Niebler 2014
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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_ALGORITHM_FOR_EACH_HPP
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#define RANGES_V3_ALGORITHM_FOR_EACH_HPP
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#include <functional>
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#include <range/v3/range_fwd.hpp>
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#include <range/v3/begin_end.hpp>
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#include <range/v3/range_traits.hpp>
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#include <range/v3/range_concepts.hpp>
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#include <range/v3/algorithm/tagspec.hpp>
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#include <range/v3/utility/functional.hpp>
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#include <range/v3/utility/iterator_traits.hpp>
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#include <range/v3/utility/static_const.hpp>
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#include <range/v3/utility/tagged_pair.hpp>
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namespace ranges
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{
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inline namespace v3
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{
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/// \addtogroup group-algorithms
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/// @{
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struct for_each_fn
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{
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template<typename I, typename S, typename F, typename P = ident,
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CONCEPT_REQUIRES_(InputIterator<I>() && Sentinel<S, I>() &&
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IndirectInvocable<F, projected<I, P>>())>
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tagged_pair<tag::in(I), tag::fun(F)>
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operator()(I begin, S end, F fun, P proj = P{}) const
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{
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for(; begin != end; ++begin)
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{
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invoke(fun, invoke(proj, *begin));
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}
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return {detail::move(begin), detail::move(fun)};
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}
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template<typename Rng, typename F, typename P = ident,
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CONCEPT_REQUIRES_(InputRange<Rng>() &&
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IndirectInvocable<F, projected<iterator_t<Rng>, P>>())>
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tagged_pair<tag::in(safe_iterator_t<Rng>), tag::fun(F)>
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operator()(Rng &&rng, F fun, P proj = P{}) const
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{
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return {(*this)(begin(rng), end(rng), ref(fun), detail::move(proj)).in(),
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detail::move(fun)};
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}
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};
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/// \sa `for_each_fn`
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/// \ingroup group-algorithms
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RANGES_INLINE_VARIABLE(with_braced_init_args<for_each_fn>, for_each)
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/// @}
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} // namespace v3
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} // namespace ranges
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#endif // include guard
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