66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
/// \file
|
|
// Range v3 library
|
|
//
|
|
// Copyright Eric Niebler 2014
|
|
//
|
|
// 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_ALGORITHM_GENERATE_HPP
|
|
#define RANGES_V3_ALGORITHM_GENERATE_HPP
|
|
|
|
#include <utility>
|
|
#include <range/v3/range_fwd.hpp>
|
|
#include <range/v3/begin_end.hpp>
|
|
#include <range/v3/range_concepts.hpp>
|
|
#include <range/v3/range_traits.hpp>
|
|
#include <range/v3/utility/iterator_concepts.hpp>
|
|
#include <range/v3/utility/static_const.hpp>
|
|
#include <range/v3/utility/tagged_pair.hpp>
|
|
#include <range/v3/algorithm/tagspec.hpp>
|
|
|
|
namespace ranges
|
|
{
|
|
inline namespace v3
|
|
{
|
|
/// \addtogroup group-algorithms
|
|
/// @{
|
|
struct generate_fn
|
|
{
|
|
template<typename O, typename S, typename F,
|
|
CONCEPT_REQUIRES_(Invocable<F&>() &&
|
|
OutputIterator<O, result_of_t<F&()>>() &&
|
|
Sentinel<S, O>())>
|
|
tagged_pair<tag::out(O), tag::fun(F)>
|
|
operator()(O begin, S end, F fun) const
|
|
{
|
|
for(; begin != end; ++begin)
|
|
*begin = invoke(fun);
|
|
return {detail::move(begin), detail::move(fun)};
|
|
}
|
|
|
|
template<typename Rng, typename F,
|
|
typename O = iterator_t<Rng>,
|
|
CONCEPT_REQUIRES_(Invocable<F&>() &&
|
|
OutputRange<Rng, result_of_t<F&()>>())>
|
|
tagged_pair<tag::out(safe_iterator_t<Rng>), tag::fun(F)>
|
|
operator()(Rng &&rng, F fun) const
|
|
{
|
|
return {(*this)(begin(rng), end(rng), ref(fun)).out(),
|
|
detail::move(fun)};
|
|
}
|
|
};
|
|
|
|
/// \sa `generate_fn`
|
|
/// \ingroup group-algorithms
|
|
RANGES_INLINE_VARIABLE(with_braced_init_args<generate_fn>, generate)
|
|
/// @}
|
|
} // namespace v3
|
|
} // namespace ranges
|
|
|
|
#endif // include guard
|