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/// \file
// Range v3 library
//
// Copyright Eric Niebler 2014-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_ALGORITHM_GENERATE_HPP
#define RANGES_V3_ALGORITHM_GENERATE_HPP
#include <utility>
#include <range/v3/range_fwd.hpp>
#include <range/v3/algorithm/result_types.hpp>
#include <range/v3/functional/invoke.hpp>
#include <range/v3/functional/reference_wrapper.hpp>
#include <range/v3/iterator/concepts.hpp>
#include <range/v3/range/access.hpp>
#include <range/v3/range/concepts.hpp>
#include <range/v3/range/dangling.hpp>
#include <range/v3/range/traits.hpp>
#include <range/v3/utility/static_const.hpp>
#include <range/v3/detail/prologue.hpp>
namespace ranges
{
/// \addtogroup group-algorithms
/// @{
template<typename O, typename F>
using generate_result = detail::out_fun_result<O, F>;
RANGES_FUNC_BEGIN(generate)
/// \brief function template \c generate_n
template(typename O, typename S, typename F)(
requires invocable<F &> AND output_iterator<O, invoke_result_t<F &>> AND
sentinel_for<S, O>)
constexpr generate_result<O, F> RANGES_FUNC(generate)(O first, S last, F fun) //
{
for(; first != last; ++first)
*first = invoke(fun);
return {detail::move(first), detail::move(fun)};
}
/// \overload
template(typename Rng, typename F)(
requires invocable<F &> AND output_range<Rng, invoke_result_t<F &>>)
constexpr generate_result<borrowed_iterator_t<Rng>, F> //
RANGES_FUNC(generate)(Rng && rng, F fun)
{
return {(*this)(begin(rng), end(rng), ref(fun)).out, detail::move(fun)};
}
RANGES_FUNC_END(generate)
namespace cpp20
{
using ranges::generate;
using ranges::generate_result;
} // namespace cpp20
/// @}
} // namespace ranges
#include <range/v3/detail/epilogue.hpp>
#endif
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