Edit: /usr/include/boost/hana/repeat.hpp (1793B)
/*!
@file
Defines `boost::hana::repeat`.
@copyright Louis Dionne 2013-2017
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_HANA_REPEAT_HPP
#define BOOST_HANA_REPEAT_HPP
#include
#include
#include
#include
#include
#include
BOOST_HANA_NAMESPACE_BEGIN
template
struct repeat_impl> : default_ {
template
static constexpr void repeat_helper(F&& f, std::index_sequence) {
using Swallow = std::size_t[];
(void)Swallow{0, ((void)f(), i)...};
}
template
static constexpr auto apply(N const&, F&& f) {
static_assert(N::value >= 0, "hana::repeat(n, f) requires 'n' to be non-negative");
constexpr std::size_t n = N::value;
repeat_helper(static_cast(f), std::make_index_sequence{});
}
};
//! @cond
template
constexpr void repeat_t::operator()(N const& n, F&& f) const {
using I = typename hana::tag_of::type;
using Repeat = BOOST_HANA_DISPATCH_IF(repeat_impl,
hana::IntegralConstant::value
);
#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
static_assert(hana::IntegralConstant::value,
"hana::repeat(n, f) requires 'n' to be an IntegralConstant");
#endif
return Repeat::apply(n, static_cast(f));
}
//! @endcond
BOOST_HANA_NAMESPACE_END
#endif // !BOOST_HANA_REPEAT_HPP