Sprout/sprout/bit/rstbitsle.hpp
2015-01-10 19:13:57 +09:00

28 lines
889 B
C++

/*=============================================================================
Copyright (c) 2011-2015 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under 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)
=============================================================================*/
#ifndef SPROUT_BIT_SRSTBITSLE_HPP
#define SPROUT_BIT_SRSTBITSLE_HPP
#include <type_traits>
#include <sprout/config.hpp>
namespace sprout {
//
// rstbitsle
//
template<typename Integral>
inline SPROUT_CONSTEXPR typename std::enable_if<
std::is_integral<Integral>::value,
Integral
>::type
rstbitsle(Integral x, int b) SPROUT_NOEXCEPT {
return x & ~((Integral(1) << (b + 1)) - 1);
}
} // namespace sprout
#endif // #ifndef SPROUT_BIT_SRSTBITSLE_HPP