| 1 | /* |
| 2 | Copyright 2019 Glen Joseph Fernandes |
| 3 | (glenjofe@gmail.com) |
| 4 | |
| 5 | Distributed under the Boost Software License, Version 1.0. |
| 6 | (http://www.boost.org/LICENSE_1_0.txt) |
| 7 | */ |
| 8 | #ifndef BOOST_CORE_FIRST_SCALAR_HPP |
| 9 | #define BOOST_CORE_FIRST_SCALAR_HPP |
| 10 | |
| 11 | #include <boost/config.hpp> |
| 12 | #include <cstddef> |
| 13 | |
| 14 | namespace boost { |
| 15 | namespace detail { |
| 16 | |
| 17 | template<class T> |
| 18 | struct make_scalar { |
| 19 | typedef T type; |
| 20 | }; |
| 21 | |
| 22 | template<class T, std::size_t N> |
| 23 | struct make_scalar<T[N]> { |
| 24 | typedef typename make_scalar<T>::type type; |
| 25 | }; |
| 26 | |
| 27 | } /* detail */ |
| 28 | |
| 29 | template<class T> |
| 30 | BOOST_CONSTEXPR inline T* |
| 31 | first_scalar(T* p) BOOST_NOEXCEPT |
| 32 | { |
| 33 | return p; |
| 34 | } |
| 35 | |
| 36 | template<class T, std::size_t N> |
| 37 | BOOST_CONSTEXPR inline typename detail::make_scalar<T>::type* |
| 38 | first_scalar(T (*p)[N]) BOOST_NOEXCEPT |
| 39 | { |
| 40 | return boost::first_scalar(&(*p)[0]); |
| 41 | } |
| 42 | |
| 43 | } /* boost */ |
| 44 | |
| 45 | #endif |
| 46 | |