ceph/src/boost/boost/core/first_scalar.hpp

   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