data.hpp

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/*
Copyright 2023 Glen Joseph Fernandes
(glenjofe@gmail.com)
 
Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_CORE_DATA_HPP
#define BOOST_CORE_DATA_HPP
 
#include <iterator>
 
// Note: MSVC doesn't define __cpp_lib_nonmember_container_access but supports
// the feature even in C++14 mode
#if (defined(__cpp_lib_nonmember_container_access) &&                          \
     (__cpp_lib_nonmember_container_access >= 201411l)) ||                     \
    (defined(_MSC_VER) && (_MSC_VER >= 1900))
 
namespace boost {
using std::data;
} // namespace boost
 
#else // (defined(__cpp_lib_nonmember_container_access) ...
 
#include <cstddef>
#include <initializer_list>
 
namespace boost {
 
template <class C>
inline constexpr auto data(C &c) noexcept(noexcept(c.data()))
    -> decltype(c.data()) {
  return c.data();
}
 
template <class C>
inline constexpr auto data(const C &c) noexcept(noexcept(c.data()))
    -> decltype(c.data()) {
  return c.data();
}
 
template <class T, std::size_t N> inline constexpr T *data(T (&a)[N]) noexcept {
  return a;
}
 
template <class T>
inline constexpr const T *data(std::initializer_list<T> l) noexcept {
  return l.begin();
}
 
} // namespace boost
 
#endif // (defined(__cpp_lib_nonmember_container_access) ...
 
#endif