backports.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NDN_UTIL_BACKPORTS_HPP
#define NDN_UTIL_BACKPORTS_HPP

#include "../common.hpp"

#ifndef NDN_CXX_HAVE_STD_TO_STRING
#include <boost/lexical_cast.hpp>
#endif

#include <algorithm>

namespace ndn {

#if __cpp_lib_make_unique
using std::make_unique;
#else
template<typename T, typename ...Args>
inline unique_ptr<T>
make_unique(Args&&... args)
{
  return unique_ptr<T>(new T(std::forward<Args>(args)...));
}
#endif // __cpp_lib_make_unique

#ifdef NDN_CXX_HAVE_STD_TO_STRING
using std::to_string;
#else
template<typename V>
inline std::string
to_string(const V& v)
{
  return boost::lexical_cast<std::string>(v);
}
#endif // NDN_CXX_HAVE_STD_TO_STRING

#if __cpp_lib_clamp >= 201603
using std::clamp;
#else
template<typename T, typename Compare>
constexpr const T&
clamp(const T& v, const T& lo, const T& hi, Compare comp)
{
  return comp(v, lo) ? lo : comp(hi, v) ? hi : v;
}

template<typename T>
constexpr const T&
clamp(const T& v, const T& lo, const T& hi)
{
  return (v < lo) ? lo : (hi < v) ? hi : v;
}
#endif // __cpp_lib_clamp

} // namespace ndn

#include "backports-optional.hpp"

#endif // NDN_UTIL_BACKPORTS_HPP