CMake/Utilities/std/cmext/algorithm

// -*-c++-*-
// vim: set ft=cpp:

/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#ifndef cmext_algorithm
#define cmext_algorithm

#include <algorithm>
#include <iterator>
#include <memory>
#include <utility>
#include <vector>

#include <cm/type_traits>
#include <cmext/iterator>

namespace cm {

template <typename T>
void append(std::vector<std::unique_ptr<T>>& v,
            std::vector<std::unique_ptr<T>>&& r)
{
  std::transform(r.begin(), r.end(), std::back_inserter(v),
                 [](std::unique_ptr<T>& item) { return std::move(item); });
  r.clear();
}

template <typename T>
void append(std::vector<T*>& v, std::vector<std::unique_ptr<T>> const& r)
{
  std::transform(r.begin(), r.end(), std::back_inserter(v),
                 [](const std::unique_ptr<T>& item) { return item.get(); });
}

template <typename T, typename InputIt,
          cm::enable_if_t<cm::is_input_iterator<InputIt>::value, int> = 0>
void append(std::vector<T>& v, InputIt first, InputIt last)
{
  v.insert(v.end(), first, last);
}

template <typename T, typename Range,
          cm::enable_if_t<cm::is_input_range<Range>::value, int> = 0>
void append(std::vector<T>& v, Range const& r)
{
  v.insert(v.end(), r.begin(), r.end());
}

} // namespace cm

#endif