inserter.md

inserter

• iterator[meta header]
• std[meta namespace]
• function template[meta id-type]

namespace std {
  template <class Container>
  insert_iterator<Container>
    inserter(Container& x, typename Container::iterator i);   // (1) C++03

  template <class Container>
  constexpr insert_iterator<Container>
    inserter(Container& x, ranges::iterator_t<Container> i);  // (1) C++20
}

• insert_iterator[link insert_iterator.md]
• ranges::iterator_t[link /reference/ranges/iterator_t.md]

概要

insert_iteratorのヘルパ関数

戻り値

insert_iterator<Container>(x, i)

• insert_iterator[link insert_iterator.md]

例

#include <iostream>
#include <set>
#include <iterator>
#include <algorithm>

int main()
{
  std::set<int> src = {1, 2, 3};
  std::set<int> dest;

  // srcの要素をdestに挿入しながらコピー
  std::copy(src.begin(), src.end(), std::inserter(dest, dest.end()));

  for (int x : dest) {
    std::cout << x << std::endl;
  }
}

• std::front_inserter[color ff0000]
• src.begin()[link /reference/set/set/begin.md]
• src.end()[link /reference/set/set/end.md]
• dest.end()[link /reference/set/set/end.md]

出力

1
2
3

参照

• P1032R1 Misc constexpr bits
• P0896R4 The One Ranges Proposal (was Merging the Ranges TS)