Movatterモバイル変換

[0]ホーム
URL:

cppreference.com
Namespaces
Variants
    Actions

      std::back_inserter

      From cppreference.com
      <cpp‎ |iterator
       
       
      Iterator library
      Iterator concepts
      Iterator primitives
      Algorithm concepts and utilities
      Indirect callable concepts
      Common algorithm requirements
      (C++20)
      (C++20)
      (C++20)
      Utilities
      (C++20)
      Iterator adaptors
      Range access
      (C++11)(C++14)
      (C++14)(C++14)  
      (C++11)(C++14)
      (C++14)(C++14)  
      (C++17)(C++20)
      (C++17)
      (C++17)
       
      Defined in header<iterator>
      template<class Container>
      std::back_insert_iterator<Container> back_inserter( Container& c);
      		(constexpr since C++20)

      back_inserter is a convenience function template that constructs astd::back_insert_iterator for the containerc with the type deduced from the type of the argument.

      Contents

      [edit]Parameters

      c - container that supports apush_back operation

      [edit]Return value

      Astd::back_insert_iterator which can be used to add elements to the end of the containerc.

      [edit]Possible implementation

      template<class Container>std::back_insert_iterator<Container> back_inserter(Container& c){returnstd::back_insert_iterator<Container>(c);}

      [edit]Example

      Run this code
      #include <algorithm>#include <iostream>#include <iterator>#include <vector> int main(){std::vector<int> v{1,2,3,4,5,6,7,8,9,10};std::fill_n(std::back_inserter(v),3,-1);for(int n: v)std::cout<< n<<' ';std::cout<<'\n';}

      Output:

      1 2 3 4 5 6 7 8 9 10 -1 -1 -1

      [edit]See also

      iterator adaptor for insertion at the end of a container
      (class template)[edit]
      creates astd::front_insert_iterator of type inferred from the argument
      (function template)[edit]
      creates astd::insert_iterator of type inferred from the argument
      (function template)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/iterator/back_inserter&oldid=167057"
      [8]ページ先頭
      ©2009-2025 Movatter.jp