list::insert
Inserts an element or a number of elements or a range of elements into a list at a specified position.
iterator insert(
iterator Where,
const Type& Val
);
iterator insert(
iterator Where,
Type&& Val
);
void insert(
iterator Where,
size_type Count,
const Type& Val
);
iterator insert(
iterator Where,
initializer_list<Type> IList
);
template<class InputIterator>
void insert(
iterator Where,
InputIterator First,
InputIterator Last
);
Parameters
Parameter |
Description |
Where |
The position in the target list where the first element is inserted. |
Val |
The value of the element being inserted into the list. |
Count |
The number of elements being inserted into the list. |
First |
The position of the first element in the range of elements in the argument list to be copied. |
Last |
The position of the first element beyond the range of elements in the argument list to be copied. |
Return Value
The first two insert functions return an iterator that points to the position where the new element was inserted into the list.
Example
// list_class_insert.cpp
// compile with: /EHsc
#include <list>
#include <iostream>
#include <string>
int main()
{
using namespace std;
list <int> c1, c2;
list <int>::iterator Iter;
c1.push_back(10);
c1.push_back(20);
c1.push_back(30);
c2.push_back(40);
c2.push_back(50);
c2.push_back(60);
cout << "c1 =";
for (auto c : c1)
cout << " " << c;
cout << endl;
Iter = c1.begin();
Iter++;
c1.insert(Iter, 100);
cout << "c1 =";
for (auto c : c1)
cout << " " << c;
cout << endl;
Iter = c1.begin();
Iter++;
Iter++;
c1.insert(Iter, 2, 200);
cout << "c1 =";
for(auto c : c1)
cout << " " << c;
cout << endl;
c1.insert(++c1.begin(), c2.begin(), --c2.end());
cout << "c1 =";
for (auto c : c1)
cout << " " << c;
cout << endl;
// initialize a list of strings by moving
list < string > c3;
string str("a");
c3.insert(c3.begin(), move(str));
cout << "Moved first element: " << c3.front() << endl;
// Assign with an initializer_list
list <int> c4{ {1, 2, 3, 4} };
c4.insert(c4.begin(), { 5, 6, 7, 8 });
cout << "c4 =";
for (auto c : c4)
cout << " " << c;
cout << endl;
}
Output
c1 = 10 20 30c1 = 10 100 20 30c1 = 10 100 200 200 20 30c1 = 10 40 50 100 200 200 20 30Moved first element: ac4 = 5 6 7 8 1 2 3 4
Requirements
Header: <list>
Namespace: std