Consider the program z.cpp:
#include <cstdlib>
#include <iostream>
#include <vector>
#include <deque>
#include <list>
#include <map>
#include <utility>
using namespace std;
int main()
{
typedef pair<const int, const int> p_type;
vector<p_type> v;
//v.insert(v.begin(), make_pair(0, 2));
list<p_type> l;
l.insert(l.begin(), make_pair(0, 2));
deque<p_type> d;
//d.insert(d.begin(), make_pair(0, 2));
map<const int, const int> s;
s.insert(make_pair(0, 2));
return EXIT_SUCCESS;
}
I am using
g++ -std=c++98 -pedantic -Wall -Wextra z.cpp
Here if I remove the two comments(one each on vector insert and
deque insert), I get compilation error. But for list, there is no
compilation error for a similar insert. Why does compilation error
occur, only for vector and deque and not for list and map ?
Standard containers require that the value type is assignable. When