Test std::map insert() vs emplace()

#include <iostream>
#include <map>

using namespace std;

void PrintInsertResult(const pair<map<int, string>::iterator, bool> & result) {
    auto [iter, inserted] = result;
            auto [key, value] = (*iter);
    if (inserted) {
        cout << "Successfully inserted (" << key << ", " << value
             << ") into map" << endl;
    } else {
        cout << "Value was not inserted, existing value found: ("
             << key << ", " << value << ")" << endl;
    }
}

//------------------------------------------------------------------------------
int main()
{
    map<int, string> numbers;

    cout << "insert(1, one)" << endl;
    pair<map<int, string>::iterator, bool> first_inserted =
            numbers.insert({1, "one"});
    PrintInsertResult(first_inserted);

    cout << "insert(1, uno)" << endl;
    auto duplicate_first_inserted = numbers.insert({1, "uno"});
    PrintInsertResult(duplicate_first_inserted);

    cout << "emplace(1, uno)" << endl;
    auto duplicate_first_emplaced = numbers.emplace(1, "uno");
    PrintInsertResult(duplicate_first_emplaced);

    return 0;
}