#include <iostream>
#include <string>

class Test
{
    std::string value;

public:
    Test(const Test & test): // copy c-tor
        value(test.value)
    {
        std::cout << "Test::Test(Test)";
    }

    Test(std::string value): //c-tor from value
        value(value)
    {
        std::cout << "Test::Test(string)";
    }
};

Test genTest() // to create temporary
{
    Test test = Test("string");
    return test;
}

class Container
{
    Test test;
public:
    Container():
    test(genTest()) // initialize from temporary
    {
    }
};

int main()
{
    Container container;
    return 0;
}

//Output:
//Test::Test(string)
//Copy constructor is unused