example2_template_specialization.cpp

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
#include <type_traits>
#include <iostream>
#include <vector>

template <typename T, typename Enable = void>
class Container {
public:
    void add(const T& value) {
        std::cout << "General container" << std::endl;
    }
};

template <typename T>
class Container<T, typename std::enable_if<std::is_arithmetic<T>::value>::type> {
public:
    void add(const T& value) {
        std::cout << "Arithmetic container" << std::endl;
    }
};

int main() {
    Container<std::string> c1;
    c1.add("Hello");

    Container<int> c2;
    c2.add(42);
}