gen_lambda.cpp

#include <iostream>

using namespace std;

template<typename Func>
void call_f(Func f) {
    f();
}

void hello () {
    cout << "hello wrold" << endl;
}

int main() {
    // lambda expressions
    auto l_hello = []{cout << "hello world" << endl;};
    cout << "1 : ";
    l_hello();

    // callback
    cout << "2 : ";
    call_f(hello);
    cout << "3 : ";
    call_f(l_hello);

    // generic lambda expressions
    auto plus = [](auto a, auto b) {
        return a + b;
    };

    cout << "4 : ";
    cout << plus(1, 2) << endl;
}