How can I store a lambda expression as a field of a class in C++11?

Question

I\'d like to create a class where the client can store a lambda expression like []() -> void {} as a field of the class, but I can\'t figure out how to do so

Answer 1

The only way I can think of to store a lambda in a class is to use a template with a helper make_ function:

#include 
#include 

template
class MyClass {
    Lambda _t;
public:
    MyClass(Lambda &&t) : _t(std::forward(t)) {
        _t();
    }
};

template
MyClass make_myclass(Lambda &&t) {
    return { std::forward(t) };
}

int main() {
    make_myclass([] {
        printf("hi");
    });
}