The All-in-One Guide to C++20/

...

/

Solution: Manage the Implicit Conversion

Solution: Manage the Implicit Conversion

The solution to the challenge, 'Exercise: Manage the Implicit Conversion'.

We'll cover the following...

Solution

C++
#include <iostream>
#include <type_traits>
#include <typeinfo>
struct MyBool {
    template <typename T>
    explicit(!std::is_same<T, bool>::value) MyBool(T t) {
        std::cout << typeid(t).name() << '\n';
    }
};
void needBool(MyBool b){}
int main() {
    MyBool myBool1(true);
    MyBool myBool2 = false;
    needBool(myBool1);
    needBool(true);
    // needBool(5);
    // needBool("true");
}

The explicit (!std::is_same<T, bool>::value) expression guarantees that MyBool can only be ...