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C++ Brain Teasers: Exercise Your Mind

Discussion: Who’s Up First?

Understand the order in which C++ initializes and destroys class members, regardless of their order in constructors. Explore how this impacts dependencies between objects and can lead to undefined behavior if not properly managed. Learn best practices for writing consistent and portable code by aligning member declarations with initializer lists and enabling compiler warnings across multiple compilers.

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C++ 17
#include <iostream>
struct Resource
{
    Resource()
    {
        std::cout << "Resource constructed\n";
    }
};
struct Consumer
{
    Consumer(const Resource &resource)
    {
        std::cout << "Consumer constructed\n";
    }
};
struct Job
{
    Job() : resource_{}, consumer_{resource_} {}
    Consumer consumer_;
    Resource resource_;
};
int main() 
{
    Job job;
}
...