std::variant not holding value after assignment in C++20 with std::visit
I need some guidance on I've searched everywhere and can't find a clear answer. I'm working with an scenario where `std::variant` seems to lose its value after assigning a new type and subsequently trying to access it using `std::visit`. I'm using C++20, and I have a `std::variant<int, std::string>` that I want to switch between an integer and a string. Here's a simplified version of my code: ```cpp #include <iostream> #include <variant> #include <string> int main() { std::variant<int, std::string> var; var = 42; // Assign an integer std::visit([](auto&& arg) { std::cout << "Value: " << arg << '\n'; }, var); var = "Hello, World!"; // Now assign a string // This is where I run into an scenario std::visit([](auto&& arg) { std::cout << "Value: " << arg << '\n'; }, var); // Trying to access the integer again std::cout << "Trying to access int: " << std::get<int>(var) << '\n'; // This line throws std::bad_variant_access } ``` After the assignment of the string, when I try to access the integer value using `std::get<int>(var)`, I get a `std::bad_variant_access` behavior. I've double-checked, and the variant correctly holds a string at that point, but I still expected to retrieve the integer before the string assignment. Is this the intended behavior of `std::variant`, or am I missing something fundamental here about its usage? I want to ensure that I am following best practices when working with `std::variant` in C++20, especially with type safety in mind. Any insights would be greatly appreciated! I'm working on a service that needs to handle this. Any pointers in the right direction?