How do I avoid exceptions and handle errors std::variant in C++?

In C++, handling errors with `std::variant` can be accomplished without throwing exceptions by using alternatives like `std::visit` or checking the currently held type. Below is an example illustrating these techniques in action.


    #include 
    #include 
    
    // Define a variant type
    using VariantType = std::variant;

    void processVariant(const VariantType& variant) {
        // Using std::visit to process the variant
        std::visit([](auto&& arg) {
            using T = std::decay_t;
            if constexpr (std::is_same_v) {
                std::cout << "Received an integer: " << arg << std::endl;
            } else if constexpr (std::is_same_v) {
                std::cout << "Received a string: " << arg << std::endl;
            }
        }, variant);
    }

    int main() {
        VariantType v1 = 42;
        VariantType v2 = std::string("Hello, World!");

        processVariant(v1); // Output: Received an integer: 42
        processVariant(v2); // Output: Received a string: Hello, World!

        return 0;
    }

How do I avoid exceptions and handle errors std::variant in C++?

Popular Topics

Recent Languages

How do I avoid exceptions and handle errors std::variant in C++?

Related Questions

Popular Topics

Recent Languages