How do I pattern match (std::visit) std::tuple in C++?

In C++, pattern matching using `std::visit` and `std::tuple` can make working with variants more manageable. This provides a way to handle multiple types cleanly and efficiently.

std::visit, std::tuple, C++, pattern matching, variants, type safety

This content demonstrates how to use std::visit along with std::tuple in C++ for effective pattern matching across different types.

#include <iostream> #include <variant> #include <tuple> #include <string> // Define a visitor that handles the different types in a variant struct Visitor { void operator()(int value) const { std::cout << "Integer: " << value << std::endl; } void operator()(const std::string &value) const { std::cout << "String: " << value << std::endl; } }; int main() { // Create a tuple of variants auto myTuple = std::make_tuple(std::variant<int, std::string>(42), std::variant<int, std::string>("Hello")); // Visit and display each element of the tuple std::apply([](auto&... args) { (std::visit(Visitor{}, args), ...); }, myTuple); return 0; }

std::visit std::tuple C++ pattern matching variants type safety

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