How do I migrate legacy code to C++20?

Migrating legacy code to C++20 involves adopting new language features that enhance performance, safety, and maintainability. This guide provides insights on how to effectively transition your old codebase to leverage the capabilities of C++20.
C++20, legacy code, migration, code modernization, programming languages, software development 

#include <iostream>
#include <vector>

int main() {
    // Before C++20: using traditional loops
    std::vector<int> numbers = {1, 2, 3, 4, 5};
    for (size_t i = 0; i < numbers.size(); ++i) {
        std::cout << numbers[i] << " ";
    }

    // After C++20: using ranges and algorithms
    #include <ranges>
    auto output = numbers | std::views::transform([](int n) { return n * 2; });

    for (int n : output) {
        std::cout << n << " ";
    }
}

C++20 legacy code migration code modernization programming languages software development

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