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For C++ developers aiming to write modern code, the book “Programming with C++20” by Andreas Fertig is a must-read. It covers all the major C++20 features, helping you apply them effectively in your projects.
Order your copy here:
- Print: https://amzn.to/4hZLrc1
- E-book: https://fertig.to/bpwcpp20
You Should Know:
To get started with C++20, here are some practical examples and commands to help you explore its new features:
1. Modules:
C++20 introduces modules to replace traditional header files.
// Create a module
module;
export module my_module;
export int add(int a, int b) {
return a + b;
}
2. Ranges:
Simplify working with sequences using the `` library.
#include <ranges>
#include <vector>
#include <iostream>
int main() {
std::vector<int> nums = {1, 2, 3, 4, 5};
auto even = nums | std::views::filter([](int n) { return n % 2 == 0; });
for (int n : even) {
std::cout << n << " ";
}
}
3. Coroutines:
Use coroutines for asynchronous programming.
#include <coroutine>
#include <iostream>
struct MyCoroutine {
struct promise_type {
MyCoroutine get_return_object() { return {}; }
std::suspend_never initial_suspend() { return {}; }
std::suspend_never final_suspend() noexcept { return {}; }
void return_void() {}
void unhandled_exception() {}
};
};
MyCoroutine my_coro() {
std::cout << "Hello from coroutine!\n";
co_return;
}
int main() {
my_coro();
}
4. Concepts:
Enforce constraints on template parameters.
#include <concepts>
#include <iostream>
template<typename T>
requires std::integral<T>
void print(T value) {
std::cout << value << "\n";
}
int main() {
print(42); // Works
// print(3.14); // Error: doesn't satisfy integral concept
}
5. Formatting with ``:
Modernize your output formatting.
#include <format>
#include <iostream>
int main() {
std::cout << std::format("Hello, {}!\n", "C++20");
}
What Undercode Say:
C++20 brings a wealth of new features that modernize the language, making it more powerful and expressive. From modules and ranges to coroutines and concepts, these additions streamline development and improve code readability. Whether you’re a seasoned developer or new to C++, mastering these features will elevate your programming skills. Dive into “Programming with C++20” to explore these advancements in detail and start writing cleaner, more efficient code today.
For further reading, check out the official C++ documentation: https://en.cppreference.com/w/.
References:
Reported By: Andreasfertig All – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
