: Finally integrated into the standard library, providing a cross-platform way to handle paths, directories, and file metadata.
Compile-time conditional compilation inside templates, discarding non-taken branches entirely.
template<typename T> void print(T t) if constexpr (std::is_integral_v<T>) std::cout << "Integral: " << t << '\n'; else std::cout << "Non-integral: " << t << '\n'; c++ 2017
This is perhaps the most noticeable quality-of-life improvement. It allows you to decompose tuples, pairs, and arrays into individual variables automatically.
std::optional<int> find_user_id(bool logged_in) if (logged_in) return 42; return std::nullopt; // No value : Finally integrated into the standard library, providing
Simplifies variadic template recursion using binary operators.
: Previously, nested namespaces required multiple blocks. C++17 allows a more concise syntax: namespace A::B::C ... . It allows you to decompose tuples, pairs, and
C++17 serves as the baseline for many production systems today, especially those waiting for full C++20 adoption.
Memory resources for container allocators, enabling custom memory management without recompiling container code.