C++ Standards (C++98 to C++26)

The ISO versions and their headline features.

Easy

C++98/03 — the classic language and STL.
C++11 — the "modern C++" revolution: auto, lambdas, move semantics, smart pointers, threads.
C++14 — generic lambdas, make_unique.
C++17 — structured bindings, optional, variant, string_view, filesystem, parallel algorithms.
C++20 — concepts, ranges, coroutines, modules, <=>, format, span.
C++23 — expected, print, mdspan, deducing this.
C++26 — reflection, contracts, std::execution (in progress).

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