Appendix 3: Modern C++ Feature Index

This appendix groups the main features covered in this book by standard version and notes the chapter where each appears, so you can browse "by version" or quickly locate a feature later. If you are already familiar with the content of a given version, feel free to jump straight to the section you need.

C++11 / C++14

Feature	Chapter
nullptr	Chapter 2
constexpr (relaxed in C++14)	Chapter 2
Initializer lists (std::initializer_list)	Chapter 2
auto type deduction	Chapter 2
decltype / decltype(auto) (C++14)	Chapter 2
Tail return type	Chapter 2
Range-based for loop	Chapter 2
External / alias / default / variadic templates	Chapter 2
Delegating and inheriting constructors	Chapter 2
Explicit override / final	Chapter 2
Explicit = default / = delete	Chapter 2
Strongly-typed enums (enum class)	Chapter 2
SFINAE and std::enable_if	Chapter 2
Lambda expressions, generic lambdas (C++14)	Chapter 3
std::function, std::bind	Chapter 3
Rvalue references, move semantics, perfect forwarding	Chapter 3
std::array, std::forward_list, unordered containers, std::tuple	Chapter 4
Smart pointers shared_ptr / unique_ptr / weak_ptr, make_unique (C++14)	Chapter 5
Regular expressions (std::regex)	Chapter 6
Threads, mutexes, futures, condition variables, atomics & memory model	Chapter 7
long long, noexcept, raw/user-defined literals, memory alignment	Chapter 9

C++17

Feature	Chapter
Structured bindings	Chapter 2
if / switch init-statements	Chapter 2
if constexpr	Chapter 2
Fold expressions, auto non-type template parameters	Chapter 2
Inline variables, nested namespaces, constexpr lambda	Chapter 2
Single-argument static_assert, new aggregate rules	Chapter 2
Boolean logic metafunctions, __has_include	Chapter 2
Guaranteed copy elision	Chapter 3
std::string_view, std::byte	Chapter 4
Associative container improvements (try_emplace / merge …), std::pmr	Chapter 4
std::filesystem	Chapter 8
new for over-aligned types	Chapter 9
Mathematical special functions	Chapter 9

C++20

Feature	Chapter
Concepts and constraints	Chapter 10
Modules	Chapter 10
Ranges	Chapter 10
Coroutines	Chapter 10
std::bit_cast	Chapter 9

C++23

Feature	Chapter
Deducing this (explicit object parameter)	Chapter 11
if consteval, multidimensional subscript	Chapter 11
auto(x), static operator(), [[assume]]	Chapter 11
std::expected	Chapter 11
std::print / std::println	Chapter 11
std::mdspan, std::flat_map / std::flat_set	Chapter 11
Ranges additions (zip …), string::contains, std::byteswap	Chapter 11

C++26 (outlook)

Feature	Chapter
Static reflection	Chapter 12
Contracts	Chapter 12
Pack indexing, = delete with a reason, the placeholder _	Chapter 12
std::execution (senders / receivers)	Chapter 12
Saturation arithmetic	Chapter 12