C++ reference C++11, C++14, C++17, C++20, C++23, C++26 │ Compiler support C++11, C++14, C++17, C++20, C++23, C++26
Language
Keywords − Preprocessor ASCII chart Basic concepts Comments Names (lookup) Types (fundamental types) The main function Expressions Value categories Evaluation order Operators (precedence) Conversions − Literals Statements if − switch for − range-for (C++11) while − do-while Declarations − Initialization Functions − Overloading Classes (unions) Templates − Exceptions Freestanding implementations
main
for
do
while
Standard library (headers)
Named requirements
Feature test macros (C++20)
Language support library
Program utilities source_location (C++20) Coroutine support (C++20) Three-way comparison (C++20) Type support numeric_limits − type_info initializer_list (C++11)
Concepts library (C++20)
Diagnostics library
exception − System error basic_stacktrace (C++23)
Memory management library
unique_ptr (C++11) shared_ptr (C++11) weak_ptr (C++11) Memory resources (C++17) Allocators − Low level management
Metaprogramming library (C++11)
Type traits − ratio integer_sequence (C++14)
General utilities library
Function objects − hash (C++11) Swap − Type operations (C++11) Integer comparison (C++20) pair − tuple (C++11) optional (C++17) expected (C++23) variant (C++17) − any (C++17) String conversions (C++17) Formatting (C++20) bitset − Bit manipulation (C++20) Debugging support (C++26)
Strings library
basic_string − char_traits basic_string_view (C++17) Null-terminated strings: byte − multibyte − wide
Containers library
vector − deque − array (C++11) list − forward_list (C++11) map − multimap − set − multiset unordered_map (C++11)unordered_multimap (C++11) unordered_set (C++11)unordered_multiset (C++11) Container adaptors span (C++20) − mdspan (C++23)
Iterators library
Ranges library (C++20)
Algorithms library
Execution policies (C++17) Constrained algorithms (C++20)
Numerics library
Common math functions Mathematical special functions (C++17) Mathematical constants (C++20) Basic linear algebra algorithms (C++26) Numeric algorithms Pseudo-random number generation Floating-point environment (C++11) complex − valarray
Date and time library
Calendar (C++20) − Time zone (C++20)
Localization library
locale − Character classification text_encoding (C++26)
Input/output library
Print functions (C++23) Stream-based I/O − I/O manipulators basic_istream − basic_ostream Synchronized output (C++20) File systems (C++17)
Regular expressions library (C++11)
basic_regex − Algorithms Default regular expression grammar
Concurrency support library (C++11)
thread − jthread (C++20) atomic − atomic_flag atomic_ref (C++20) − memory_order Mutual exclusion − Semaphores (C++20) Condition variables − Futures latch (C++20) − barrier (C++20)Safe Reclamation (C++26)
Standard library extensions (library fundamentals TS)
resource_adaptor − invocation_type
Standard library extensions v2 (library fundamentals TS v2)
propagate_const − ostream_joiner − randint observer_ptr − Detection idiom
Standard library extensions v3 (library fundamentals TS v3)
scope_exit − scope_fail − scope_success − unique_resource
Parallelism library extensions v2 (parallelism TS v2)
simd
Concurrency library extensions (concurrency TS) Transactional Memory (TM TS) Reflection (reflection TS)
C reference C89, C95, C99, C11, C17, C23 │ Compiler support C99, C23
Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements
Headers
Type support
Program utilities
Variadic functions
Dynamic memory management
Null-terminated strings: byte − multibyte − wide
Common mathematical functions Floating-point environment (C99) Pseudo-random number generation Complex number arithmetic (C99) Type-generic math (C99)
Concurrency support library (C11)
Dynamic memory extensions (dynamic memory TR) Floating-point extensions, Part 1 (FP Ext 1 TS) Floating-point extensions, Part 4 (FP Ext 4 TS)