C++ language

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Execution support library (C++26)

Technical specifications

Symbols index

External libraries

 

C++ language

General topics
Preprocessor Comments	Keywords Escape sequences
Flow control
Conditional execution statements
if	switch
Iteration statements (loops)
for range-for (C++11)	while do-while
Jump statements
continue - break	goto - return
Functions
Function declaration
Lambda function expression
inline specifier
Dynamic exception specifications (until C++17*)
noexcept specifier (C++11)
Exceptions
throw-expression try block	handler
Namespaces
Namespace declaration	Namespace aliases
Types
Fundamental types Enumeration types Function types	Class/struct types Union types
Specifiers
const/volatile decltype (C++11) auto (C++11)	constexpr (C++11) consteval (C++20) constinit (C++20)
Storage duration specifiers
Initialization
Default-initialization Value-initialization Zero-initialization Copy-initialization Direct-initialization	Aggregate initialization List-initialization (C++11)   Constant initialization Reference initialization

Expressions
Value categories Order of evaluation	Operators Operator precedence
Alternative representations
Literals
Boolean - Integer - Floating-point
Character - String - nullptr (C++11)
User-defined (C++11)
Utilities
Attributes (C++11)
Types
typedef declaration
Type alias declaration (C++11)
Casts
Implicit conversions static_cast const_cast	Explicit conversions dynamic_cast reinterpret_cast
Memory allocation
new expression	delete expression
Classes
Class declaration Constructors this pointer	Access specifiers friend specifier
Class-specific function properties
Virtual function override specifier (C++11)   final specifier (C++11)	explicit (C++11) static
Special member functions
Default constructor Copy constructor Move constructor (C++11)	Copy assignment Move assignment (C++11) Destructor
Templates
Class template Function template	Template specialization Parameter packs (C++11)
Miscellaneous
Inline assembly	History of C++

 

This is a reference of the core C++ language constructs.

Basic concepts Comments ASCII chart Punctuation Names and identifiers Types – Fundamental types Object – Scope – Lifetime Definitions and ODR Name lookup   qualified – unqualified (ADL) As-if rule Undefined behavior (UB) Memory model and data races Character sets and encodings Phases of translation The main function Modules (C++20) Keywords Preprocessor #if - #ifdef - #ifndef - #elif #elifdef - #elifndef (C++23) #define - # - ## #include - #pragma #line - #error - #warning (C++23) Expressions Value categories Evaluation order and sequencing Constant expressions   assignment – arithmetic   increment and decrement   logical – comparison   member access and indirection   call, comma, ternary   sizeof – alignof (C++11)   new – delete – typeid   alternative representation Operator overloading Default comparisons (C++20) Operator precedence   implicit – explicit – user-defined   Usual arithmetic conversions   static_cast – dynamic_cast   const_cast – reinterpret_cast (Escape sequences)   boolean – integer – floating   character – string   nullptr (C++11)   user-defined (UDL) (C++11)

Declarations Namespace declaration Namespace alias References – Pointers – Arrays Structured bindings (C++17) Enumerations and enumerators Storage duration and linkage Translation-unit-local (C++20) Language linkage inline specifier Inline assembly const/volatile constexpr (C++11) consteval (C++20) constinit (C++20) decltype (C++11) – auto (C++11) typedef – Type alias (C++11) Elaborated type specifiers Attributes (C++11) alignas (C++11) static_assert (C++11) Initialization Default-initialization Value-initialization Copy-initialization Direct-initialization Aggregate initialization List-initialization (C++11) Reference initialization Static non-local initialization  zero – constant Dynamic non-local initialization  ordered – unordered Copy elision (RVO) Functions Function declaration Default arguments Variadic arguments Lambda expression (C++11) Argument-dependent lookup Overload resolution Operator overloading Address of an overload set Coroutines (C++20) Statements if – switch for – range-for (C++11) while – do-while continue – break – goto – return synchronized and atomic (TM TS)

Classes Class types – Union types injected-class-name Data members – Bit-fields Member functions – The this pointer Static members – Nested classes Derived class – using-declaration Empty base optimization (EBO) Virtual function – Abstract class (ABC) override (C++11) – final (C++11) Member access – friend Constructors and member initializer lists Default constructor – Destructor Copy constructor – Copy assignment Move constructor (C++11) Move assignment (C++11) Converting constructor explicit specifier Templates Template parameters and arguments Class template – Function template Variable template (C++14) Class member template Template argument deduction Class template argument deduction (CTAD) (C++17) Explicit specialization – Partial specialization Parameter packs (C++11) – sizeof... (C++11) Fold-expressions (C++17) Dependent names – SFINAE Constraints and concepts (C++20) Requires expression (C++20) Exceptions throw-expression try-catch block Function-try-block noexcept specifier (C++11) noexcept operator (C++11) Dynamic exception specification (until C++17*) Miscellaneous History of C++ Extending the namespace std Acronyms: CPO, IFNDR, NDR, NTBS, NTTP, RAO, SOCCC, TMP, TU Idioms Curiously Recurring Template Pattern (CRTP) Pointer to implementation (PIMPL) Resource acquisition is initialization (RAII) Rule of three/five/zero Zero-overhead principle

See also

C documentation for C language constructs