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#REDIRECT [[enwiki:Rust_(programming_language)]]
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{{title|C++ language}}
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{{cpp/language/navbar}}
 +
 
 +
This is a reference of the core C++ language constructs.
 +
 
 +
{| cellpadding="5"
 +
|- valign="top"
 +
|
 +
 
 +
'''{{rl|basic concepts|Basic concepts}}'''
 +
<div class="mainpagediv">
 +
{{rlp|comment|Comments}}<br>
 +
{{rl|ascii|ASCII chart}}<br>
 +
{{rl|punctuators|Punctuation}}<br>
 +
{{rl|identifiers|Names and identifiers}}<br>
 +
{{rl|type|Types}} –
 +
{{rl|types|Fundamental types}}<br>
 +
{{rl|object|Object}} –
 +
{{rl|scope|Scope}} –
 +
{{rl|lifetime|Lifetime}}<br>
 +
{{rl|definition|Definitions and ODR}}<br>
 +
{{rl|lookup|Name lookup}}<br>
 +
{{nbsp}} {{rl|qualified lookup|qualified}} – {{rl|unqualified lookup|unqualified}} ({{rl|adl|ADL}})<br>
 +
{{rl|as if|As-if rule}}<br>
 +
{{rl|ub|Undefined behavior (UB)}}<br>
 +
{{rl|memory model|Memory model and data races}}<br>
 +
{{rl|charset|Character sets and encodings}}<br>
 +
{{rl|translation phases|Phases of translation}}<br>
 +
{{rl|main function|The {{tt|main}} function}}<br>
 +
{{rl|modules|Modules}} {{mark c++20}}<br>
 +
</div>
 +
 
 +
'''{{rlp|keyword|Keywords}}'''
 +
<div class="mainpagediv">
 +
<!--  -->
 +
</div>
 +
 
 +
'''{{rlp|preprocessor|Preprocessor}}'''
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<div class="mainpagediv">
 +
{{rlp|preprocessor/conditional|{{tt|#if}} - {{tt|#ifdef}} - {{tt|#ifndef}} - {{tt|#elif}}}}<br>
 +
{{rlp|preprocessor/conditional|{{tt|#elifdef}} - {{tt|#elifndef}}}} {{mark c++23}}<br>
 +
{{rlp|preprocessor/replace|{{tt|#define}} - {{tt|#}} - {{tt|##}}}}<br>
 +
{{rlpt|preprocessor/include|#include}} -
 +
{{rlpt|preprocessor/impl|#pragma}}<br>
 +
{{rlpt|preprocessor/line|#line}} -
 +
{{rlp|preprocessor/error|{{tt|#error}} - {{tt|#warning}}}} {{mark c++23}}<br>
 +
</div>
 +
 
 +
'''{{rl|expressions|Expressions}}'''
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<div class="mainpagediv">
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{{rl|value category|Value categories}}<br>
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{{rl|eval order|Evaluation order and sequencing}}<br>
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{{rl|constant expression|Constant expressions}}<br>
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{{rl|expressions#Operators|Operators}}<br>
 +
{{nbsp}} {{rl|operator assignment|assignment}} –
 +
{{rl|operator arithmetic|arithmetic}}<br>
 +
{{nbsp}} {{rl|operator incdec|increment and decrement}}<br>
 +
{{nbsp}} {{rl|operator logical|logical}} –
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{{rl|operator comparison|comparison}}<br>
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{{nbsp}} {{rl|operator member access|member access and indirection}}<br>
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{{nbsp}} {{rl|operator other|call, comma, ternary}}<br>
 +
{{nbsp}} {{rlt|sizeof}} – {{rlt|alignof}} {{mark c++11}}<br>
 +
{{nbsp}} {{rlt|new}} – {{rlt|delete}} – {{rlt|typeid}}<br>
 +
{{nbsp}} {{rl|operator_alternative|alternative representation}}<br>
 +
{{rl|operators|Operator overloading}}<br>
 +
{{rl|default comparisons|Default comparisons}} {{mark c++20}}<br>
 +
{{rl|operator precedence|Operator precedence}}<br>
 +
{{rl|expressions#Conversions|Conversions}}<br>
 +
{{nbsp}} {{rl|implicit conversion|implicit}} –
 +
{{rl|explicit cast|explicit}} –
 +
{{rl|cast operator|user-defined}}<br>
 +
{{nbsp}} {{rl|usual arithmetic conversions|Usual arithmetic conversions}}<br>
 +
{{nbsp}} {{rlt|static_cast}} – {{rlt|dynamic_cast}}<br>
 +
{{nbsp}} {{rlt|const_cast}} – {{rlt|reinterpret_cast}}<br>
 +
{{rl|expressions#Literals|Literals}} ({{rl|escape|Escape sequences}})<br>
 +
{{nbsp}} {{rl|bool literal|boolean}} –
 +
{{rl|integer literal|integer}} –
 +
{{rl|floating literal|floating}}<br>
 +
{{nbsp}} {{rl|character literal|character}} –
 +
{{rl|string literal|string}}<br>
 +
{{nbsp}} {{rlt|nullptr}} {{mark c++11}}<br>
 +
{{nbsp}} {{rl|user literal|user-defined (UDL)}} {{mark c++11}}<br>
 +
</div>
 +
 
 +
|
 +
 
 +
'''{{rl|declarations|Declarations}}'''
 +
<div class="mainpagediv">
 +
{{rl|namespace|Namespace declaration}}<br>
 +
{{rl|namespace alias|Namespace alias}}<br>
 +
{{rl|reference|References}} –
 +
{{rl|pointer|Pointers}} –
 +
{{rl|array|Arrays}}<br>
 +
{{rl|structured binding|Structured bindings}} {{mark c++17}}<br>
 +
{{rl|enum|Enumerations and enumerators}}<br>
 +
{{rl|storage duration|Storage duration and linkage}}<br>
 +
{{rl|tu local|Translation-unit-local}} {{mark c++20}}<br>
 +
{{rl|language linkage|Language linkage}}<br>
 +
{{rl|inline|{{tt|inline}} specifier}}<br>
 +
{{rl|asm|Inline assembly}}<br>
 +
{{rl|cv|{{tt|const}}/{{tt|volatile}}}}<br>
 +
{{rlt|constexpr}} {{mark c++11}}<br>
 +
{{rlt|consteval}} {{mark c++20}}<br>
 +
{{rlt|constinit}} {{mark c++20}}<br>
 +
{{rlt|decltype}} {{mark c++11}} – {{rlt|auto}} {{mark c++11}}<br>
 +
{{rlt|typedef}} – {{rl|type alias|Type alias}} {{mark c++11}}<br>
 +
{{rl|elaborated type specifier|Elaborated type specifiers}}<br>
 +
{{rl|attributes|Attributes}} {{mark c++11}}<br>
 +
{{rlt|alignas}} {{mark c++11}}<br>
 +
{{rlt|static_assert}} {{mark c++11}}<br>
 +
</div>
 +
 
 +
'''{{rl|initialization|Initialization}}'''
 +
<div class="mainpagediv">
 +
{{rl|default initialization|Default initialization}}<br>
 +
{{rl|value initialization|Value initialization}}<br>
 +
{{rl|copy initialization|Copy initialization}}<br>
 +
{{rl|direct initialization|Direct initialization}}<br>
 +
{{rl|aggregate initialization|Aggregate initialization}}<br>
 +
{{rl|list initialization|List initialization}} {{mark c++11}}<br>
 +
{{rl|reference initialization|Reference initialization}}<br>
 +
{{rl|initialization#Non-local variables|Static non-local initialization}}<br>
 +
{{nbsp}}{{rl|zero initialization|zero}} – {{rl|constant initialization|constant}}<br>
 +
{{rl|initialization#Non-local variables|Dynamic non-local initialization}}<br>
 +
{{nbsp}}{{rl|initialization#Non-local variables|ordered}} – {{rl|initialization#Non-local variables|unordered}}<br>
 +
{{rl|copy elision|Copy elision (RVO)}}
 +
</div>
 +
 
 +
'''{{rl|functions|Functions}}'''
 +
<div class="mainpagediv">
 +
{{rl|function|Function declaration}}<br>
 +
{{rl|default arguments|Default arguments}}<br>
 +
{{rl|variadic arguments|Variadic arguments}}<br>
 +
{{rl|lambda|Lambda expression}} {{mark c++11}}<br>
 +
{{rl|adl|Argument-dependent lookup}}<br>
 +
{{rl|overload resolution|Overload resolution}}<br>
 +
{{rl|operators|Operator overloading}}<br>
 +
{{rl|overloaded address|Address of an overload set}}<br>
 +
{{rl|coroutines|Coroutines}} {{mark c++20}}<br>
 +
</div>
 +
 
 +
'''{{rl|statements|Statements}}'''
 +
<div class="mainpagediv">
 +
{{rlt|if}} –
 +
{{rlt|switch}}<br>
 +
{{rlt|for}} –
 +
{{rl|range-for|range-{{tt|for}}}} {{mark c++11}}<br>
 +
{{rlt|while}} – {{rl|do|{{tt|do}}-{{tt|while}}}}<br>
 +
{{rlt|continue}} –
 +
{{rlt|break}} –
 +
{{rlt|goto}} –
 +
{{rlt|return}}<br>
 +
{{rl|transactional memory|{{tt|synchronized}} and {{tt|atomic}}}} {{mark since tm ts}}<br>
 +
</div>
 +
 
 +
|
 +
 
 +
'''{{rl|classes|Classes}}'''
 +
<div class="mainpagediv">
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{{rl|class|Class types}} –
 +
{{rl|union|Union types}}<br>
 +
{{rl|injected-class-name}}<br>
 +
{{rl|data members|Data members}} –
 +
{{rl|bit field|Bit-fields}}<br>
 +
{{rl|member functions|Member functions}} –
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{{rl|this|The {{tt|this}} pointer}}<br>
 +
{{rl|static|Static members}} –
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{{rl|nested types|Nested classes}}<br>
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{{rl|derived class|Derived class}} –
 +
{{rl|using declaration|{{tt|using}}-declaration}}<br>
 +
{{rl|ebo|Empty base optimization (EBO)}}<br>
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{{rl|virtual|Virtual function}} –
 +
{{rl|abstract class|Abstract class (ABC)}}<br>
 +
{{rlt|override}} {{mark c++11}} – {{rlt|final}} {{mark c++11}}<br>
 +
{{rl|access|Member access}} –
 +
{{rlt|friend}}<br>
 +
{{rl|constructor|Constructors and member initializer lists}}<br>
 +
{{rl|default constructor|Default constructor}} –
 +
{{rl|destructor|Destructor}}<br>
 +
{{rl|copy constructor|Copy constructor}} –
 +
{{rl|copy assignment|Copy assignment}}<br>
 +
{{rl|move constructor|Move constructor}} {{mark c++11}}<br>
 +
{{rl|move assignment|Move assignment}} {{mark c++11}}<br>
 +
{{rl|converting constructor|Converting constructor}}<br>
 +
{{rl|explicit|{{tt|explicit}} specifier}}<br>
 +
</div>
 +
 
 +
'''{{rl|templates|Templates}}'''
 +
<div class="mainpagediv">
 +
{{rl|template parameters|Template parameters and arguments}}<br>
 +
{{rl|class template|Class template}} –
 +
{{rl|function template|Function template}}<br>
 +
{{rl|variable template|Variable template}} {{mark c++14}}<br>
 +
{{rl|member template|Class member template}}<br>
 +
{{rl|template argument deduction|Template argument deduction}}<br>
 +
{{rl|class template argument deduction|Class template argument deduction (CTAD)}} {{mark c++17}}<br>
 +
{{rl|template specialization|Explicit specialization}} – {{rl|partial specialization|Partial specialization}}<br>
 +
{{rl|parameter pack|Parameter packs}} {{mark c++11}} –
 +
{{rlt|sizeof...}} {{mark c++11}}<br>
 +
{{rl|fold|Fold-expressions}} {{mark c++17}}<br>
 +
{{rl|dependent name|Dependent names}} –
 +
{{rl|sfinae|SFINAE}}<br>
 +
{{rl|constraints|Constraints and concepts}} {{mark c++20}}<br>
 +
{{rl|requires|Requires expression}} {{mark c++20}}<br>
 +
</div>
 +
 
 +
'''{{rl|exceptions|Exceptions}}'''
 +
<div class="mainpagediv">
 +
{{rl|throw|{{tt|throw}}-expression}}<br>
 +
{{rl|try catch|{{tt|try}}-{{tt|catch}} block}}<br>
 +
{{rl|function-try-block|Function-{{tt|try}}-block}}<br>
 +
{{rl|noexcept spec|{{tt|noexcept}} specifier}} {{mark c++11}}<br>
 +
{{rl|noexcept|{{tt|noexcept}} operator}} {{mark c++11}}<br>
 +
{{rl|except spec|Dynamic exception specification}} {{mark tooltip|until C++17|deprecated in C++11}}<br>
 +
</div>
 +
 
 +
'''Miscellaneous'''
 +
<div class="mainpagediv">
 +
{{rl|history|History of C++}}<br>
 +
{{rl|extending std|Extending the namespace std}}<br>
 +
{{rl|acronyms|Acronyms}}:
 +
[[cpp/ranges/cpo|CPO]],
 +
[[cpp/language/ndr|IFNDR]],
 +
[[cpp/language/ndr|NDR]],
 +
[[cpp/string/byte|NTBS]],<br>
 +
[[cpp/language/template_parameters|NTTP]],
 +
[[cpp/ranges#Range adaptor objects|RAO]],
 +
[[cpp/memory/allocator_traits/select_on_container_copy_construction|SOCCC]],
 +
[[cpp/language/template metaprogramming|TMP]],
 +
[[cpp/language/translation phases#Phase 8|TU]]
 +
</div>
 +
 
 +
'''Idioms'''
 +
<div class="mainpagediv">
 +
{{rl|crtp|Curiously Recurring Template Pattern (CRTP)}}<br>
 +
{{rl|pimpl|Pointer to implementation (PIMPL)}}<br>
 +
{{rl|raii|Resource acquisition is initialization (RAII)}}<br>
 +
{{rl|rule of three|Rule of three/five/zero}}<br>
 +
{{rl|Zero-overhead principle|Zero-overhead principle}}<br>
 +
</div>
 +
|}
 +
 
 +
===See also===
 +
{{dsc begin}}
 +
{{dsc see c|c/language|C language constructs|nomono=true}}
 +
{{dsc end}}
 +
 
 +
{{langlinks|ar|de|es|fr|it|ja|ko|pl|pt|ru|tr|zh}}

Revision as of 09:28, 31 July 2023

 
C++
 
C++ language
General topics
Flow control
Conditional execution statements
if
Iteration statements (loops)
for
range-for (C++11)
Jump statements
Functions
Function declaration
Lambda function expression
inline specifier
Dynamic exception specifications (until C++17*)
noexcept specifier (C++11)
Exceptions
Namespaces
Types
Specifiers
const/volatile
decltype (C++11)
auto (C++11)
constexpr (C++11)
consteval (C++20)
constinit (C++20)
Storage duration specifiers
Initialization
Expressions
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
Memory allocation
Classes
Class-specific function properties
explicit (C++11)
static

Special member functions
Templates
Miscellaneous
 

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
Operators
  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
Conversions
  implicit – explicit – user-defined
  Usual arithmetic conversions
  static_cast – dynamic_cast
  const_cast – reinterpret_cast
Literals (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
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