Namespaces
Variants
Views
Actions

Difference between revisions of "cpp/language"

From cppreference.com
< cpp
m (fix improper hyphenation; the C++ standard defines it as "copy-initialization")
m (Added (CTAD) acronym explicitly.)
 
(15 intermediate revisions by 5 users not shown)
Line 4: Line 4:
 
This is a reference of the core C++ language constructs.
 
This is a reference of the core C++ language constructs.
  
−
{| cellpadding="5"
+
{|cellpadding="5"
−
|- valign="top"
+
|-valign="top"
 
|
 
|
−
 
 
'''{{rl|basic concepts|Basic concepts}}'''
 
'''{{rl|basic concepts|Basic concepts}}'''
 
<div class="mainpagediv">
 
<div class="mainpagediv">
Line 21: Line 20:
 
{{rl|definition|Definitions and ODR}}<br>
 
{{rl|definition|Definitions and ODR}}<br>
 
{{rl|lookup|Name lookup}}<br>
 
{{rl|lookup|Name lookup}}<br>
−
{{nbsp}} {{rl|qualified lookup|qualified}} – {{rl|unqualified lookup|unqualified}} ({{rl|adl|ADL}})<br>
+
{{nbsp|4}}{{rl|qualified lookup|qualified}} – {{rl|unqualified lookup|unqualified}} ({{rl|adl|ADL}})<br>
 
{{rl|as if|As-if rule}}<br>
 
{{rl|as if|As-if rule}}<br>
 
{{rl|ub|Undefined behavior (UB)}}<br>
 
{{rl|ub|Undefined behavior (UB)}}<br>
−
{{rl|memory model|Memory model and data races}}<br>
+
{{rl|memory model|Memory}} – {{rl|multithread|Multithread}} {{mark c++11}}<br>
 
{{rl|charset|Character sets and encodings}}<br>
 
{{rl|charset|Character sets and encodings}}<br>
 
{{rl|translation phases|Phases of translation}}<br>
 
{{rl|translation phases|Phases of translation}}<br>
Line 33: Line 32:
 
'''{{rlp|keyword|Keywords}}'''
 
'''{{rlp|keyword|Keywords}}'''
 
<div class="mainpagediv">
 
<div class="mainpagediv">
−
<!-- -->
+
<!---->
 
</div>
 
</div>
  
Line 44: Line 43:
 
{{rlpt|preprocessor/impl|#pragma}}<br>
 
{{rlpt|preprocessor/impl|#pragma}}<br>
 
{{rlpt|preprocessor/line|#line}} -
 
{{rlpt|preprocessor/line|#line}} -
−
{{rlp|preprocessor/error|{{tt|#error}} - {{tt|#warning}}}} {{mark c++23}}<br>
+
{{rlpt|preprocessor/error|#error}}<br>
 +
{{rlpt|preprocessor/error|#warning}} {{mark c++23}}<br>
 
</div>
 
</div>
  
Line 50: Line 50:
 
<div class="mainpagediv">
 
<div class="mainpagediv">
 
{{rl|value category|Value categories}}<br>
 
{{rl|value category|Value categories}}<br>
−
{{rl|eval order|Evaluation order and sequencing}}<br>
+
{{rl|eval order|Evaluation order}}<br>
 
{{rl|constant expression|Constant expressions}}<br>
 
{{rl|constant expression|Constant expressions}}<br>
−
{{rl|expressions#Operators|Operators}}<br>
+
{{ls|cpp/language/expressions#Operators}}<br>
−
{{nbsp}} {{rl|operator assignment|assignment}} –
+
{{nbsp|4}}{{rl|operator assignment|assignment}} –
 
{{rl|operator arithmetic|arithmetic}}<br>
 
{{rl|operator arithmetic|arithmetic}}<br>
−
{{nbsp}} {{rl|operator incdec|increment and decrement}}<br>
+
{{nbsp|4}}{{rl|operator incdec|increment and decrement}}<br>
−
{{nbsp}} {{rl|operator logical|logical}} –
+
{{nbsp|4}}{{rl|operator logical|logical}} –
 
{{rl|operator comparison|comparison}}<br>
 
{{rl|operator comparison|comparison}}<br>
−
{{nbsp}} {{rl|operator member access|member access and indirection}}<br>
+
{{nbsp|4}}{{rl|operator member access|member access}}<br>
−
{{nbsp}} {{rl|operator other|call, comma, ternary}}<br>
+
{{nbsp|4}}{{rl|operator other|call, comma, ternary}}<br>
−
{{nbsp}} {{rlt|sizeof}} – {{rlt|alignof}} {{mark c++11}}<br>
+
{{nbsp|4}}{{rlt|sizeof}} – {{rlt|alignof}} {{mark c++11}}<br>
−
{{nbsp}} {{rlt|new}} – {{rlt|delete}} – {{rlt|typeid}}<br>
+
{{nbsp|4}}{{rlt|new}} – {{rlt|delete}} – {{rlt|typeid}}<br>
−
{{nbsp}} {{rl|operator_alternative|alternative representation}}<br>
+
{{nbsp|4}}{{rl|operator_alternative|alternative representation}}<br>
−
{{rl|operators|Operator overloading}}<br>
+
 
{{rl|default comparisons|Default comparisons}} {{mark c++20}}<br>
 
{{rl|default comparisons|Default comparisons}} {{mark c++20}}<br>
 
{{rl|operator precedence|Operator precedence}}<br>
 
{{rl|operator precedence|Operator precedence}}<br>
−
{{rl|expressions#Conversions|Conversions}}<br>
+
{{ls|cpp/language/expressions#Conversions}}<br>
−
{{nbsp}} {{rl|implicit conversion|implicit}} –
+
{{nbsp|4}}{{rl|implicit conversion|implicit}} – {{rl|explicit cast|explicit}}<br>
−
{{rl|explicit cast|explicit}} –
+
{{nbsp|4}}{{rl|cast operator|user-defined}}<br>
−
{{rl|cast operator|user-defined}}<br>
+
{{nbsp|4}}{{rl|usual arithmetic conversions|Usual arithmetic conversions}}<br>
−
{{nbsp}} {{rl|usual arithmetic conversions|Usual arithmetic conversions}}<br>
+
{{nbsp|4}}{{rlt|static_cast}} – {{rlt|dynamic_cast}}<br>
−
{{nbsp}} {{rlt|static_cast}} – {{rlt|dynamic_cast}}<br>
+
{{nbsp|4}}{{rlt|const_cast}}<br>
−
{{nbsp}} {{rlt|const_cast}} – {{rlt|reinterpret_cast}}<br>
+
{{nbsp|4}}{{rlt|reinterpret_cast}}<br>
−
{{rl|expressions#Literals|Literals}} ({{rl|escape|Escape sequences}})<br>
+
{{ls|cpp/language/expressions#Literals}} ({{rl|escape|Escape sequences}})<br>
−
{{nbsp}} {{rl|bool literal|boolean}} –
+
{{nbsp|4}}{{rl|bool literal|boolean}} –
 
{{rl|integer literal|integer}} –
 
{{rl|integer literal|integer}} –
 
{{rl|floating literal|floating}}<br>
 
{{rl|floating literal|floating}}<br>
−
{{nbsp}} {{rl|character literal|character}} –
+
{{nbsp|4}}{{rl|character literal|character}} –
 
{{rl|string literal|string}}<br>
 
{{rl|string literal|string}}<br>
−
{{nbsp}} {{rlt|nullptr}} {{mark c++11}}<br>
+
{{nbsp|4}}{{rlt|nullptr}} {{mark c++11}}<br>
−
{{nbsp}} {{rl|user literal|user-defined (UDL)}} {{mark c++11}}<br>
+
{{nbsp|4}}{{rl|user literal|user-defined (UDL)}} {{mark c++11}}<br>
 
</div>
 
</div>
−
 
 
|
 
|
−
 
 
'''{{rl|declarations|Declarations}}'''
 
'''{{rl|declarations|Declarations}}'''
 
<div class="mainpagediv">
 
<div class="mainpagediv">
 +
{{rl|conflicting declarations|Conflicting declarations}}<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|namespace|Namespace declaration}}<br>
 
{{rl|namespace|Namespace declaration}}<br>
 
{{rl|namespace alias|Namespace alias}}<br>
 
{{rl|namespace alias|Namespace alias}}<br>
Line 94: Line 95:
 
{{rl|structured binding|Structured bindings}} {{mark c++17}}<br>
 
{{rl|structured binding|Structured bindings}} {{mark c++17}}<br>
 
{{rl|enum|Enumerations and enumerators}}<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|inline|{{tt|inline}} specifier}}<br>
 
{{rl|asm|Inline assembly}}<br>
 
{{rl|asm|Inline assembly}}<br>
Line 103: Line 101:
 
{{rlt|consteval}} {{mark c++20}}<br>
 
{{rlt|consteval}} {{mark c++20}}<br>
 
{{rlt|constinit}} {{mark c++20}}<br>
 
{{rlt|constinit}} {{mark c++20}}<br>
−
{{rlt|decltype}} {{mark c++11}} – {{rlt|auto}} {{mark c++11}}<br>
+
{{rlt|decltype}} {{mark c++11}}<br>
 +
{{rlt|auto}} {{mark c++11}}<br>
 
{{rlt|typedef}} – {{rl|type alias|Type alias}} {{mark c++11}}<br>
 
{{rlt|typedef}} – {{rl|type alias|Type alias}} {{mark c++11}}<br>
 
{{rl|elaborated type specifier|Elaborated type specifiers}}<br>
 
{{rl|elaborated type specifier|Elaborated type specifiers}}<br>
Line 113: Line 112:
 
'''{{rl|initialization|Initialization}}'''
 
'''{{rl|initialization|Initialization}}'''
 
<div class="mainpagediv">
 
<div class="mainpagediv">
−
{{rl|default initialization|Default initialization}}<br>
+
{{rl|default initialization|Default-initialization}}<br>
−
{{rl|value initialization|Value initialization}}<br>
+
{{rl|value initialization|Value-initialization}}<br>
 
{{rl|copy initialization|Copy-initialization}}<br>
 
{{rl|copy initialization|Copy-initialization}}<br>
−
{{rl|direct initialization|Direct initialization}}<br>
+
{{rl|direct initialization|Direct-initialization}}<br>
 
{{rl|aggregate initialization|Aggregate initialization}}<br>
 
{{rl|aggregate initialization|Aggregate initialization}}<br>
−
{{rl|list initialization|List initialization}} {{mark c++11}}<br>
+
{{rl|list initialization|List-initialization}} {{mark c++11}}<br>
 
{{rl|reference initialization|Reference initialization}}<br>
 
{{rl|reference initialization|Reference initialization}}<br>
 
{{rl|initialization#Non-local variables|Static non-local initialization}}<br>
 
{{rl|initialization#Non-local variables|Static non-local initialization}}<br>
−
{{nbsp}}{{rl|zero initialization|zero}} – {{rl|constant initialization|constant}}<br>
+
{{nbsp|4}}{{rl|zero initialization|zero}} – {{rl|constant initialization|constant}}<br>
 
{{rl|initialization#Non-local variables|Dynamic non-local initialization}}<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>
+
{{nbsp|4}}{{rl|initialization#Non-local variables|ordered}} – {{rl|initialization#Non-local variables|unordered}}<br>
 
{{rl|copy elision|Copy elision (RVO)}}
 
{{rl|copy elision|Copy elision (RVO)}}
 
</div>
 
</div>
Line 133: Line 132:
 
{{rl|variadic arguments|Variadic arguments}}<br>
 
{{rl|variadic arguments|Variadic arguments}}<br>
 
{{rl|lambda|Lambda expression}} {{mark c++11}}<br>
 
{{rl|lambda|Lambda expression}} {{mark c++11}}<br>
−
{{rl|adl|Argument-dependent lookup}}<br>
 
 
{{rl|overload resolution|Overload resolution}}<br>
 
{{rl|overload resolution|Overload resolution}}<br>
 
{{rl|operators|Operator overloading}}<br>
 
{{rl|operators|Operator overloading}}<br>
Line 148: Line 146:
 
{{rlt|while}} – {{rl|do|{{tt|do}}-{{tt|while}}}}<br>
 
{{rlt|while}} – {{rl|do|{{tt|do}}-{{tt|while}}}}<br>
 
{{rlt|continue}} –
 
{{rlt|continue}} –
−
{{rlt|break}} –
+
{{rlt|break}}<br>
 
{{rlt|goto}} –
 
{{rlt|goto}} –
 
{{rlt|return}}<br>
 
{{rlt|return}}<br>
−
{{rl|transactional memory|{{tt|synchronized}} and {{tt|atomic}}}} {{mark since tm ts}}<br>
+
{{rl|transactional memory|{{tt|synchronized}}/{{tt|atomic}}}} {{mark since tm ts}}<br>
 
</div>
 
</div>
−
 
 
|
 
|
−
 
 
'''{{rl|classes|Classes}}'''
 
'''{{rl|classes|Classes}}'''
 
<div class="mainpagediv">
 
<div class="mainpagediv">
Line 193: Line 189:
 
{{rl|variable template|Variable template}} {{mark c++14}}<br>
 
{{rl|variable template|Variable template}} {{mark c++14}}<br>
 
{{rl|member template|Class member template}}<br>
 
{{rl|member template|Class member template}}<br>
−
{{rl|template argument deduction|Template argument deduction}}<br>
+
'''Template argument deduction'''<br>
−
{{rl|class template argument deduction|Class template argument deduction (CTAD)}} {{mark c++17}}<br>
+
{{nbsp|4}}{{rl|template argument deduction|function}} –
 +
{{rl|class template argument deduction|class (CTAD)}} {{mark c++17}}<br>
 
{{rl|template specialization|Explicit specialization}} – {{rl|partial specialization|Partial specialization}}<br>
 
{{rl|template specialization|Explicit specialization}} – {{rl|partial specialization|Partial specialization}}<br>
−
{{rl|parameter pack|Parameter packs}} {{mark c++11}} –
+
{{rl|parameter pack|Parameter packs}} {{mark c++11}}<br>
 
{{rlt|sizeof...}} {{mark c++11}}<br>
 
{{rlt|sizeof...}} {{mark c++11}}<br>
−
{{rl|fold|Fold-expressions}} {{mark c++17}}<br>
+
{{rl|fold|Fold expressions}} {{mark c++17}}<br>
 +
{{rl|pack_indexing|Pack indexing}} {{mark c++26}}<br>
 
{{rl|dependent name|Dependent names}} –
 
{{rl|dependent name|Dependent names}} –
 
{{rl|sfinae|SFINAE}}<br>
 
{{rl|sfinae|SFINAE}}<br>
Line 207: Line 205:
 
'''{{rl|exceptions|Exceptions}}'''
 
'''{{rl|exceptions|Exceptions}}'''
 
<div class="mainpagediv">
 
<div class="mainpagediv">
−
{{rl|throw|{{tt|throw}}-expression}}<br>
+
{{rl|try|{{tt|try}} block}}<br>
−
{{rl|try catch|{{tt|try}}-{{tt|catch}} block}}<br>
+
{{rl|throw|Throwing exceptions}}<br>
−
{{rl|function-try-block|Function-{{tt|try}}-block}}<br>
+
{{rl|catch|Handling exceptions}}<br>
−
{{rl|noexcept spec|{{tt|noexcept}} specifier}} {{mark c++11}}<br>
+
'''Exception specification'''<br>
 +
{{nbsp|4}}{{rl|noexcept spec|{{tt|noexcept}} specification}} {{mark c++11}}<br>
 +
{{nbsp|4}}{{rl|except spec|Dynamic specification}} {{mark tooltip|until C++17|deprecated in C++11}}<br>
 
{{rl|noexcept|{{tt|noexcept}} operator}} {{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>
 
</div>
  
Line 224: Line 223:
 
[[cpp/language/ndr|NDR]],
 
[[cpp/language/ndr|NDR]],
 
[[cpp/string/byte|NTBS]],<br>
 
[[cpp/string/byte|NTBS]],<br>
−
[[cpp/language/template_parameters|NTTP]],
+
[[cpp/language/template parameters#Non-type template parameter|NTTP]],
 
[[cpp/ranges#Range adaptor objects|RAO]],
 
[[cpp/ranges#Range adaptor objects|RAO]],
 
[[cpp/memory/allocator_traits/select_on_container_copy_construction|SOCCC]],
 
[[cpp/memory/allocator_traits/select_on_container_copy_construction|SOCCC]],

Latest revision as of 11:11, 21 September 2024

 
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 – Multithread (C++11)
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
Constant expressions
Operators
    assignment – arithmetic
    increment and decrement
    logical – comparison
    member access
    call, comma, ternary
    sizeof – alignof (C++11)
    new – delete – typeid
    alternative representation
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

Conflicting declarations
Storage duration and linkage
Translation-unit-local (C++20)
Language linkage
Namespace declaration
Namespace alias
References – Pointers – Arrays
Structured bindings (C++17)
Enumerations and enumerators
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)
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/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
    function – class (CTAD) (C++17)
Explicit specialization – Partial specialization
Parameter packs (C++11)
sizeof... (C++11)
Fold expressions (C++17)
Pack indexing (C++26)
Dependent names – SFINAE
Constraints and concepts (C++20)
Requires expression (C++20)

Exceptions

try block
Throwing exceptions
Handling exceptions
Exception specification
    noexcept specification (C++11)
    Dynamic specification (until C++17*)
noexcept operator (C++11)

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

[edit] See also

C documentation for C language constructs
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/language&oldid=176352"