Pointer types
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Syntaxe
cv type * cv identifier
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(1) | ||||||||
return ( * identifier ) ( param_types )
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(2) | ||||||||
return ( class_name :: * identifier ) ( param_types ) cv_qualifier
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(3) | ||||||||
type & identifier
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(4) | ||||||||
type && identifier
|
(5) | (depuis C++11) | |||||||
Explication
# Pointeur de donnes
Original:
# Pointer to data
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# Pointeur pour fonctionner
Original:
# Pointer to function
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Pointeur # membre de fonction
Original:
# Pointer to member function
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# De rfrence
Original:
# Reference
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# R-valeur de rfrence
Original:
# r-value reference
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Notes
- Si cv est avant
*, l'objet point est affecte .Original:If cv is before*, the pointed-to object is affected.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Si cv est aprs
*, le pointeur est affect .Original:If cv is after*, the pointer is affected.The text has been machine-translated via Google Translate.
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| Syntax | meaning |
|---|---|
const T * |
pointer to constant object |
T const * |
pointer to constant object |
T * const |
constant pointer to object |
const T * const |
constant pointer to constant object |
const T & |
reference to constant object |
Exemple
#include <iostream>
struct Class
{
int data_member;
void member_function(int i) const
{
std::cout << "Member function: " << i << std::endl;
}
static void static_member_function ( int i )
{
std::cout << "Static member function: " << i << std::endl;
}
};
void global_function ( int i )
{
std::cout << "Global function: " << i << std::endl;
}
int main()
{
Class object;
Class *ptr = &object;
ptr->member_function(1);
Class &ref = object;
ref.data_member = 2;
std::cout << "object.data_member = " << object.data_member << std::endl;
void (Class::*ptr_to_memfun)(int) const = &Class::member_function;
(object.*ptr_to_memfun)(3);
(ptr->*ptr_to_memfun)(4);
void (*ptr_to_fun)(int) = Class::static_member_function;
ptr_to_fun(5);
ptr_to_fun = global_function;
ptr_to_fun(6);
}
Rsultat :
Member function: 1
object.data_member = 2
Member function: 3
Member function: 4
Static member function: 5
Global function: 6