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Pointer types - cppreference.com

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Sintaxe


cv type `*` cv identifier	(1)

return `( *` identifier `) (` param_types `)`	(2)

return `(` class_name `:: *` identifier `) (` param_types `)` cv_qualifier	(3)

type `&` identifier	(4)

type `&&` identifier	(5)	(desde C++11)

Explicação

# Ponteiro para dados

Original:

# Pointer to data

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# Ponteiro para funcionar

Original:

# Pointer to function

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# Ponteiro para função de membro

Original:

# Pointer to member function

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# Referência

Original:

# Reference

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# R valor de referência

Original:

# r-value reference

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Notas

Se cv é antes *, o objeto pontiagudo para é afetado.
Original:
If cv is before *, the pointed-to object is affected.
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Se cv é depois *, o ponteiro é afetado.
Original:
If cv is after *, the pointer is affected.
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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

Exemplo

#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);

}

Saída:

Member function: 1
object.data_member = 2
Member function: 3
Member function: 4
Static member function: 5
Global function: 6