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operators

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Lenguaje C++
Los temas generales
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General topics
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Control de flujo
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Flow control
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Sentencias condicionales ejecución
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Conditional execution statements
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Instrucciones de iteración
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Iteration statements
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Ir declaraciones
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Jump statements
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Funciones
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Functions
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declaración de la función
lambda declaración de la función
función de plantilla
especificador inline
especificaciones de excepción (obsoleto)
noexcept especificador (C++11)
Excepciones
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Exceptions
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Los espacios de nombres
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Namespaces
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Tipos
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Types
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decltype specifier (C++11)
Los especificadores
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Specifiers
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cv especificadores
almacenamiento duración especificadores
constexpr especificador (C++11)
auto especificador (C++11)
alignas especificador (C++11)
Inicialización
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Initialization
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Los literales
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Literals
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Expresiones
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Expressions
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representaciones alternativas
Utilidades
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Utilities
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Tipos
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Types
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typedef declaration
alias de tipo de declaración (C++11)
atributos (C++11)
Lanza
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Casts
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conversiones implícitas
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
C-cast estilo y funcional
De asignación de memoria
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Memory allocation
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Clases
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Classes
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Clase propiedades específicas de la función
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Class-specific function properties
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Funciones especiales miembro
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Special member functions
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Plantillas
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Templates
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clase de plantilla
función de plantilla
plantilla de especialización
paquetes de parámetros (C++11)
Varios
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Miscellaneous
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Montaje en línea
 

Contenido

[editar] Sobrecarga de operadores

[editar] Sintaxis

type operator op ( params ) ;

[editar] Explicación

  • <tipo> es / son el tipo (s) de las variables .
    Original:
    <type> is/are the type(s) of the variables.
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  • <op> es el operador en particular (por ejemplo, +, +=, <<, >>, &&, ||, %, etc) .
    Original:
    <op> is the particular operator (e.g. +, +=, <<, >>, &&, ||, %, etc.).
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  • <params> es / son el nombre (s) de los parámetros requeridos (depende del operador) .
    Original:
    <params> is/are the name(s) of the required parameters (depends on the operator).
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[editar] Restricciones

  • Usted no puede crear nuevos operadores como ** o &| .
    Original:
    You cannot create new operators such as ** or &|.
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  • No todos los operadores pueden ser sobrecargados
    Original:
    Not all operators can be overloaded
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  • Algunos operadores sólo se puede sobrecargar como miembros de la clase no estáticos
    Original:
    Some operators can only be overloaded as non-static class members
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  • Corto circuito de evaluación no funciona con operadores sobrecargados
    Original:
    Short-circuit evaluation doesn't work with overloaded operators
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[editar] Las llamadas del operador

Los operadores sobrecargados puede ser llamado usando la notación infija usual
Original:
Overloaded operators can be called using the usual infix notation
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a+b
o una función similar a la notación
Original:
or a function-like notation
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operator+(a,b)

[editar] Ejemplo

#include <iostream>
 using namespace std;
 
 class Fraction{
   private:
     int numerator, denominator;
 
   public:
     Fraction(int n, int d): numerator(n), denominator(d) {}
   // Note that the keyword operator combined with an actual
   // operator is used as the function name
   friend ostream& operator<<(ostream&, Fraction&);
 };
 
 ostream& operator<<(ostream& out, Fraction& f){
   out << f.numerator << '/' << f.denominator;
   return out;
 }
 
 int main(){
   Fraction f1(3, 8);
   Fraction f2(1, 2);
 
   cout << f1 << endl;
   cout << 3 << ' ' << f2 << endl;
 
   return 0;
 }

Output:

3/8
3 1/2

[editar] Vea también

Common operators
asignación incrementNJdecrement aritmética lógico comparación memberNJaccess otro

a = b
a = rvalue
a += b
a -= b
a *= b
a /= b
a %= b
a &= b
a |= b
a ^= b
a <<= b
a >>= b

++a
--a
a++
a--

+a
-a
a + b
a - b
a * b
a / b
a % b
~a
a & b
a | b
a ^ b
a << b
a >> b

!a
a && b
a || b

a == b
a != b
a < b
a > b
a <= b
a >= b

a[b]
*a
&a
a->b
a.b
a->*b
a.*b

a(...)
a, b
(type) a
? :

Special operators
static_cast convierte un tipo a otro tipo
compatible
Original:
static_cast converts one type to another compatible type
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dynamic_cast convierte clase base virtual a class
derivada
Original:
dynamic_cast converts virtual base class to derived class
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const_cast convierte un tipo a otro compatible con diferentes cv qualifiers
Original:
const_cast converts type to compatible type with different cv qualifiers
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reinterpret_cast convierte el tipo de type
incompatible
Original:
reinterpret_cast converts type to incompatible type
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new asigna memory
Original:
new allocates memory
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delete desasigna memory
Original:
delete deallocates memory
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sizeof consulta el tamaño de un type
Original:
sizeof queries the size of a type
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sizeof... consulta el tamaño de un parámetro de paquete (desde C++11)
Original:
sizeof... queries the size of a parámetro de paquete (desde C++11)
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typeid consulta la información de una type
Original:
typeid queries the type information of a type
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noexcept comprueba si una expresión puede lanzar una excepción (desde C++11)
Original:
noexcept checks if an expression can throw an exception (desde C++11)
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alignof consultas requisitos de alineación de un (desde C++11) tipo
Original:
alignof queries alignment requirements of a type (desde C++11)
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