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std::is_compound

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< cpp‎ | types

 
 
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Escriba apoyo (basic types, RTTI, type traits)
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Objetos Function
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Operadores relacionales
Original:
Relational operators
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Pares y tuplas
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Pairs and tuples
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Cambiar, hacia adelante y mover
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Swap, forward and move
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Escriba apoyo
Tipos básicos
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Basic types
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Tipos fundamentales
Tipos fijos ancho enteros (C++11)
Límites numéricos
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Numeric limits
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C numérico limita interfaz
Información de tipo en tiempo de ejecución
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Runtime type information
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Caracteres de tipo
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Type traits
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Categorías primarias de tipo
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Primary type categories
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(C++11)
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(C++11)
is_compound
(C++11)
Propiedades de tipo
Original:
Type properties
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Operaciones compatibles
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Supported operations
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Relaciones y consultas de propiedad
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Relationships and property queries
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Modificaciones de tipo
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Type modifications
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Transformaciones de tipo
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Type transformations
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Escriba constantes rasgos
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Type trait constants
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Definido en la cabecera <type_traits>
template< class T >
struct is_compound;
(desde C++11)
Si T es un tipo compuesto (es decir, matriz, función, objeto puntero, puntero de función, el puntero del objeto miembro, puntero a función miembro, de referencia, de clase, unión o enumeración, incluidas las variantes cv-calificados), establece en el miembro constante value true iguales. Para cualquier otro tipo, es value false .
Original:
If T is a compound type (that is, array, function, object pointer, function pointer, member object pointer, member function pointer, reference, class, union, or enumeration, including any cv-qualified variants), provides the member constant value equal true. For any other type, value is false.
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Contenido

Inherited from std::integral_constant

Member constants

value
[estático]
true si T is a compound type , false lo contrario
Original:
true if T is a compound type , false otherwise
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(miembro público estático constante)

Member functions

operator bool
convierte el objeto a bool, devuelve value
Original:
converts the object to bool, returns value
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(función miembro público)

Member types

Tipo
Original:
Type
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Definition
value_type bool
type std::integral_constant<bool, value>

[editar] Notas

Tipos de compuestos son los tipos que son construidos de tipos fundamentales. Cualquier tipo C + + o es fundamental o compuesto .
Original:
Compound types are the types that are constructed from fundamental types. Any C++ type is either fundamental or compound.
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[editar] Posible implementación

template< class T >
struct is_compound : std::integral_constant<bool, !std::is_fundamental<T>::value> {};

[editar] Ejemplo

#include <iostream>
#include <type_traits>
 
int main() {
    class cls {};
    std::cout << (std::is_compound<cls>::value
                     ? "T is compound"
                     : "T is not a compound") << '\n';
    std::cout << (std::is_compound<int>::value
                     ? "T is compound"
                     : "T is not a compound") << '\n';
}

Salida:

T is compound
T is not a compound

[editar] Ver también

Comprueba si un tipo es el tipo fundamental
Original:
checks if a type is fundamental type
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(plantilla de clase) [editar]
(C++11)
Comprueba si un tipo es de tipo escalar
Original:
checks if a type is scalar type
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(plantilla de clase) [editar]
(C++11)
Comprueba si un tipo es tipo de objeto
Original:
checks if a type is object type
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(plantilla de clase) [editar]
(C++11)
Comprueba si un tipo es un tipo de matriz
Original:
checks if a type is an array type
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(plantilla de clase) [editar]