Espaços nominais
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      std::is_enum

      De cppreference.com

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      <metanoindex/>

       
      C++
       
      Biblioteca de utilitários
      Digite apoio (basic types, RTTI, type traits)
      Gerenciamento de memória dinâmica
      De tratamento de erros
      Utilidades do programa
      Variadic funções
      Data e hora
      Objetos de função
      (C++11)
      (C++11)
      Os operadores relacionais
      Original:
      Relational operators
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      rel_ops::operator!=
      rel_ops::operator>
      rel_ops::operator<=
      rel_ops::operator>=
      Pares e tuplas
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      Pairs and tuples
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      (C++11)
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      Troque, avançar e avançar
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      Swap, forward and move
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      (C++11)
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      Apoio a tipos
      Tipos básicos
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      Basic types
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      Tipos fundamentais
      Tipos inteiros de largura fixos (C++11)
      Limites numéricos
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      Numeric limits
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      C numérico limita interface
      Informações de tipo de tempo de execução
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      Runtime type information
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      Características de tipo
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      Type traits
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      Principais categorias de tipo
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      Primary type categories
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      (C++11)
      Propriedades de tipo
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      Type properties
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      (C++11)
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      (C++11)
      Operações apoiadas
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      Supported operations
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      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      (C++11)
      Relacionamentos e consultas de propriedade
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      Relationships and property queries
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      (C++11)
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      Tipo modificações
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      Type modifications
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      Transformações tipo
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      Type transformations
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      Digite constantes traço
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      Type trait constants
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      (C++11)
       
      <tbody> </tbody>
      Definido no cabeçalho <type_traits>
      template< class T > struct is_enum;
      		 (desde C++11)
      Se T é um tipo de enumeração, fornece o membro constante value true igual. Para qualquer outro tipo, é value false.
      Original:
      If T is an enumeration type, provides the member constant value equal true. For any other type, value is false.
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      Herdado de std::integral_constant

      Member constants

      value
      [estática]
      true se T is an enumeration type , false contrário
      Original:
      true if T is an enumeration type , false otherwise
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      (membro estático público constante)

      Member functions

      operator bool
      converte o objeto em bool, retorna value
      Original:
      converts the object to bool, returns value
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      (função pública membro)

      Member types

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

      Exemplo

      #include <iostream>
#include <type_traits>

class A {};

enum E {};

enum class Ec : int {};

int main() 
{
    std::cout << std::boolalpha;
    std::cout << std::is_enum<A>::value << '\n';
    std::cout << std::is_enum<E>::value << '\n';
    std::cout << std::is_enum<Ec>::value << '\n';
    std::cout << std::is_enum<int>::value << '\n';
}

      Saída: 

      false
true
true
false

      Veja também

      (C++11)
      verifica se um tipo é void
      Original:
      checks if a type is void
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      (modelo de classe) [edit]
      (C++11)
      verifica se um tipo é um tipo de ponteiro
      Original:
      checks if a type is a pointer type
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      (modelo de classe) [edit]
      (C++11)
      verifica se um tipo é o tipo de aritmética
      Original:
      checks if a type is arithmetic type
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      (modelo de classe) [edit]