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      std::is_destructible, std::is_trivially_destructible, std::is_nothrow_destructible

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      < cpp‎ | types

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      C++
       
      Biblioteca de utilitários
      Digite apoio (basic types, RTTI, type traits)
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      Os operadores relacionais
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      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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      Troque, avançar e avançar
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      Swap, forward and move
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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
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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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      Propriedades de tipo
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      Type properties
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      Operações apoiadas
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      Supported operations
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      (C++11)(C++11)(C++11)
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      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      (C++11)(C++11)(C++11)
      is_destructibleis_trivially_destructibleis_nothrow_destructible
      (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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      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)
       
      Definido no cabeçalho <type_traits>
      template<class T >
      struct is_destructible;
      		 (1) (desde C++11)
      template<class T >
      struct is_trivially_destructible;
      		 (2) (desde C++11)
      template<class T >
      struct is_nothrow_destructible;
      		 (3) (desde C++11)
      1)
      Se uma estrutura imaginária contendo um objeto membro de T tipo tem um destrutor não-excluído, fornece o membro constante valuetrue igual. Para qualquer outro tipo, é valuefalse.
      Original:
      If an imaginary struct containing a member object of type T has a non-deleted destructor, provides the member constant value equal true. For any other type, value is false.
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      2)
      mesmo que 1), mas o processo de destruição não põe qualquer operação que não é trivial.
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      same as 1), but the destructor does not call any operation that is not trivial.
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      3)
      mesmo que 1), mas o processo de destruição é noexcept.
      Original:
      same as 1), but the destructor is noexcept.
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      Índice

      Herdado de std::integral_constant

      Member constants

      value
      [estática]
      true se T is destructible, false contrário
      Original:
      true if T is destructible, 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_typebool
      typestd::integral_constant<bool, value>

      [editar]Notas

      Porque o C + + programa termina se um destruidor lança uma exceção durante a pilha desenrolar (que normalmente não pode ser previsto), todos os destruidores práticas não são jogando mesmo se eles não são declarados noexcept. Todos os destruidores encontrados no C + + biblioteca padrão não são jogando.
      Original:
      Because the C++ program terminates if a destructor throws an exception during stack unwinding (which usually cannot be predicted), all practical destructors are non-throwing even if they are not declared noexcept. All destructors found in the C++ standard library are non-throwing.
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      [editar]Exemplo

      #include <iostream>#include <string>#include <type_traits>struct Foo {std::string str; ~Foo()noexcept{};};struct Bar { ~Bar()=default;};int main(){std::cout<<std::boolalpha<<"std::string is destructible? "<< std::is_destructible<std::string>::value<<'\n'<<"Foo is nothrow destructible? "<< std::is_nothrow_destructible<Foo>::value<<'\n'<<"Bar is trivally destructible? "<< std::is_trivially_destructible<Bar>::value<<'\n';}

      Saída: 

      std::string is destructible? true Foo is nothrow destructible? true Bar is trivally destructible? true

      [editar]Veja também

      (C++11)
      (C++11)
      (C++11)
      verifica se um tipo tem um construtor para argumentos específicos
      Original:
      checks if a type has a constructor for specific arguments
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      (modelo de classe)[edit]
      (C++11)
      verifica se um tipo tem um destrutor virtual
      Original:
      checks if a type has a virtual destructor
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      (modelo de classe)[edit]
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