std::pointer_traits::pointer_to - cppreference.com
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      std::pointer_traits::pointer_to

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      C++
       
      Gerenciamento de memória dinâmica
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      Alocadores
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      Allocators
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      Uninitialized storage
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      Ponteiros inteligentes
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      Smart pointers
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      (obsoleta)
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      Apoio a coleta de lixo
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      Garbage collection support
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      Diversos
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      Miscellaneous
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      C Library
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      std::pointer_traits
      Funções de membro
      Original:
      Member functions
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      pointer_traits::pointer_to
       
      <tbody> </tbody>
      Definido no cabeçalho <memory>
      static pointer pointer_traits<Ptr>::pointer_to(element_type& r );
      		 (desde C++11)
      <tbody> </tbody>
      static pointer pointer_traits<T*>::pointer_to(element_type& r);
      		 (desde C++11)
      Constrói um ponteiro dereferenceable ao seu argumento.
      Original:
      Constructs a dereferenceable pointer to its argument.
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      1)
      A versão desta função no modelo std::pointer_traits não especializado simplesmente chama Ptr::pointer_to(r), e se Ptr não fornece uma função de membro estático pointer_to instanciação, desta função é um erro de tempo de compilação.
      Original:
      The version of this function in the non-specialized std::pointer_traits template simply calls Ptr::pointer_to(r), and if Ptr does not provide a static member function pointer_to, instantiation of this function is a compile-time error.
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      2)
      A versão desta função na especialização de std::pointer_traits para tipos de ponteiro retorna std::addressof(r)
      Original:
      The version of this function in the specialization of std::pointer_traits for pointer types returns std::addressof(r)
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      Parâmetros

      r -
      referência a um objecto de tipo element_type&, excepto se for ELEMENT_TYPE void, caso em que o tipo de r não é especificado
      Original:
      reference to an object of type element_type&, except if element_type is void, in which case the type of r is unspecified
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      Valor de retorno

      Um ponteiro dereferenceable para r, do pointer_traits tipo <> :: ponteiro.
      Original:
      A dereferenceable pointer to r, of the type pointer_traits<>::pointer.
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      Exceções

      1)

      Não especificado (tipicamente igual Ptr::pointer_to)
      Original:
      Unspecified (typically same as Ptr::pointer_to)
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      2)

      noexcept specification:  
      <tbody> </tbody>
      noexcept
        (desde C++11)

      Notas

      O boost library version desta função retorna pointer(std::addressof(r)) se Ptr :: pointer_to não existe.
      Original:
      The boost library version of this function returns pointer(std::addressof(r)) if Ptr::pointer_to does not exist.
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