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      Palavras-chave do C++: typename

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      <metanoindex/>

       
      C++
       
      Linguagem C++
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      decltype specifier (C++11)
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      (C++20)
       

      Uso

      • Numa modelo de classe ou modelo de função, typename pode ser usado como uma alternativa para classe declarar tipos templated.
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        In a modelo de classe or modelo de função, typename can be used as an alternative to classe to declare templated types.
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      • Dentro de uma definição de modelo, typename pode ser usado para declarar que um nome dependente é um tipo.
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        Inside a template definition, typename can be used to declare that a dependent name is a type.
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      Exemplo

      template <typename T>
void foo (const std::vector<T> &v)
{
    // std::vector<T>::const_iterator is a dependent name,
    // so using it as a type requires the addition of the
    // typename keyword
    typename std::vector<T>::const_iterator it = v.begin();
}