Question

Let’s say i’ve got a templated class called model. now let’s declare a class within this class called texture, that requires no template arguments. How do i go about defining it so that no matter the template argument given to the Model class, the texture object is the same. This is what it looks like.

template<class T>
class Model
{
    class Texture;
};

class Model::Texture //error because model requires a template argument.
{


};

so is there anything i can do here?

Answer 1

You should have to write that this way:

template<typename T>
class Model<T>::Texture 
{
  //you should be able to use T here, even though Texture is not a template!

   T m_data;   //T here
   Texture(T data); //T here also, as the constructor parameter!

};

As Model is a class template, so here T applies to Model only. Texture is still a non-template.

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