Errors, bugs, questions - page 2664

[Sergey Dzyublik]

Stanislav Korotky:

Does anyone have this compiled?
What's wrong with it?

It's OK, come back for more:

class B {};

template<typename T>
class A
{
    static T *array;
    
    static void check(){
      T *ptr = array; 
    }
};

template<typename T>
static T *A::array;

class Y: public A<B>
{
};

void OnStart()
{
  Y y;
}

definition for static array has been moved above the creation of class Y.

[Aleksei Skrypnev]

Is it now possibleto run optimization+teston all symbols in the market review? Or only without optimization just run with the same parameters is done on the whole review?

That is, you can run a test not only with the same parameters for the symbols in the Market Watch, but optimize them at the same time? Otherwise, the selection of optimization parameters is blocked when all symbols are selected.

[fxsaber]

Askr:

Is it now possibleto run an optimisation+teston all the symbols in the market review?

https://www.mql5.com/ru/code/26132

[Aleksei Skrypnev]

fxsaber:

https://www.mql5.com/ru/code/26132

I think I read that this has already appeared in the standard tester?

I would like to know how to run your libraries, it's not clear. After all, you have to specify the Expert Advisor itself in the tester, but how do I launch the library?

Or, do you copy the skiyal to the terminal and everything works by itself?

[fxsaber]

Askr:

Or did you copy the scial into the terminal and everything works by itself?

Yes.

[[Deleted]]

Alexey Kozitsyn:
Unable to commit to storage...

Same problem again! Developers, please fix the storage! It's impossible to work with it. Common error.

[Stanislav Korotky]

Sergey Dzyublik:

It's OK, come again:

We're in touch. This code works:

class A
{
  protected:
    int field;

  public:
    A() { field = rand(); }
};

class B: public A
{
  public:
    B(A &origin)
    {
      field = origin.field;// это другой экземпляр, C++ дает ошибку 'int A::field' is protected
    }
    int getField(void) const
    {
      return field;
    }
};


void OnStart()
{
    A a;
    B b(a);
    Print(b.getField());
}

But according to C++ rules it should not allow access to protected (field of another object, albeit of the same class; protected denotes access only to inherited fields of the same object, while for access to alien fields it must be public). Is this a bug or a feature?

[Aleksey Mavrin]

Stanislav Korotky:

We turn. This is the code that works:

But according to C++ rules, it shouldn't allow access to protected at compile time. Is it a bug or a fix?

What do you mean it shouldn't? In what particular place? So your code is public inheritance (i.e. proctored members in descendants become public) and method is public.

s.w. rubbed my eyes, saw where, sorry)

[Sergey Dzyublik]

Stanislav Korotky:

We turn. This is the code that works:
But according to C++ rules, it shouldn't allow access to protected at compile time. Is this a bug or a fix?

Yes, C++ online swears:https://onlinegdb.com/Hkv1_13EU
That's up to the developers.

[Stanislav Korotky]

Sergey Dzyublik:

Yes, C++ online swears:https://onlinegdb.com/Hkv1_13EU
That's up to the developers.

Yes, let's listen to the developers. I have now taken advantage of this convenient hole. If they close it, I'll have to look for other ways.