Errors, bugs, questions - page 1434

[A100]

Compilation error:'<' - template mismatch

template<typename T>
class A {
        T t;
};
class B {
                        B() : a( new A<int> ) {} //Error: <' - template mismatch
        A<int> * const a;
};

[Alexander]

A100:

Compilation error:'<' - template mismatch

Thank you, we are sorting it out.

[A100]

You can't specify the full name for constructor and destructor within a declaration, whereas you can for methods (and why are the former worse?)

class A {
        void A::f() {}     //нормально
               A::A() {}  //Error: '::' - name expected
        virtual A::~A() {} //Error: '::' - name expected
};

Why is this necessary? - it turned out to be the only way to separate declaration and implementation in templates.

[Aleksandr Novikov]

Do something about the order closing window.
The order numbers are not fully visible. When you change the width of a column, it is not fixed and narrows back. And the window itself cannot be stretched.

[Yury Kirillov]

Unable to output the fifth digit with SetLevelValue()

//+------------------------------------------------------------------+
//|                                               Ind_TickTest01.mq4 |
//|                        Copyright 2015, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2015, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_separate_window
#property indicator_buffers 2
//-----
double   Buffer0[];
double   Buffer1[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
   IndicatorSetInteger(INDICATOR_DIGITS,8);
   SetIndexBuffer(0,Buffer0);
   SetIndexBuffer(1,Buffer1);
//-----
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
   IndicatorShortName("Ind Bid NO 5-ZNAK!!! >>"+DoubleToString(Bid,_Digits));
   Buffer0[0]=Bid-0.00015;
   Buffer1[0]=Bid+0.00015;
   SetLevelValue(0,Bid-0.0001);
   SetLevelValue(1,Bid-0.00005);
   SetLevelValue(2,Bid);
   SetLevelValue(3,Bid+0.00005);
   SetLevelValue(4,Bid+0.0001);
   return(rates_total);
  }
//+------------------------------------------------------------------+

Result:

[TheXpert]

IndicatorDigits. I don't know what it's called at the moment. I think someone might be able to tell me.

[Artyom Trishkin]

Комбинатор:
IndicatorDigits. Now I don't know what it's called. I think someone will tell me.

That must be it ;)

IndicatorSetInteger(INDICATOR_DIGITS,Digits());

[Yury Kirillov]

Artyom Trishkin:

That must be it ;)

Tried it - doesn't help.

//+------------------------------------------------------------------+
//|                                               Ind_TickTest01.mq4 |
//|                        Copyright 2015, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2015, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_separate_window
#property indicator_buffers 2
//----- indicator_levelN
double   Buffer0[];
double   Buffer1[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
   IndicatorSetInteger(INDICATOR_DIGITS,5);
   SetIndexBuffer(0,Buffer0);
   SetIndexBuffer(1,Buffer1);
//-----
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
   IndicatorShortName("Ind Bid NO 5-ZNAK!!! >>"+DoubleToString(Bid,_Digits));
   Buffer0[0]=Bid-0.00015;
   Buffer1[0]=Bid+0.00015;
   SetLevelValue(0,Bid-0.0001);
   SetLevelValue(1,Bid-0.000075);
   SetLevelValue(2,Bid-0.00005);
   SetLevelValue(3,Bid-0.000025);
   SetLevelValue(4,Bid);
   SetLevelValue(5,Bid+0.000025);
   SetLevelValue(6,Bid+0.00005);
   SetLevelValue(7,Bid+0.000075);
   SetLevelValue(8,Bid+0.0001);
   return(rates_total);
  }
//+------------------------------------------------------------------+

[Yury Kirillov]

Yury Kirillov:

Tried it - it doesn't work.

Response SD:

Support Team2015.11.20 14:33

In fours, the levels are output to 4 digits accuracy.

No one used to pay attention to this. That's why this place hasn't been touched until now.

Let's make it output with Digits indicator accuracy

[A100]

Compilation error

struct A {
        int a1;
        int a2;
};
struct B {
        static A a;
        static int b1;
        static int b2;
        static int b3;
};
A B::a = { 2, 3 };
int B::b1 = 1;
int B::b2 = B::b1;   //нормально
int B::b3 = B::a.a2; //'a2' - non-static members and methods cannot be used

It is sufficient that B::a is static