85 lines
2.6 KiB
MQL5
85 lines
2.6 KiB
MQL5
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//+------------------------------------------------------------------+
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//| TemplatesAutoPtr.mq5 |
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//| Copyright (c) 2019, Marketeer |
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//| https://www.mql5.com/en/users/marketeer |
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//+------------------------------------------------------------------+
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#define DEBUG_PRINT
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#include "..\..\Include\AutoPtr.mqh"
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//+------------------------------------------------------------------+
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//| Dummy class |
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//+------------------------------------------------------------------+
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class Dummy
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{
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int x;
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public:
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Dummy(int i) : x(i)
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{
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Print(__FUNCSIG__, " ", &this);
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}
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~Dummy()
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{
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Print(__FUNCSIG__, " ", &this);
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}
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int value() const
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{
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return x;
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}
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};
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//+------------------------------------------------------------------+
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//| Derived class to handle by AutoPtr<Dummy> as well |
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//+------------------------------------------------------------------+
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class Gummy : public Dummy
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{
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public:
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Gummy(int i) : Dummy(-i) { }
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};
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//+------------------------------------------------------------------+
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//| Template specification/instantiation via inheritance |
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//+------------------------------------------------------------------+
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class DummyPtr : AutoPtr<Dummy>
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{
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};
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//+------------------------------------------------------------------+
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//| Test struct |
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//+------------------------------------------------------------------+
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struct XYZ
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{
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int x;
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};
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//+------------------------------------------------------------------+
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//| Fabric function |
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//+------------------------------------------------------------------+
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AutoPtr<Dummy> generator()
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{
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AutoPtr<Dummy> ptr(new Dummy(1));
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ptr = new Dummy(2);
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return ptr;
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}
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//+------------------------------------------------------------------+
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//| Script program start function |
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//+------------------------------------------------------------------+
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void OnStart()
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{
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AutoPtr<Dummy> ptr = generator();
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Print(ptr[].value()); // 2
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// OK: can manage derived objects
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// AutoPtr<Dummy> ptr2 = new Gummy(10);
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// ERRORS:
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// 'ptr' - parameter conversion not allowed
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// 'ptr' - object pointer expected
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// '*' - pointer cannot be used
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// AutoPtr<string> s;
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}
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//+------------------------------------------------------------------+
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