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2026-07-12 14:22:00 +04:00
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+#ifndef FACTORY_ABSTRACT_H
+#define FACTORY_ABSTRACT_H
+
+#include "../Function/abstract.h"
+#include "../Algorithm/abstract.h"
+
+BEGIN_NAMESPACE(BusinessLogic)
+BEGIN_NAMESPACE(Hash)
+BEGIN_NAMESPACE(Factory)
+
+class Abstract
+{
+public:
+    /* 
+    *  I used to use a constant link. This led to UB.
+    * 
+    *  https://eel.is/c++draft/class.temporary#6 (27.10.2021)
+    * 
+    *  The exceptions to this lifetime rule are:
+    *  (6.9) A temporary object bound to a reference parameter in a function call ([expr.call]) persists until the completion of the full-expression containing the call.
+    */
+    using AFC_type = std::shared_ptr<Function::Abstract::Creator>;
+    using AAC_type = std::shared_ptr<Algorithm::Abstract::Creator>;
+
+protected:
+    AFC_type m_functionCreator;
+    AAC_type m_algorithmCreator;
+
+protected:
+    Abstract(AFC_type functionCreator, AAC_type algorithmCreator)
+        : m_functionCreator(functionCreator), m_algorithmCreator(algorithmCreator)
+    {
+    }
+
+public:
+    using AFP_type = Function::Abstract::Product;
+    using AAP_type = Algorithm::Abstract::Product;
+
+public:
+    virtual const AFP_type            &getFunction()  const = 0;
+    virtual std::unique_ptr<AAP_type>  getAlgorithm() const = 0;
+};
+
+END_NAMESPACE // Factory
+END_NAMESPACE // Hash
+END_NAMESPACE // BusinessLogic
+
+#endif // !FACTORY_ABSTRACT_H