Update Linker and Unlinker tool to use virtual functions directly instead of internal impl pointer

src/Linker/Linker.cpp

@@ -40,7 +40,7 @@ const IZoneCreator* const ZONE_CREATORS[]
     new T6::ZoneCreator()
 };
 
-class Linker::Impl
+class LinkerImpl final : public Linker
 {
     static constexpr const char* METADATA_GAME = "game";
     static constexpr const char* METADATA_GDT = "gdt";
@@ -543,13 +543,7 @@ class Linker::Impl
     }
 
 public:
-    Impl()
-    = default;
-
-    /**
-     * \copydoc Linker::Start
-     */
-    bool Start(const int argc, const char** argv)
+    bool Start(const int argc, const char** argv) override
     {
         if (!m_args.ParseArgs(argc, argv))
             return false;
@@ -576,18 +570,7 @@ public:
     }
 };
 
-Linker::Linker()
+std::unique_ptr<Linker> Linker::Create()
 {
-    m_impl = new Impl();
-}
-
-Linker::~Linker()
-{
-    delete m_impl;
-    m_impl = nullptr;
-}
-
-bool Linker::Start(const int argc, const char** argv) const
-{
-    return m_impl->Start(argc, argv);
+    return std::make_unique<LinkerImpl>();
 }

src/Linker/Linker.h

@@ -1,18 +1,19 @@
 #pragma once
 
+#include <memory>
+
 class Linker
 {
-    class Impl;
-    Impl* m_impl;
-
 public:
-    Linker();
-    ~Linker();
+    Linker() = default;
+    virtual ~Linker() = default;
 
-    Linker(const Linker& other) = delete;
-    Linker(Linker&& other) noexcept = delete;
-    Linker& operator=(const Linker& other) = delete;
-    Linker& operator=(Linker&& other) noexcept = delete;
+    Linker(const Linker& other) = default;
+    Linker(Linker&& other) noexcept = default;
+    Linker& operator=(const Linker& other) = default;
+    Linker& operator=(Linker&& other) noexcept = default;
+
+    static std::unique_ptr<Linker> Create();
 
     /**
      * \brief Starts the Linker application logic.
@@ -20,5 +21,5 @@ public:
      * \param argv The command line arguments.
      * \return \c true if the application was successful or \c false if an error occurred.
      */
-    bool Start(int argc, const char** argv) const;
-};
+    virtual bool Start(int argc, const char** argv) = 0;
+};

src/Linker/main.cpp

@@ -2,7 +2,7 @@
 
 int main(const int argc, const char** argv)
 {
-    Linker linker;
+    const auto linker = Linker::Create();
 
-    return linker.Start(argc, argv) ? 0 : 1;
+    return linker->Start(argc, argv) ? 0 : 1;
 }

src/Unlinker/Unlinker.cpp

@@ -34,7 +34,7 @@ const IZoneDefWriter* const ZONE_DEF_WRITERS[]
     new T6::ZoneDefWriter()
 };
 
-class Unlinker::Impl
+class UnlinkerImpl final : public Unlinker
 {
     UnlinkerArgs m_args;
     SearchPaths m_search_paths;
@@ -403,7 +403,7 @@ class Unlinker::Impl
             if (ShouldLoadObj())
             {
                 ObjLoading::LoadReferencedContainersForZone(&searchPathsForZone, zone.get());
-                ObjLoading::LoadObjDataForZone(&searchPathsForZone, zone.get()); 
+                ObjLoading::LoadObjDataForZone(&searchPathsForZone, zone.get());
             }
 
             if (!HandleZone(zone.get()))
@@ -421,15 +421,12 @@ class Unlinker::Impl
     }
 
 public:
-    Impl()
+    UnlinkerImpl()
     {
         m_last_zone_search_path = nullptr;
     }
 
-    /**
-     * \copydoc Unlinker::Start
-     */
-    bool Start(const int argc, const char** argv)
+    bool Start(const int argc, const char** argv) override
     {
         if (!m_args.ParseArgs(argc, argv))
             return false;
@@ -447,18 +444,7 @@ public:
     }
 };
 
-Unlinker::Unlinker()
+std::unique_ptr<Unlinker> Unlinker::Create()
 {
-    m_impl = new Impl();
-}
-
-Unlinker::~Unlinker()
-{
-    delete m_impl;
-    m_impl = nullptr;
-}
-
-bool Unlinker::Start(const int argc, const char** argv) const
-{
-    return m_impl->Start(argc, argv);
+    return std::make_unique<UnlinkerImpl>();
 }

src/Unlinker/Unlinker.h

@@ -1,18 +1,19 @@
 #pragma once
 
+#include <memory>
+
 class Unlinker
 {
-    class Impl;
-    Impl* m_impl;
-
 public:
-    Unlinker();
-    ~Unlinker();
+    Unlinker() = default;
+    virtual ~Unlinker() = default;
 
-    Unlinker(const Unlinker& other) = delete;
-    Unlinker(Unlinker&& other) noexcept = delete;
-    Unlinker& operator=(const Unlinker& other) = delete;
-    Unlinker& operator=(Unlinker&& other) noexcept = delete;
+    Unlinker(const Unlinker& other) = default;
+    Unlinker(Unlinker&& other) noexcept = default;
+    Unlinker& operator=(const Unlinker& other) = default;
+    Unlinker& operator=(Unlinker&& other) noexcept = default;
+
+    static std::unique_ptr<Unlinker> Create();
 
     /**
      * \brief Starts the Unlinker application logic.
@@ -20,5 +21,5 @@ public:
      * \param argv The command line arguments.
      * \return \c true if the application was successful or \c false if an error occurred.
      */
-    bool Start(int argc, const char** argv) const;
-};
+    virtual bool Start(int argc, const char** argv) = 0;
+};

src/Unlinker/main.cpp

@@ -2,7 +2,7 @@
 
 int main(const int argc, const char** argv)
 {
-    Unlinker unlinker;
+    const auto unlinker = Unlinker::Create();
 
-    return unlinker.Start(argc, argv) ? 0 : 1;
+    return unlinker->Start(argc, argv) ? 0 : 1;
 }