Add FX_OVERRIDE and use it for virtual functions of FX_FINAL classes.

core/src/fxcrt/extension.h

Index: core/src/fxcrt/extension.h
diff --git a/core/src/fxcrt/extension.h b/core/src/fxcrt/extension.h
index bb2a79b9f92ccae4e8ddc93119080750c9b9f238..c23a2e3369f2456f72243b9ae37937e46242c9f6 100644
--- a/core/src/fxcrt/extension.h
+++ b/core/src/fxcrt/extension.h
@@ -36,27 +36,27 @@ public:
             m_pFile->Release();
         }
     }
-    virtual IFX_FileStream*		Retain()
+    virtual IFX_FileStream*		Retain() FX_OVERRIDE
     {
         m_dwCount ++;
         return this;
     }
-    virtual void				Release()
+    virtual void				Release() FX_OVERRIDE
     {
         FX_DWORD nCount = -- m_dwCount;
         if (!nCount) {
             delete this;
         }
     }
-    virtual FX_FILESIZE			GetSize()
+    virtual FX_FILESIZE			GetSize() FX_OVERRIDE
     {
         return m_bUseRange ? m_nSize : m_pFile->GetSize();
     }
-    virtual FX_BOOL				IsEOF()
+    virtual FX_BOOL				IsEOF() FX_OVERRIDE
     {
         return GetPosition() >= GetSize();
     }
-    virtual FX_FILESIZE			GetPosition()
+    virtual FX_FILESIZE			GetPosition() FX_OVERRIDE
     {
         FX_FILESIZE pos = m_pFile->GetPosition();
         if (m_bUseRange) {
@@ -64,7 +64,7 @@ public:
         }
         return pos;
     }
-    virtual FX_BOOL				SetRange(FX_FILESIZE offset, FX_FILESIZE size)
+    virtual FX_BOOL				SetRange(FX_FILESIZE offset, FX_FILESIZE size) FX_OVERRIDE
     {
         if (offset < 0 || size < 0) {
             return FALSE;
@@ -82,11 +82,11 @@ public:
         m_pFile->SetPosition(m_nOffset);
         return TRUE;
     }
-    virtual void				ClearRange()
+    virtual void				ClearRange() FX_OVERRIDE
     {
         m_bUseRange = FALSE;
     }
-    virtual FX_BOOL				ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)
+    virtual FX_BOOL				ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) FX_OVERRIDE
     {
         if (m_bUseRange && offset < 0) {
             return FALSE;
@@ -101,7 +101,7 @@ public:
         }
         return (FX_BOOL)m_pFile->ReadPos(buffer, size, pos.ValueOrDie());
     }
-    virtual size_t				ReadBlock(void* buffer, size_t size)
+    virtual size_t				ReadBlock(void* buffer, size_t size) FX_OVERRIDE
     {
         if (m_bUseRange) {
             FX_FILESIZE availSize = m_nOffset + m_nSize - m_pFile->GetPosition();
@@ -111,14 +111,14 @@ public:
         }
         return m_pFile->Read(buffer, size);
     }
-    virtual	FX_BOOL				WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size)
+    virtual	FX_BOOL				WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size) FX_OVERRIDE
     {
         if (m_bUseRange) {
             offset += m_nOffset;
         }
         return (FX_BOOL)m_pFile->WritePos(buffer, size, offset);
     }
-    virtual FX_BOOL				Flush()
+    virtual FX_BOOL				Flush()  FX_OVERRIDE
     {
         return m_pFile->Flush();
     }
@@ -164,12 +164,12 @@ public:
         }
         m_Blocks.RemoveAll();
     }
-    virtual IFX_FileStream*		Retain()
+    virtual IFX_FileStream*		Retain()  FX_OVERRIDE
     {
         m_dwCount ++;
         return this;
     }
-    virtual void				Release()
+    virtual void				Release()  FX_OVERRIDE
     {
         FX_DWORD nCount = -- m_dwCount;
         if (nCount) {
@@ -177,15 +177,15 @@ public:
         }
         delete this;
     }
-    virtual FX_FILESIZE			GetSize()
+    virtual FX_FILESIZE			GetSize()  FX_OVERRIDE
     {
         return m_bUseRange ? (FX_FILESIZE) m_nSize : (FX_FILESIZE)m_nCurSize;
     }
-    virtual FX_BOOL				IsEOF()
+    virtual FX_BOOL				IsEOF()  FX_OVERRIDE
     {
         return m_nCurPos >= (size_t)GetSize();
     }
-    virtual FX_FILESIZE			GetPosition()
+    virtual FX_FILESIZE			GetPosition()  FX_OVERRIDE
     {
         FX_FILESIZE pos = (FX_FILESIZE)m_nCurPos;
         if (m_bUseRange) {
@@ -193,7 +193,7 @@ public:
         }
         return pos;
     }
-    virtual FX_BOOL				SetRange(FX_FILESIZE offset, FX_FILESIZE size)
+    virtual FX_BOOL				SetRange(FX_FILESIZE offset, FX_FILESIZE size)  FX_OVERRIDE
     {
         if (offset < 0 || size < 0) {
             return FALSE;
@@ -209,11 +209,11 @@ public:
         m_nCurPos = m_nOffset;
         return TRUE;
     }
-    virtual void				ClearRange()
+    virtual void				ClearRange()  FX_OVERRIDE
     {
         m_bUseRange = FALSE;
     }
-    virtual FX_BOOL				ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)
+    virtual FX_BOOL				ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)  FX_OVERRIDE
     {
         if (!buffer || !size) {
             return FALSE;
@@ -256,7 +256,7 @@ public:
         }
         return TRUE;
     }
-    virtual size_t				ReadBlock(void* buffer, size_t size)
+    virtual size_t				ReadBlock(void* buffer, size_t size)  FX_OVERRIDE
     {
         if (m_nCurPos >= m_nCurSize) {
             return 0;
@@ -273,7 +273,7 @@ public:
         }
         return nRead;
     }
-    virtual	FX_BOOL				WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size)
+    virtual	FX_BOOL				WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size)  FX_OVERRIDE
     {
         if (!buffer || !size) {
             return FALSE;
@@ -333,15 +333,15 @@ public:
         }
         return TRUE;
     }
-    virtual FX_BOOL				Flush()
+    virtual FX_BOOL				Flush()  FX_OVERRIDE
     {
         return TRUE;
     }
-    virtual FX_BOOL				IsConsecutive() const
+    virtual FX_BOOL				IsConsecutive() const  FX_OVERRIDE
     {
         return m_dwFlags & FX_MEMSTREAM_Consecutive;
     }
-    virtual void				EstimateSize(size_t nInitSize, size_t nGrowSize)
+    virtual void				EstimateSize(size_t nInitSize, size_t nGrowSize)  FX_OVERRIDE
     {
         if (m_dwFlags & FX_MEMSTREAM_Consecutive) {
             if (m_Blocks.GetSize() < 1) {
@@ -355,11 +355,11 @@ public:
             m_nGrowSize = FX_MAX(nGrowSize, 4096);
         }
     }
-    virtual FX_LPBYTE			GetBuffer() const
+    virtual FX_LPBYTE			GetBuffer() const  FX_OVERRIDE
     {
         return m_Blocks.GetSize() ? (FX_LPBYTE)m_Blocks[0] : NULL;
     }
-    virtual void				AttachBuffer(FX_LPBYTE pBuffer, size_t nSize, FX_BOOL bTakeOver = FALSE)
+    virtual void				AttachBuffer(FX_LPBYTE pBuffer, size_t nSize, FX_BOOL bTakeOver = FALSE)  FX_OVERRIDE
     {
         if (!(m_dwFlags & FX_MEMSTREAM_Consecutive)) {
             return;
@@ -371,7 +371,7 @@ public:
         m_dwFlags = FX_MEMSTREAM_Consecutive | (bTakeOver ? FX_MEMSTREAM_TakeOver : 0);
         ClearRange();
     }
-    virtual void				DetachBuffer()
+    virtual void				DetachBuffer()  FX_OVERRIDE
     {
         if (!(m_dwFlags & FX_MEMSTREAM_Consecutive)) {
             return;