Allow wxAutomationObject::GetInstance() create new instance if needed.

[wxWidgets.git] / include / wx / any.h

diff --git a/include/wx/any.h b/include/wx/any.h
index 0784b66480e9e0bc18e236a274230ca1673bcd90..092e71078d7a16a487b045ed3aa3fb732fa90b5c 100644 (file)
--- a/include/wx/any.h
+++ b/include/wx/any.h
@@ -16,9 +16,10 @@
 
 #if wxUSE_ANY
 
 
 #if wxUSE_ANY
 

+#include <new> // for placement new

 #include "wx/string.h"
 #include "wx/string.h"

-#include "wx/meta/movable.h"

 #include "wx/meta/if.h"
 #include "wx/meta/if.h"

+#include "wx/typeinfo.h"

 
 
 // Size of the wxAny value buffer.
 
 
 // Size of the wxAny value buffer.


@@ -43,9 +44,6 @@ union wxAnyValueBuffer
     wxByte  m_buffer[WX_ANY_VALUE_BUFFER_SIZE];
 };
 
     wxByte  m_buffer[WX_ANY_VALUE_BUFFER_SIZE];
 };
 

-typedef void (*wxAnyClassInfo)();
-
-

 //
 // wxAnyValueType is base class for value type functionality for C++ data
 // types used with wxAny. Usually the default template (wxAnyValueTypeImpl<>)
 //
 // wxAnyValueType is base class for value type functionality for C++ data
 // types used with wxAny. Usually the default template (wxAnyValueTypeImpl<>)


@@ -53,11 +51,14 @@ typedef void (*wxAnyClassInfo)();
 //
 class WXDLLIMPEXP_BASE wxAnyValueType
 {
 //
 class WXDLLIMPEXP_BASE wxAnyValueType
 {

+    WX_DECLARE_ABSTRACT_TYPEINFO(wxAnyValueType)

 public:
     /**
         Default constructor.
     */
 public:
     /**
         Default constructor.
     */

-    wxAnyValueType();
+    wxAnyValueType()
+    {
+    }

 
     /**
         Destructor.
 
     /**
         Destructor.


@@ -66,11 +67,6 @@ public:
     {
     }
 
     {
     }
 

-    /**
-        This function is used for internal type matching.
-    */
-    virtual wxAnyClassInfo GetClassInfo() const = 0;
-

     /**
         This function is used for internal type matching.
     */
     /**
         This function is used for internal type matching.
     */


@@ -116,53 +112,72 @@ public:
     */
     // FIXME-VC6: remove this hack when VC6 is no longer supported
     template <typename T>
     */
     // FIXME-VC6: remove this hack when VC6 is no longer supported
     template <typename T>

-    bool CheckType(T* reserved = NULL);
+    bool CheckType(T* reserved = NULL) const;
+private:
+};
+
+
+//
+// We need to allocate wxAnyValueType instances in heap, and need to use
+// scoped ptr to properly deallocate them in dynamic library use cases.
+// Here we have a minimal specialized scoped ptr implementation to deal
+// with various compiler-specific problems with template class' static
+// member variable of template type with explicit constructor which
+// is initialized in global scope.
+//
+class wxAnyValueTypeScopedPtr
+{
+public:
+    wxAnyValueTypeScopedPtr(wxAnyValueType* ptr) : m_ptr(ptr) { }
+    ~wxAnyValueTypeScopedPtr() { delete m_ptr; }
+    wxAnyValueType* get() const { return m_ptr; }

 private:
 private:

+    wxAnyValueType* m_ptr;

 };
 
 };
 

+

 //
 // This method of checking the type is compatible with VC6
 #define wxANY_VALUE_TYPE_CHECK_TYPE(valueTypePtr, T) \
     wxAnyValueTypeImpl<T>::IsSameClass(valueTypePtr)
 
 //
 // This method of checking the type is compatible with VC6
 #define wxANY_VALUE_TYPE_CHECK_TYPE(valueTypePtr, T) \
     wxAnyValueTypeImpl<T>::IsSameClass(valueTypePtr)
 

-    //valueTypePtr->CheckType(static_cast<T*>(NULL))
-

 
 /**
     Helper macro for defining user value types.
 
 
 /**
     Helper macro for defining user value types.
 

-    NB: We really cannot compare sm_classInfo directly in IsSameClass(),
-        but instead call sm_instance->GetClassInfo(). The former technique
-        broke at least on GCC 4.2 (but worked on VC8 shared build).
+    Even though C++ RTTI would be fully available to use, we'd have to to
+    facilitate sub-type system which allows, for instance, wxAny with
+    signed short '15' to be treated equal to wxAny with signed long long '15'.
+    Having sm_instance is important here.
+
+    NB: We really need to have wxAnyValueType instances allocated
+        in heap. They are stored as static template member variables,
+        and with them we just can't be too careful (eg. not allocating
+        them in heap broke the type identification in GCC).

 */
 #define WX_DECLARE_ANY_VALUE_TYPE(CLS) \
     friend class wxAny; \
 */
 #define WX_DECLARE_ANY_VALUE_TYPE(CLS) \
     friend class wxAny; \

+    WX_DECLARE_TYPEINFO_INLINE(CLS) \

 public: \
 public: \

-    static void sm_classInfo() {} \
- \
-    virtual wxAnyClassInfo GetClassInfo() const \
-    { \
-        return sm_classInfo; \
-    } \

     static bool IsSameClass(const wxAnyValueType* otherType) \
     { \
     static bool IsSameClass(const wxAnyValueType* otherType) \
     { \

-        return sm_instance->GetClassInfo() == otherType->GetClassInfo(); \
+        return wxTypeId(*sm_instance.get()) == wxTypeId(*otherType); \

     } \
     virtual bool IsSameType(const wxAnyValueType* otherType) const \
     { \
         return IsSameClass(otherType); \
     } \
 private: \
     } \
     virtual bool IsSameType(const wxAnyValueType* otherType) const \
     { \
         return IsSameClass(otherType); \
     } \
 private: \

-    static CLS* sm_instance; \
+    static wxAnyValueTypeScopedPtr sm_instance; \

 public: \
     static wxAnyValueType* GetInstance() \
     { \
 public: \
     static wxAnyValueType* GetInstance() \
     { \

-        return sm_instance; \
+        return sm_instance.get(); \

     }
 
 
 #define WX_IMPLEMENT_ANY_VALUE_TYPE(CLS) \
     }
 
 
 #define WX_IMPLEMENT_ANY_VALUE_TYPE(CLS) \

-    CLS* CLS::sm_instance = new CLS();
+wxAnyValueTypeScopedPtr CLS::sm_instance(new CLS());

 
 
 #ifdef __VISUALC6__
 
 
 #ifdef __VISUALC6__


@@ -178,23 +193,33 @@ namespace wxPrivate
 {
 
 template<typename T>
 {
 
 template<typename T>

-class wxAnyValueTypeOpsMovable
+class wxAnyValueTypeOpsInplace

 {
 public:
     static void DeleteValue(wxAnyValueBuffer& buf)
     {
 {
 public:
     static void DeleteValue(wxAnyValueBuffer& buf)
     {

-        wxUnusedVar(buf);
+        T* value = reinterpret_cast<T*>(&buf.m_buffer[0]);
+        value->~T();
+
+        // Some compiler may given 'unused variable' warnings without this
+        wxUnusedVar(value);

     }
 
     static void SetValue(const T& value,
                          wxAnyValueBuffer& buf)
     {
     }
 
     static void SetValue(const T& value,
                          wxAnyValueBuffer& buf)
     {

-        memcpy(buf.m_buffer, &value, sizeof(T));
+        // Use placement new
+        void* const place = buf.m_buffer;
+        ::new(place) T(value);

     }
 
     static const T& GetValue(const wxAnyValueBuffer& buf)
     {
     }
 
     static const T& GetValue(const wxAnyValueBuffer& buf)
     {

-        return *(reinterpret_cast<const T*>(&buf.m_buffer[0]));
+        // Breaking this code into two lines should supress
+        // GCC's 'type-punned pointer will break strict-aliasing rules'
+        // warning.
+        const T* value = reinterpret_cast<const T*>(&buf.m_buffer[0]);
+        return *value;

     }
 };
 
     }
 };
 


@@ -251,9 +276,8 @@ public:
 template<typename T>
 class wxAnyValueTypeImplBase : public wxAnyValueType
 {
 template<typename T>
 class wxAnyValueTypeImplBase : public wxAnyValueType
 {

-    typedef typename wxIf< wxIsMovable<T>::value &&
-                                sizeof(T) <= WX_ANY_VALUE_BUFFER_SIZE,
-                           wxPrivate::wxAnyValueTypeOpsMovable<T>,
+    typedef typename wxIf< sizeof(T) <= WX_ANY_VALUE_BUFFER_SIZE,
+                           wxPrivate::wxAnyValueTypeOpsInplace<T>,

                            wxPrivate::wxAnyValueTypeOpsGeneric<T> >::value
             Ops;
 
                            wxPrivate::wxAnyValueTypeOpsGeneric<T> >::value
             Ops;
 


@@ -317,8 +341,7 @@ public:
 };
 
 template<typename T>
 };
 
 template<typename T>

-wxAnyValueTypeImpl<T>* wxAnyValueTypeImpl<T>::sm_instance =
-    new wxAnyValueTypeImpl<T>();
+wxAnyValueTypeScopedPtr wxAnyValueTypeImpl<T>::sm_instance = new wxAnyValueTypeImpl<T>();

 
 
 //
 
 
 //


@@ -335,13 +358,17 @@ public: \
     virtual ~wxAnyValueTypeImpl() { } \
     static void SetValue(const T& value, wxAnyValueBuffer& buf) \
     { \
     virtual ~wxAnyValueTypeImpl() { } \
     static void SetValue(const T& value, wxAnyValueBuffer& buf) \
     { \

-        *(reinterpret_cast<UseDataType*>(&buf.m_buffer[0])) = \
-            static_cast<UseDataType>(value); \
+        void* voidPtr = reinterpret_cast<void*>(&buf.m_buffer[0]); \
+        UseDataType* dptr = reinterpret_cast<UseDataType*>(voidPtr); \
+        *dptr = static_cast<UseDataType>(value); \

     } \
     static T GetValue(const wxAnyValueBuffer& buf) \
     { \
     } \
     static T GetValue(const wxAnyValueBuffer& buf) \
     { \

-        return static_cast<T>( \
-            *(reinterpret_cast<const UseDataType*>(&buf.m_buffer[0]))); \
+        const void* voidPtr = \
+            reinterpret_cast<const void*>(&buf.m_buffer[0]); \
+        const UseDataType* sptr = \
+            reinterpret_cast<const UseDataType*>(voidPtr); \
+        return static_cast<T>(*sptr); \

     } \
 };
 
     } \
 };
 


@@ -407,35 +434,55 @@ WX_ANY_DEFINE_SUB_TYPE(wxULongLong_t, Uint)
 
 
 //
 
 
 //

-// String value type
+// This macro is used in header, but then in source file we must have:
+// WX_IMPLEMENT_ANY_VALUE_TYPE(wxAnyValueTypeImpl##TYPENAME)

 //
 //

-class WXDLLIMPEXP_BASE wxAnyValueTypeImplString :
-    public wxAnyValueTypeImplBase<wxString>
-{
-    WX_DECLARE_ANY_VALUE_TYPE(wxAnyValueTypeImplString)
-public:
-    wxAnyValueTypeImplString() :
-        wxAnyValueTypeImplBase<wxString>() { }
-    virtual ~wxAnyValueTypeImplString() { }
+#define _WX_ANY_DEFINE_CONVERTIBLE_TYPE(T, TYPENAME, CONVFUNC, GV) \
+class WXDLLIMPEXP_BASE wxAnyValueTypeImpl##TYPENAME : \
+    public wxAnyValueTypeImplBase<T> \
+{ \
+    WX_DECLARE_ANY_VALUE_TYPE(wxAnyValueTypeImpl##TYPENAME) \
+public: \
+    wxAnyValueTypeImpl##TYPENAME() : \
+        wxAnyValueTypeImplBase<T>() { } \
+    virtual ~wxAnyValueTypeImpl##TYPENAME() { } \
+    virtual bool ConvertValue(const wxAnyValueBuffer& src, \
+                              wxAnyValueType* dstType, \
+                              wxAnyValueBuffer& dst) const \
+    { \
+        GV value = GetValue(src); \
+        return CONVFUNC(value, dstType, dst); \
+    } \
+}; \
+template<> \
+class wxAnyValueTypeImpl<T> : public wxAnyValueTypeImpl##TYPENAME \
+{ \
+public: \
+    wxAnyValueTypeImpl() : wxAnyValueTypeImpl##TYPENAME() { } \
+    virtual ~wxAnyValueTypeImpl() { } \
+};

 
 

-    /**
-        Convert value into buffer of different type. Return false if
-        not possible.
-    */
-    virtual bool ConvertValue(const wxAnyValueBuffer& src,
-                              wxAnyValueType* dstType,
-                              wxAnyValueBuffer& dst) const;
+#define WX_ANY_DEFINE_CONVERTIBLE_TYPE(T, TYPENAME, CONVFUNC, BT) \
+_WX_ANY_DEFINE_CONVERTIBLE_TYPE(T, TYPENAME, CONVFUNC, BT) \

 
 

-};
+#define WX_ANY_DEFINE_CONVERTIBLE_TYPE_BASE(T, TYPENAME, CONVFUNC) \
+_WX_ANY_DEFINE_CONVERTIBLE_TYPE(T, TYPENAME, \
+                                CONVFUNC, const T&) \

 
 

-template<>
-class wxAnyValueTypeImpl<wxString> : public wxAnyValueTypeImplString
-{
-public:
-    wxAnyValueTypeImpl() : wxAnyValueTypeImplString() { }
-    virtual ~wxAnyValueTypeImpl() { }
-};
+//
+// String value type
+//
+
+// Convert wxString to destination wxAny value type
+extern WXDLLIMPEXP_BASE bool wxAnyConvertString(const wxString& value,
+                                                wxAnyValueType* dstType,
+                                                wxAnyValueBuffer& dst);

 
 

+WX_ANY_DEFINE_CONVERTIBLE_TYPE_BASE(wxString, wxString, wxAnyConvertString)
+WX_ANY_DEFINE_CONVERTIBLE_TYPE(const char*, ConstCharPtr,
+                               wxAnyConvertString, wxString)
+WX_ANY_DEFINE_CONVERTIBLE_TYPE(const wchar_t*, ConstWchar_tPtr,
+                               wxAnyConvertString, wxString)

 
 //
 // Bool value type
 
 //
 // Bool value type


@@ -479,6 +526,123 @@ WX_ANY_DEFINE_SUB_TYPE(float, Double)
 WX_ANY_DEFINE_SUB_TYPE(double, Double)
 
 
 WX_ANY_DEFINE_SUB_TYPE(double, Double)
 
 

+//
+// Defines a dummy wxAnyValueTypeImpl<> with given export
+// declaration. This is needed if a class is used with
+// wxAny in both user shared library and application.
+//
+#define wxDECLARE_ANY_TYPE(CLS, DECL) \
+template<> \
+class DECL wxAnyValueTypeImpl<CLS> : \
+    public wxAnyValueTypeImplBase<CLS> \
+{ \
+    WX_DECLARE_ANY_VALUE_TYPE(wxAnyValueTypeImpl<CLS>) \
+public: \
+    wxAnyValueTypeImpl() : \
+        wxAnyValueTypeImplBase<CLS>() { } \
+    virtual ~wxAnyValueTypeImpl() { } \
+ \
+    virtual bool ConvertValue(const wxAnyValueBuffer& src, \
+                              wxAnyValueType* dstType, \
+                              wxAnyValueBuffer& dst) const \
+    { \
+        wxUnusedVar(src); \
+        wxUnusedVar(dstType); \
+        wxUnusedVar(dst); \
+        return false; \
+    } \
+};
+
+
+// Make sure some of wx's own types get the right wxAnyValueType export
+// (this is needed only for types that are referred to from wxBase.
+// currently we may not use any of these types from there, but let's
+// use the macro on at least one to make sure it compiles since we can't
+// really test it properly in unittests since a separate DLL would
+// be needed).
+#if wxUSE_DATETIME
+    #include "wx/datetime.h"
+    wxDECLARE_ANY_TYPE(wxDateTime, WXDLLIMPEXP_BASE)
+#endif
+
+//#include "wx/object.h"
+//wxDECLARE_ANY_TYPE(wxObject*, WXDLLIMPEXP_BASE)
+
+//#include "wx/arrstr.h"
+//wxDECLARE_ANY_TYPE(wxArrayString, WXDLLIMPEXP_BASE)
+
+
+#if wxUSE_VARIANT
+
+class WXDLLIMPEXP_FWD_BASE wxAnyToVariantRegistration;
+
+// Because of header inter-dependencies, cannot include this earlier
+#include "wx/variant.h"
+
+//
+// wxVariantData* data type implementation. For cases when appropriate
+// wxAny<->wxVariant conversion code is missing.
+//
+
+class WXDLLIMPEXP_BASE wxAnyValueTypeImplVariantData :
+    public wxAnyValueTypeImplBase<wxVariantData*>
+{
+    WX_DECLARE_ANY_VALUE_TYPE(wxAnyValueTypeImplVariantData)
+public:
+    wxAnyValueTypeImplVariantData() :
+        wxAnyValueTypeImplBase<wxVariantData*>() { }
+    virtual ~wxAnyValueTypeImplVariantData() { }
+
+    virtual void DeleteValue(wxAnyValueBuffer& buf) const
+    {
+        wxVariantData* data = static_cast<wxVariantData*>(buf.m_ptr);
+        if ( data )
+            data->DecRef();
+    }
+
+    virtual void CopyBuffer(const wxAnyValueBuffer& src,
+                            wxAnyValueBuffer& dst) const
+    {
+        wxVariantData* data = static_cast<wxVariantData*>(src.m_ptr);
+        if ( data )
+            data->IncRef();
+        dst.m_ptr = data;
+    }
+
+    static void SetValue(wxVariantData* value,
+                         wxAnyValueBuffer& buf)
+    {
+        value->IncRef();
+        buf.m_ptr = value;
+    }
+
+    static wxVariantData* GetValue(const wxAnyValueBuffer& buf)
+    {
+        return static_cast<wxVariantData*>(buf.m_ptr);
+    }
+
+    virtual bool ConvertValue(const wxAnyValueBuffer& src,
+                              wxAnyValueType* dstType,
+                              wxAnyValueBuffer& dst) const
+    {
+        wxUnusedVar(src);
+        wxUnusedVar(dstType);
+        wxUnusedVar(dst);
+        return false;
+    }
+};
+
+template<>
+class wxAnyValueTypeImpl<wxVariantData*> :
+    public wxAnyValueTypeImplVariantData
+{
+public:
+    wxAnyValueTypeImpl() : wxAnyValueTypeImplVariantData() { }
+    virtual ~wxAnyValueTypeImpl() { }
+};
+
+#endif // wxUSE_VARIANT
+

 #ifdef __VISUALC6__
     // Re-enable useless VC6 warnings
     #pragma warning (pop)
 #ifdef __VISUALC6__
     // Re-enable useless VC6 warnings
     #pragma warning (pop)


@@ -520,6 +684,22 @@ bool operator==(TUS value) const \
 }
 
 
 }
 
 

+#if wxUSE_VARIANT
+
+// Note that the following functions are implemented outside wxAny class
+// so that it can reside entirely in header and lack the export declaration.
+
+// Helper function used to associate wxAnyValueType with a wxVariantData.
+extern WXDLLIMPEXP_BASE void
+wxPreRegisterAnyToVariant(wxAnyToVariantRegistration* reg);
+
+// This function performs main wxAny to wxVariant conversion duties.
+extern WXDLLIMPEXP_BASE bool
+wxConvertAnyToVariant(const wxAny& any, wxVariant* variant);
+
+#endif // wxUSE_VARIANT
+
+

 //
 // The wxAny class represents a container for any type. A variant's value
 // can be changed at run time, possibly to a different type of value.
 //
 // The wxAny class represents a container for any type. A variant's value
 // can be changed at run time, possibly to a different type of value.


@@ -550,15 +730,23 @@ public:
     /**
         Various constructors.
     */
     /**
         Various constructors.
     */

+    template<typename T>
+    wxAny(const T& value)
+    {
+        m_type = wxAnyValueTypeImpl<T>::sm_instance.get();
+        wxAnyValueTypeImpl<T>::SetValue(value, m_buffer);
+    }
+
+    // These two constructors are needed to deal with string literals

     wxAny(const char* value)
     {
     wxAny(const char* value)
     {

-        m_type = wxAnyNullValueType;
-        Assign(wxString(value));
+        m_type = wxAnyValueTypeImpl<const char*>::sm_instance.get();
+        wxAnyValueTypeImpl<const char*>::SetValue(value, m_buffer);

     }
     wxAny(const wchar_t* value)
     {
     }
     wxAny(const wchar_t* value)
     {

-        m_type = wxAnyNullValueType;
-        Assign(wxString(value));
+        m_type = wxAnyValueTypeImpl<const wchar_t*>::sm_instance.get();
+        wxAnyValueTypeImpl<const wchar_t*>::SetValue(value, m_buffer);

     }
 
     wxAny(const wxAny& any)
     }
 
     wxAny(const wxAny& any)


@@ -567,12 +755,14 @@ public:
         AssignAny(any);
     }
 
         AssignAny(any);
     }
 

-    template<typename T>
-    wxAny(const T& value)
+#if wxUSE_VARIANT
+    wxAny(const wxVariant& variant)

     {
     {

-        m_type = wxAnyValueTypeImpl<T>::sm_instance;
-        wxAnyValueTypeImpl<T>::SetValue(value, m_buffer);
+        m_type = wxAnyNullValueType;
+        AssignVariant(variant);

     }
     }

+#endif
+

     //@}
 
     /**
     //@}
 
     /**


@@ -587,7 +777,7 @@ public:
     */
     // FIXME-VC6: remove this hack when VC6 is no longer supported
     template <typename T>
     */
     // FIXME-VC6: remove this hack when VC6 is no longer supported
     template <typename T>

-    bool CheckType(T* = NULL)
+    bool CheckType(T* = NULL) const

     {
         return m_type->CheckType<T>();
     }
     {
         return m_type->CheckType<T>();
     }


@@ -597,8 +787,9 @@ public:
 
         @remarks You cannot reliably test whether two wxAnys are of
                  same value type by simply comparing return values
 
         @remarks You cannot reliably test whether two wxAnys are of
                  same value type by simply comparing return values

-                 of wxAny::GetType(). Instead use
-                 wxAnyValueType::CheckType<T>() template function.
+                 of wxAny::GetType(). Instead, use wxAny::HasSameType().
+
+        @see HasSameType()

     */
     const wxAnyValueType* GetType() const
     {
     */
     const wxAnyValueType* GetType() const
     {


@@ -606,7 +797,16 @@ public:
     }
 
     /**
     }
 
     /**

-        Tests if wxAny is null (that is, whether there is data).
+        Returns @true if this and another wxAny have the same
+        value type.
+    */
+    bool HasSameType(const wxAny& other) const
+    {
+        return GetType()->IsSameType(other.GetType());
+    }
+
+    /**
+        Tests if wxAny is null (that is, whether there is no data).

     */
     bool IsNull() const
     {
     */
     bool IsNull() const
     {


@@ -626,26 +826,41 @@ public:
     /**
         Assignment operators.
     */
     /**
         Assignment operators.
     */

+    template<typename T>
+    wxAny& operator=(const T &value)
+    {
+        m_type->DeleteValue(m_buffer);
+        m_type = wxAnyValueTypeImpl<T>::sm_instance.get();
+        wxAnyValueTypeImpl<T>::SetValue(value, m_buffer);
+        return *this;
+    }
+

     wxAny& operator=(const wxAny &any)
     {
     wxAny& operator=(const wxAny &any)
     {

-        AssignAny(any);
+        if (this != &any)
+            AssignAny(any);

         return *this;
     }
 
         return *this;
     }
 

-    template<typename T>
-    wxAny& operator=(const T &value)
+#if wxUSE_VARIANT
+    wxAny& operator=(const wxVariant &variant)

     {
     {

-        m_type->DeleteValue(m_buffer);
-        m_type = wxAnyValueTypeImpl<T>::sm_instance;
-        wxAnyValueTypeImpl<T>::SetValue(value, m_buffer);
+        AssignVariant(variant);

         return *this;
     }
         return *this;
     }

+#endif

 
 

+    // These two operators are needed to deal with string literals

     wxAny& operator=(const char* value)
     wxAny& operator=(const char* value)

-        { Assign(wxString(value)); return *this; }
+    {
+        Assign(value);
+        return *this;
+    }

     wxAny& operator=(const wchar_t* value)
     wxAny& operator=(const wchar_t* value)

-        { Assign(wxString(value)); return *this; }
-    //@}
+    {
+        Assign(value);
+        return *this;
+    }

 
     //@{
     /**
 
     //@{
     /**


@@ -653,12 +868,10 @@ public:
     */
     bool operator==(const wxString& value) const
     {
     */
     bool operator==(const wxString& value) const
     {

-        if ( !wxAnyValueTypeImpl<wxString>::IsSameClass(m_type) )
+        wxString value2;
+        if ( !GetAs(&value2) )

             return false;
             return false;

-
-        return value ==
-            static_cast<wxString>
-                (wxAnyValueTypeImpl<wxString>::GetValue(m_buffer));
+        return value == value2;

     }
 
     bool operator==(const char* value) const
     }
 
     bool operator==(const char* value) const


@@ -717,14 +930,17 @@ public:
     //@}
 
     /**
     //@}
 
     /**

-        This template function converts wxAny into given type. No dynamic
-        conversion is performed, so if the type is incorrect an assertion
-        failure will occur in debug builds, and a bogus value is returned
-        in release ones.
+        This template function converts wxAny into given type. In most cases
+        no type conversion is performed, so if the type is incorrect an
+        assertion failure will occur.

 
 

-        @remarks This template function does not work on some older compilers
-                (such as Visual C++ 6.0). For full compiler ccompatibility
-                please use wxANY_AS(any, T) macro instead.
+        @remarks For conveniency, conversion is done when T is wxString. This
+                 is useful when a string literal (which are treated as
+                 const char* and const wchar_t*) has been assigned to wxAny.
+
+                 This template function may not work properly with Visual C++
+                 6. For full compiler compatibility, please use
+                 wxANY_AS(any, T) macro instead.

     */
     // FIXME-VC6: remove this hack when VC6 is no longer supported
     template<typename T>
     */
     // FIXME-VC6: remove this hack when VC6 is no longer supported
     template<typename T>


@@ -738,6 +954,19 @@ public:
         return static_cast<T>(wxAnyValueTypeImpl<T>::GetValue(m_buffer));
     }
 
         return static_cast<T>(wxAnyValueTypeImpl<T>::GetValue(m_buffer));
     }
 

+    // Allow easy conversion from 'const char *' etc. to wxString
+    // FIXME-VC6: remove this hack when VC6 is no longer supported
+    //template<>
+    wxString As(wxString*) const
+    {
+        wxString value;
+        if ( !GetAs(&value) )
+        {
+            wxFAIL_MSG("Incorrect or non-convertible data type");
+        }
+        return value;
+    }
+

     /**
         Template function that etrieves and converts the value of this
         variant to the type that T* value is.
     /**
         Template function that etrieves and converts the value of this
         variant to the type that T* value is.


@@ -750,7 +979,7 @@ public:
         if ( !wxAnyValueTypeImpl<T>::IsSameClass(m_type) )
         {
             wxAnyValueType* otherType =
         if ( !wxAnyValueTypeImpl<T>::IsSameClass(m_type) )
         {
             wxAnyValueType* otherType =

-                wxAnyValueTypeImpl<T>::sm_instance;
+                wxAnyValueTypeImpl<T>::sm_instance.get();

             wxAnyValueBuffer temp_buf;
 
             if ( !m_type->ConvertValue(m_buffer, otherType, temp_buf) )
             wxAnyValueBuffer temp_buf;
 
             if ( !m_type->ConvertValue(m_buffer, otherType, temp_buf) )


@@ -766,6 +995,14 @@ public:
         return true;
     }
 
         return true;
     }
 

+#if wxUSE_VARIANT
+    // GetAs() wxVariant specialization
+    bool GetAs(wxVariant* value) const
+    {
+        return wxConvertAnyToVariant(*this, value);
+    }
+#endif
+

 private:
     // Assignment functions
     void AssignAny(const wxAny& any)
 private:
     // Assignment functions
     void AssignAny(const wxAny& any)


@@ -781,11 +1018,35 @@ private:
         newType->CopyBuffer(any.m_buffer, m_buffer);
     }
 
         newType->CopyBuffer(any.m_buffer, m_buffer);
     }
 

+#if wxUSE_VARIANT
+    void AssignVariant(const wxVariant& variant)
+    {
+        wxVariantData* data = variant.GetData();
+
+        if ( data && data->GetAsAny(this) )
+            return;
+
+        m_type->DeleteValue(m_buffer);
+
+        if ( variant.IsNull() )
+        {
+            // Init as Null
+            m_type = wxAnyNullValueType;
+        }
+        else
+        {
+            // If everything else fails, wrap the whole wxVariantData
+            m_type = wxAnyValueTypeImpl<wxVariantData*>::sm_instance.get();
+            wxAnyValueTypeImpl<wxVariantData*>::SetValue(data, m_buffer);
+        }
+    }
+#endif
+

     template<typename T>
     void Assign(const T &value)
     {
         m_type->DeleteValue(m_buffer);
     template<typename T>
     void Assign(const T &value)
     {
         m_type->DeleteValue(m_buffer);

-        m_type = wxAnyValueTypeImpl<T>::sm_instance;
+        m_type = wxAnyValueTypeImpl<T>::sm_instance.get();

         wxAnyValueTypeImpl<T>::SetValue(value, m_buffer);
     }
 
         wxAnyValueTypeImpl<T>::SetValue(value, m_buffer);
     }
 


@@ -798,17 +1059,17 @@ private:
 //
 // This method of checking the type is compatible with VC6
 #define wxANY_CHECK_TYPE(any, T) \
 //
 // This method of checking the type is compatible with VC6
 #define wxANY_CHECK_TYPE(any, T) \

-    wxANY_VALUE_TYPE_CHECK_TYPE(any.GetType(), T)
+    wxANY_VALUE_TYPE_CHECK_TYPE((any).GetType(), T)

 
 
 //
 // This method of getting the value is compatible with VC6
 #define wxANY_AS(any, T) \
 
 
 //
 // This method of getting the value is compatible with VC6
 #define wxANY_AS(any, T) \

-    any.As(static_cast<T*>(NULL))
+    (any).As(static_cast<T*>(NULL))

 
 
 template<typename T>
 
 
 template<typename T>

-inline bool wxAnyValueType::CheckType(T* reserved)
+inline bool wxAnyValueType::CheckType(T* reserved) const

 {
     wxUnusedVar(reserved);
     return wxAnyValueTypeImpl<T>::IsSameClass(this);
 {
     wxUnusedVar(reserved);
     return wxAnyValueTypeImpl<T>::IsSameClass(this);