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;
}
};
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) \
{ \
- 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); \
} \
};
//
-// 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
//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
}
+#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.
/**
Various constructors.
*/
+ template<typename T>
+ wxAny(const T& value)
+ {
+ m_type = wxAnyValueTypeImpl<T>::sm_instance;
+ wxAnyValueTypeImpl<T>::SetValue(value, m_buffer);
+ }
+
+ // These two constructors are needed to deal with string literals
wxAny(const char* value)
{
- m_type = wxAnyNullValueType;
- Assign(wxString(value));
+ m_type = wxAnyValueTypeImpl<const char*>::sm_instance;
+ wxAnyValueTypeImpl<const char*>::SetValue(value, m_buffer);
}
wxAny(const wchar_t* value)
{
- m_type = wxAnyNullValueType;
- Assign(wxString(value));
+ m_type = wxAnyValueTypeImpl<const wchar_t*>::sm_instance;
+ wxAnyValueTypeImpl<const wchar_t*>::SetValue(value, m_buffer);
}
wxAny(const wxAny& 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
+
//@}
/**
/**
Assignment operators.
*/
+ template<typename T>
+ wxAny& operator=(const T &value)
+ {
+ m_type->DeleteValue(m_buffer);
+ m_type = wxAnyValueTypeImpl<T>::sm_instance;
+ wxAnyValueTypeImpl<T>::SetValue(value, m_buffer);
+ return *this;
+ }
+
wxAny& operator=(const wxAny &any)
{
if (this != &any)
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;
}
+#endif
+ // These two operators are needed to deal with string literals
wxAny& operator=(const char* value)
- { Assign(wxString(value)); return *this; }
+ {
+ Assign(value);
+ return *this;
+ }
wxAny& operator=(const wchar_t* value)
- { Assign(wxString(value)); return *this; }
- //@}
+ {
+ Assign(value);
+ return *this;
+ }
//@{
/**
*/
bool operator==(const wxString& value) const
{
- if ( !wxAnyValueTypeImpl<wxString>::IsSameClass(m_type) )
+ wxString value2;
+ if ( !GetAs(&value2) )
return false;
-
- return value ==
- static_cast<wxString>
- (wxAnyValueTypeImpl<wxString>::GetValue(m_buffer));
+ return value == value2;
}
bool operator==(const char* value) const
//@}
/**
- 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>
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.
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)
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;
+ wxAnyValueTypeImpl<wxVariantData*>::SetValue(data, m_buffer);
+ }
+ }
+#endif
+
template<typename T>
void Assign(const T &value)
{
//
// 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) \
- any.As(static_cast<T*>(NULL))
+ (any).As(static_cast<T*>(NULL))
template<typename T>
projects / wxWidgets.git / blobdiff