#if wxUSE_ANY
+#include <new> // for placement new
#include "wx/string.h"
-#include "wx/meta/movable.h"
#include "wx/meta/if.h"
#include "wx/typeinfo.h"
-
+#include "wx/list.h"
// Size of the wxAny value buffer.
enum
/**
Default constructor.
*/
- wxAnyValueType();
+ wxAnyValueType()
+ {
+ }
/**
Destructor.
a specific C++ data type.
@remarks This template function does not work on some older compilers
- (such as Visual C++ 6.0). For full compiler ccompatibility
+ (such as Visual C++ 6.0). For full compiler compatibility
please use wxANY_VALUE_TYPE_CHECK_TYPE(valueTypePtr, T) macro
instead.
*/
// 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;
+
+#if wxUSE_EXTENDED_RTTI
+ virtual const wxTypeInfo* GetTypeInfo() const = 0;
+#endif
+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:
+ wxAnyValueType* m_ptr;
};
+
//
// This method of checking the type is compatible with VC6
#define wxANY_VALUE_TYPE_CHECK_TYPE(valueTypePtr, T) \
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; \
public: \
static bool IsSameClass(const wxAnyValueType* otherType) \
{ \
- return wxTypeId(*sm_instance) == wxTypeId(*otherType); \
+ return wxTypeId(*sm_instance.get()) == wxTypeId(*otherType); \
} \
virtual bool IsSameType(const wxAnyValueType* otherType) const \
{ \
return IsSameClass(otherType); \
} \
private: \
- static CLS* sm_instance; \
+ static wxAnyValueTypeScopedPtr sm_instance; \
public: \
static wxAnyValueType* GetInstance() \
{ \
- return sm_instance; \
+ return sm_instance.get(); \
}
#define WX_IMPLEMENT_ANY_VALUE_TYPE(CLS) \
- CLS* CLS::sm_instance = new CLS();
+wxAnyValueTypeScopedPtr CLS::sm_instance(new CLS());
#ifdef __VISUALC6__
{
template<typename T>
-class wxAnyValueTypeOpsMovable
+class wxAnyValueTypeOpsInplace
{
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)
{
- 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)
{
- // Breaking this code into two lines should supress
+ // Breaking this code into two lines should suppress
// GCC's 'type-punned pointer will break strict-aliasing rules'
// warning.
const T* value = reinterpret_cast<const T*>(&buf.m_buffer[0]);
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;
{
return Ops::GetValue(buf);
}
+#if wxUSE_EXTENDED_RTTI
+ virtual const wxTypeInfo* GetTypeInfo() const
+ {
+ return wxGetTypeInfo((T*)NULL);
+ }
+#endif
};
};
template<typename T>
-wxAnyValueTypeImpl<T>* wxAnyValueTypeImpl<T>::sm_instance =
- new wxAnyValueTypeImpl<T>();
+wxAnyValueTypeScopedPtr wxAnyValueTypeImpl<T>::sm_instance = new wxAnyValueTypeImpl<T>();
//
// Helper macro for using same base value type implementation for multiple
// actual C++ data types.
//
-#define WX_ANY_DEFINE_SUB_TYPE(T, CLSTYPE) \
+#define _WX_ANY_DEFINE_SUB_TYPE(T, CLSTYPE) \
template<> \
class wxAnyValueTypeImpl<T> : public wxAnyValueTypeImpl##CLSTYPE \
{ \
const UseDataType* sptr = \
reinterpret_cast<const UseDataType*>(voidPtr); \
return static_cast<T>(*sptr); \
+ }
+
+#if wxUSE_EXTENDED_RTTI
+#define WX_ANY_DEFINE_SUB_TYPE(T, CLSTYPE) \
+_WX_ANY_DEFINE_SUB_TYPE(T, CLSTYPE)\
+ virtual const wxTypeInfo* GetTypeInfo() const \
+ { \
+ return wxGetTypeInfo((T*)NULL); \
} \
};
-
+#else
+#define WX_ANY_DEFINE_SUB_TYPE(T, CLSTYPE) \
+_WX_ANY_DEFINE_SUB_TYPE(T, CLSTYPE)\
+};
+#endif
//
// Integer value types
// (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
+// really test it properly in unit tests since a separate DLL would
// be needed).
#if wxUSE_DATETIME
#include "wx/datetime.h"
template<typename T>
wxAny(const T& value)
{
- m_type = wxAnyValueTypeImpl<T>::sm_instance;
+ 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)
{
- m_type = wxAnyValueTypeImpl<const char*>::sm_instance;
+ m_type = wxAnyValueTypeImpl<const char*>::sm_instance.get();
wxAnyValueTypeImpl<const char*>::SetValue(value, m_buffer);
}
wxAny(const wchar_t* value)
{
- m_type = wxAnyValueTypeImpl<const wchar_t*>::sm_instance;
+ m_type = wxAnyValueTypeImpl<const wchar_t*>::sm_instance.get();
wxAnyValueTypeImpl<const wchar_t*>::SetValue(value, m_buffer);
}
*/
// 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>();
}
@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
{
}
/**
- 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
{
wxAny& operator=(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);
return *this;
}
no type conversion is performed, so if the type is incorrect an
assertion failure will occur.
- @remarks For conveniency, conversion is done when T is wxString. This
+ @remarks For convenience, 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.
return value;
}
+#if wxUSE_EXTENDED_RTTI
+ const wxTypeInfo* GetTypeInfo() const
+ {
+ return m_type->GetTypeInfo();
+ }
+#endif
/**
- Template function that etrieves and converts the value of this
+ Template function that retrieves and converts the value of this
variant to the type that T* value is.
- @return Returns @true if conversion was succesfull.
+ @return Returns @true if conversion was successful.
*/
template<typename T>
bool GetAs(T* value) const
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) )
else
{
// If everything else fails, wrap the whole wxVariantData
- m_type = wxAnyValueTypeImpl<wxVariantData*>::sm_instance;
+ m_type = wxAnyValueTypeImpl<wxVariantData*>::sm_instance.get();
wxAnyValueTypeImpl<wxVariantData*>::SetValue(data, m_buffer);
}
}
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);
}
template<typename T>
-inline bool wxAnyValueType::CheckType(T* reserved)
+inline bool wxAnyValueType::CheckType(T* reserved) const
{
wxUnusedVar(reserved);
return wxAnyValueTypeImpl<T>::IsSameClass(this);
}
-
+WX_DECLARE_LIST_WITH_DECL(wxAny, wxAnyList, class WXDLLIMPEXP_BASE);
#endif // wxUSE_ANY
projects / wxWidgets.git / blobdiff