diff options
Diffstat (limited to 'src/corelib/kernel/qmetatype.cpp')
| -rw-r--r-- | src/corelib/kernel/qmetatype.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/corelib/kernel/qmetatype.cpp b/src/corelib/kernel/qmetatype.cpp index 6a7c5c2a34..d965c48255 100644 --- a/src/corelib/kernel/qmetatype.cpp +++ b/src/corelib/kernel/qmetatype.cpp @@ -116,6 +116,16 @@ template<> struct TypeDefinition<QRegExp> { static const bool IsAvailable = fals #endif } // namespace +/*! + \macro Q_DECLARE_OPAQUE_POINTER(Pointer) + \relates QMetaType + + This macro enables pointers to forward-declared types to be registered with + QMetaType using either Q_DECLARE_METATYPE() or qRegisterMetaType(). + + \sa Q_DECLARE_METATYPE(), qRegisterMetaType() + +*/ /*! \macro Q_DECLARE_METATYPE(Type) @@ -126,6 +136,11 @@ template<> struct TypeDefinition<QRegExp> { static const bool IsAvailable = fals a public destructor. It is needed to use the type \a Type as a custom type in QVariant. + This macro requires that \a Type is a fully defined type at the point where + it is used. For pointer types, it also requires that the pointed to type is + fully defined. Use in conjunction with Q_DECLARE_OPAQUE_POINTER() to + register pointers to forward declared types. + Ideally, this macro should be placed below the declaration of the class or struct. If that is not possible, it can be put in a private header file which has to be included every time that @@ -1630,6 +1645,11 @@ QMetaType::TypeFlags QMetaType::typeFlags(int type) public default constructor, a public copy constructor and a public destructor can be registered. + This function requires that \c{T} is a fully defined type at the point + where the function is called. For pointer types, it also requires that the + pointed to type is fully defined. Use Q_DECLARE_OPAQUE_POINTER() to be able + to register pointers to forward declared types. + After a type has been registered, you can create and destroy objects of that type dynamically at run-time. |