diff options
| author | Marc Mutz <marc.mutz@kdab.com> | 2012-07-20 15:46:40 +0200 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-07-26 15:01:04 +0200 |
| commit | e083d253950d3e7ce1e6363cd29fba416e69e371 (patch) | |
| tree | 7990f2da2be356bb4d6dd30190d3646524d816db /src/corelib/kernel/qmetatype.h | |
| parent | f694b9c83fc4512228d5c9b3384bf7f2e03bb5d5 (diff) | |
QMetaTypeId2::IsBuiltIn: (new) template meta-function to check for built-in types
This allows to check whether QMetaTypeId2::MetaType exists, and can help
turn run-time into compile-time expressions, even without constexpr support,
or in situations where constexpr can't be used (because you can't overload
on it). This was designed for the QMetaType::registerConversion feature,
but it's much more widely applicable.
Change-Id: Iafa04add04bcb531b3f7fe3e751c7e91ee6a3bc0
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@nokia.com>
Diffstat (limited to 'src/corelib/kernel/qmetatype.h')
| -rw-r--r-- | src/corelib/kernel/qmetatype.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/corelib/kernel/qmetatype.h b/src/corelib/kernel/qmetatype.h index 6fc8333a80..7c3cae6f83 100644 --- a/src/corelib/kernel/qmetatype.h +++ b/src/corelib/kernel/qmetatype.h @@ -539,7 +539,7 @@ struct QMetaTypeId : public QMetaTypeIdQObject<T> template <typename T> struct QMetaTypeId2 { - enum { Defined = QMetaTypeId<T>::Defined }; + enum { Defined = QMetaTypeId<T>::Defined, IsBuiltIn=false }; static inline Q_DECL_CONSTEXPR int qt_metatype_id() { return QMetaTypeId<T>::qt_metatype_id(); } }; @@ -717,7 +717,7 @@ inline int qRegisterMetaTypeStreamOperators() QT_BEGIN_NAMESPACE \ template<> struct QMetaTypeId2<NAME> \ { \ - enum { Defined = 1, MetaType = METATYPEID }; \ + enum { Defined = 1, IsBuiltIn = true, MetaType = METATYPEID }; \ static inline Q_DECL_CONSTEXPR int qt_metatype_id() { return METATYPEID; } \ }; \ QT_END_NAMESPACE |