diff options
Diffstat (limited to 'src/corelib/global/qglobal.h')
| -rw-r--r-- | src/corelib/global/qglobal.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h index 539e3e7cda..94de9fd79e 100644 --- a/src/corelib/global/qglobal.h +++ b/src/corelib/global/qglobal.h @@ -1316,6 +1316,17 @@ template <typename T> struct QEnableIf<true, T> { typedef T Type; }; #define QT_DEFINE_PLATFORM_INTERFACE(...) QT_OVERLOADED_MACRO(QT_DEFINE_PLATFORM_INTERFACE, QPlatformInterface, __VA_ARGS__) #define QT_DEFINE_PRIVATE_PLATFORM_INTERFACE(...) QT_OVERLOADED_MACRO(QT_DEFINE_PLATFORM_INTERFACE, QPlatformInterface::Private, __VA_ARGS__) +// This macro can be used to calculate member offsets for types with a non standard layout. +// It uses the fact that offsetof() is allowed to support those types since C++17 as an optional +// feature. All our compilers do support this, but some issue a warning, so we wrap the offsetof() +// call in a macro that disables the compiler warning. +#define Q_OFFSETOF(Class, member) \ + []() -> size_t { \ + QT_WARNING_PUSH QT_WARNING_DISABLE_INVALID_OFFSETOF \ + return offsetof(Class, member); \ + QT_WARNING_POP \ + }() + QT_END_NAMESPACE // We need to keep QTypeInfo, QSysInfo, QFlags, qDebug & family in qglobal.h for compatibility with Qt 4. |