diff options
Diffstat (limited to 'src/corelib/global')
| -rw-r--r-- | src/corelib/global/qglobal.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h index f56629faa1..8680742c94 100644 --- a/src/corelib/global/qglobal.h +++ b/src/corelib/global/qglobal.h @@ -1005,6 +1005,15 @@ QForeachContainer<typename std::decay<T>::type> qMakeForeachContainer(T &&t) } } + +#if __cplusplus >= 201703L +// Use C++17 if statement with initializer. User's code ends up in a else so +// scoping of different ifs is not broken +#define Q_FOREACH(variable, container) \ +for (auto _container_ = QtPrivate::qMakeForeachContainer(container); \ + _container_.i != _container_.e; ++_container_.i) \ + if (variable = *_container_.i; false) {} else +#else // Explanation of the control word: // - it's initialized to 1 // - that means both the inner and outer loops start @@ -1019,7 +1028,7 @@ for (auto _container_ = QtPrivate::qMakeForeachContainer(container); \ _container_.control && _container_.i != _container_.e; \ ++_container_.i, _container_.control ^= 1) \ for (variable = *_container_.i; _container_.control; _container_.control = 0) - +#endif #endif // QT_NO_FOREACH #define Q_FOREVER for(;;) |