diff options
| -rw-r--r-- | src/corelib/tools/qset.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/src/corelib/tools/qset.h b/src/corelib/tools/qset.h index 08b38a08c2..7ded120ab7 100644 --- a/src/corelib/tools/qset.h +++ b/src/corelib/tools/qset.h @@ -340,13 +340,14 @@ Q_INLINE_TEMPLATE bool QSet<T>::intersects(const QSet<T> &other) const template <class T> Q_INLINE_TEMPLATE QSet<T> &QSet<T>::subtract(const QSet<T> &other) { - QSet<T> copy1(*this); - QSet<T> copy2(other); - typename QSet<T>::const_iterator i = copy1.constEnd(); - while (i != copy1.constBegin()) { - --i; - if (copy2.contains(*i)) + if (&other == this) { + clear(); + } else { + auto i = other.constEnd(); + while (i != other.constBegin()) { + --i; remove(*i); + } } return *this; } |