diff options
Diffstat (limited to 'src/corelib/tools')
| -rw-r--r-- | src/corelib/tools/qarraydataops.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/corelib/tools/qarraydataops.h b/src/corelib/tools/qarraydataops.h index 1d7e307192..b0834ad762 100644 --- a/src/corelib/tools/qarraydataops.h +++ b/src/corelib/tools/qarraydataops.h @@ -1367,6 +1367,8 @@ public: Q_ASSERT(!this->isShared() || b == e); Q_ASSERT(b <= e); Q_ASSERT(size_t(e - b) <= this->allocatedCapacity() - this->size); + if (b == e) // short-cut and handling the case b and e == nullptr + return; prepareSpaceForAppend(b, e, e - b); // ### perf. loss Base::insert(GrowsForwardTag{}, this->end(), b, e); @@ -1397,6 +1399,8 @@ public: Q_ASSERT(!this->isShared() || b == e); Q_ASSERT(b <= e); Q_ASSERT(size_t(e - b) <= this->allocatedCapacity() - this->size); + if (b == e) // short-cut and handling the case b and e == nullptr + return; prepareSpaceForAppend(b, e, e - b); // ### perf. loss Base::moveAppend(b, e); @@ -1421,6 +1425,8 @@ public: Q_ASSERT(b <= e); Q_ASSERT(e <= where || b > this->end() || where == this->end()); // No overlap or append Q_ASSERT(size_t(e - b) <= this->allocatedCapacity() - this->size); + if (b == e) // short-cut and handling the case b and e == nullptr + return; if (this->size > 0 && where == this->begin()) { // prepend case - special space arrangement prepareSpaceForPrepend(b, e, e - b); // ### perf. loss |