diff options
| author | Sérgio Martins <sergio.martins@kdab.com> | 2015-05-25 18:32:35 +0100 |
|---|---|---|
| committer | Marc Mutz <marc.mutz@kdab.com> | 2015-05-30 07:15:24 +0000 |
| commit | 9eff0dd19d6507ec400f036dd27efe960e4e5f78 (patch) | |
| tree | ed9cd2e3bffc0df9e6fcbb1daa4b52210aec347b /tests | |
| parent | fda08f3971e854ad1623fb99212746143c27e412 (diff) | |
QSet: Introduce intersects().
The pattern "mySet.intersect(other).isEmpty()" has been spotted in
the wild and in Qt codebase. intersects() is much cheaper because it
bails out as soon as we find one common item and doesn't do any
allocations.
[ChangeLog][QtCore][QSet] Added intersects().
Change-Id: I44a350dc4cdb9deb835a23eee99fc99d6ca24c82
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/auto/corelib/tools/qset/tst_qset.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tests/auto/corelib/tools/qset/tst_qset.cpp b/tests/auto/corelib/tools/qset/tst_qset.cpp index f13d69514a..ef0ebabd66 100644 --- a/tests/auto/corelib/tools/qset/tst_qset.cpp +++ b/tests/auto/corelib/tools/qset/tst_qset.cpp @@ -73,6 +73,7 @@ private slots: void makeSureTheComfortFunctionsCompile(); void initializerList(); void qhash(); + void intersects(); }; struct IdentityTracker { @@ -1030,6 +1031,32 @@ void tst_QSet::qhash() } } +void tst_QSet::intersects() +{ + QSet<int> s1; + QSet<int> s2; + + QVERIFY(!s1.intersects(s1)); + QVERIFY(!s1.intersects(s2)); + + s1 << 100; + QVERIFY(s1.intersects(s1)); + QVERIFY(!s1.intersects(s2)); + + s2 << 200; + QVERIFY(!s1.intersects(s2)); + + s1 << 200; + QVERIFY(s1.intersects(s2)); + + const QtQHashSeedSaver seedSaver(0x10101010); + QSet<int> s3; + s3 << 500; + QVERIFY(!s1.intersects(s3)); + s3 << 200; + QVERIFY(s1.intersects(s3)); +} + QTEST_APPLESS_MAIN(tst_QSet) #include "tst_qset.moc" |