diff options
Diffstat (limited to 'tests/auto/corelib/tools/qpair/tst_qpair.cpp')
| -rw-r--r-- | tests/auto/corelib/tools/qpair/tst_qpair.cpp | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tests/auto/corelib/tools/qpair/tst_qpair.cpp b/tests/auto/corelib/tools/qpair/tst_qpair.cpp index dedc353e67..3c972329bc 100644 --- a/tests/auto/corelib/tools/qpair/tst_qpair.cpp +++ b/tests/auto/corelib/tools/qpair/tst_qpair.cpp @@ -39,6 +39,7 @@ private Q_SLOTS: void testConstexpr(); void testConversions(); void taskQTBUG_48780_pairContainingCArray(); + void testDeducationRules(); }; class C { C() {} char _[4]; }; @@ -202,5 +203,30 @@ void tst_QPair::taskQTBUG_48780_pairContainingCArray() Q_UNUSED(pair); } +void tst_QPair::testDeducationRules() +{ +#if defined(__cpp_deduction_guides) && __cpp_deduction_guides >= 201606 + QPair p1{1, 2}; + static_assert(std::is_same<decltype(p1)::first_type, decltype(1)>::value); + static_assert(std::is_same<decltype(p1)::second_type, decltype(2)>::value); + QCOMPARE(p1.first, 1); + QCOMPARE(p1.second, 2); + + QPair p2{QString("string"), 2}; + static_assert(std::is_same<decltype(p2)::first_type, QString>::value); + static_assert(std::is_same<decltype(p2)::second_type, decltype(2)>::value); + QCOMPARE(p2.first, "string"); + QCOMPARE(p2.second, 2); + + QPair p3(p2); + static_assert(std::is_same<decltype(p3)::first_type, decltype(p2)::first_type>::value); + static_assert(std::is_same<decltype(p3)::second_type, decltype(p2)::second_type>::value); + QCOMPARE(p3.first, "string"); + QCOMPARE(p3.second, 2); +#else + QSKIP("Unsupported"); +#endif +} + QTEST_APPLESS_MAIN(tst_QPair) #include "tst_qpair.moc" |