diff options
author | Mikhail Svetkin <mikhail.svetkin@qt.io> | 2019-03-08 15:38:33 +0100 |
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committer | Mikhail Svetkin <mikhail.svetkin@qt.io> | 2019-03-25 19:48:29 +0000 |
commit | 4054759aecd06313a775c8c71748ec52ca7dc27d (patch) | |
tree | 964544ea633a1c854c10a16ea7f927087485784d /tests/auto/corelib/tools/qpair/tst_qpair.cpp | |
parent | 461e89ee1a53f7669e0215f9015380c4a9d62371 (diff) |
core: Add deduction guides for QPair
[ChangeLog][QtCore] Added support of deduction guides for QPair
Change-Id: I41a798390dc2c925b0f8432ba12aa345724de2d7
Reviewed-by: Martin Smith <martin.smith@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>
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" |