qt 6.5.1 original

tests/auto/corelib/tools/qpair/CMakeLists.txt

@@ -0,0 +1,14 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_qpair Test:
+#####################################################################
+
+qt_internal_add_test(tst_qpair
+    SOURCES
+        tst_qpair.cpp
+)
+
+## Scopes:
+#####################################################################

tests/auto/corelib/tools/qpair/tst_qpair.cpp

@@ -0,0 +1,257 @@
+// Copyright (C) 2012 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com>
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QTest>
+
+#include <QPair>
+#include <QSize>
+
+class tst_QPair : public QObject
+{
+    Q_OBJECT
+private Q_SLOTS:
+    void pairOfReferences();
+    void structuredBindings();
+    void testConstexpr();
+    void testConversions();
+    void taskQTBUG_48780_pairContainingCArray();
+    void testDeductionRules();
+};
+
+class C { C() {} ~C() {} Q_DECL_UNUSED_MEMBER char _[4]; };
+class M { M() {} Q_DECL_UNUSED_MEMBER char _[4]; };
+class P { Q_DECL_UNUSED_MEMBER char _[4]; };
+
+QT_BEGIN_NAMESPACE
+Q_DECLARE_TYPEINFO(M, Q_RELOCATABLE_TYPE);
+Q_DECLARE_TYPEINFO(P, Q_PRIMITIVE_TYPE);
+QT_END_NAMESPACE
+
+// avoid the comma:
+typedef QPair<C,C> QPairCC;
+typedef QPair<C,M> QPairCM;
+typedef QPair<C,P> QPairCP;
+typedef QPair<M,C> QPairMC;
+typedef QPair<M,M> QPairMM;
+typedef QPair<M,P> QPairMP;
+typedef QPair<P,C> QPairPC;
+typedef QPair<P,M> QPairPM;
+typedef QPair<P,P> QPairPP;
+
+static_assert( QTypeInfo<QPairCC>::isComplex);
+static_assert( !QTypeInfo<QPairCC>::isRelocatable );
+
+static_assert( QTypeInfo<QPairCM>::isComplex);
+static_assert( !QTypeInfo<QPairCM>::isRelocatable );
+
+static_assert( QTypeInfo<QPairCP>::isComplex);
+static_assert( !QTypeInfo<QPairCP>::isRelocatable );
+
+static_assert( QTypeInfo<QPairMC>::isComplex);
+static_assert( !QTypeInfo<QPairMC>::isRelocatable );
+
+static_assert( QTypeInfo<QPairMM>::isComplex);
+static_assert( QTypeInfo<QPairMM>::isRelocatable );
+
+static_assert( QTypeInfo<QPairMP>::isComplex);
+static_assert( QTypeInfo<QPairMP>::isRelocatable );
+
+static_assert( QTypeInfo<QPairPC>::isComplex);
+static_assert( !QTypeInfo<QPairPC>::isRelocatable );
+
+static_assert( QTypeInfo<QPairPM>::isComplex);
+static_assert( QTypeInfo<QPairPM>::isRelocatable );
+
+static_assert(!QTypeInfo<QPairPP>::isComplex);
+static_assert( QTypeInfo<QPairPP>::isRelocatable );
+
+static_assert(!QTypeInfo<QPairPP>::isPointer);
+
+
+void tst_QPair::pairOfReferences()
+{
+    int i = 0;
+    QString s;
+
+    QPair<int&, QString&> p(i, s);
+
+    p.first = 1;
+    QCOMPARE(i, 1);
+
+    i = 2;
+    QCOMPARE(p.first, 2);
+
+    p.second = QLatin1String("Hello");
+    QCOMPARE(s, QLatin1String("Hello"));
+
+    s = QLatin1String("olleH");
+    QCOMPARE(p.second, QLatin1String("olleH"));
+
+    QPair<int&, QString&> q = p;
+    q.first = 3;
+    QCOMPARE(i, 3);
+    QCOMPARE(p.first, 3);
+
+    q.second = QLatin1String("World");
+    QCOMPARE(s, QLatin1String("World"));
+    QCOMPARE(p.second, QLatin1String("World"));
+}
+
+void tst_QPair::structuredBindings()
+{
+    using PV = QPair<int, QString>;
+    using PR = QPair<int&, const QString&>;
+
+    {
+        PV pv = {42, "Hello"};
+        PR pr = {pv.first, pv.second};
+
+        auto [fv, sv] = pv;
+
+        fv = 24;
+        sv = "World";
+        QCOMPARE(fv, 24);
+        QCOMPARE(sv, "World");
+        QCOMPARE(pv.first, 42);
+        QCOMPARE(pv.second, "Hello");
+
+        auto [fr, sr] = pr;
+
+        fr = 2424;
+        // sr = "World"; // const
+        QCOMPARE(fr, 2424);
+        QCOMPARE(pv.first, 2424);
+    }
+
+    {
+        PV pv = {42, "Hello"};
+        PR pr = {pv.first, pv.second};
+
+        auto& [fv, sv] = pv;
+
+        fv = 24;
+        sv = "World";
+        QCOMPARE(fv, 24);
+        QCOMPARE(sv, "World");
+        QCOMPARE(pv.first, 24);
+        QCOMPARE(pv.second, "World");
+
+        auto& [fr, sr] = pr;
+
+        fr = 4242;
+        //sr = "2World"; // const
+
+        QCOMPARE(fr, 4242);
+        QCOMPARE(pr.first, 4242);
+        QCOMPARE(pv.first, 4242);
+    }
+}
+
+void tst_QPair::testConstexpr()
+{
+    constexpr QPair<int, double> pID = qMakePair(0, 0.0);
+    Q_UNUSED(pID);
+
+    constexpr QPair<double, double> pDD  = qMakePair(0.0, 0.0);
+    constexpr QPair<double, double> pDD2 = qMakePair(0, 0.0);   // involes (rvalue) conversion ctor
+    constexpr bool equal = pDD2 == pDD;
+    QVERIFY(equal);
+
+    constexpr QPair<QSize, int> pSI = qMakePair(QSize(4, 5), 6);
+    Q_UNUSED(pSI);
+}
+
+void tst_QPair::testConversions()
+{
+    // construction from lvalue:
+    {
+        const QPair<int, double> rhs(42, 4.5);
+        const QPair<int, int> pii = rhs;
+        QCOMPARE(pii.first, 42);
+        QCOMPARE(pii.second, 4);
+
+        const QPair<int, float> pif = rhs;
+        QCOMPARE(pif.first, 42);
+        QCOMPARE(pif.second, 4.5f);
+    }
+
+    // assignment from lvalue:
+    {
+        const QPair<int, double> rhs(42, 4.5);
+        QPair<int, int> pii;
+        pii = rhs;
+        QCOMPARE(pii.first, 42);
+        QCOMPARE(pii.second, 4);
+
+        QPair<int, float> pif;
+        pif = rhs;
+        QCOMPARE(pif.first, 42);
+        QCOMPARE(pif.second, 4.5f);
+    }
+
+    // construction from rvalue:
+    {
+#define rhs qMakePair(42, 4.5)
+        const QPair<int, int> pii = rhs;
+        QCOMPARE(pii.first, 42);
+        QCOMPARE(pii.second, 4);
+
+        const QPair<int, float> pif = rhs;
+        QCOMPARE(pif.first, 42);
+        QCOMPARE(pif.second, 4.5f);
+#undef rhs
+    }
+
+    // assignment from rvalue:
+    {
+#define rhs qMakePair(42, 4.5)
+        QPair<int, int> pii;
+        pii = rhs;
+        QCOMPARE(pii.first, 42);
+        QCOMPARE(pii.second, 4);
+
+        QPair<int, float> pif;
+        pif = rhs;
+        QCOMPARE(pif.first, 42);
+        QCOMPARE(pif.second, 4.5f);
+#undef rhs
+    }
+}
+
+void tst_QPair::taskQTBUG_48780_pairContainingCArray()
+{
+    // compile-only:
+    QPair<int[2], int> pair;
+    pair.first[0] = 0;
+    pair.first[1] = 1;
+    pair.second = 2;
+    Q_UNUSED(pair);
+}
+
+void tst_QPair::testDeductionRules()
+{
+#if defined(__cpp_deduction_guides) && __cpp_deduction_guides >= 201907L
+    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 (requires C++20's CTAD for aliases)");
+#endif
+}
+
+QTEST_APPLESS_MAIN(tst_QPair)
+#include "tst_qpair.moc"