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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/QtTest>
class tst_QFlags: public QObject
{
Q_OBJECT
private slots:
void testFlag() const;
void testFlagZeroFlag() const;
void testFlagMultiBits() const;
void constExpr();
void signedness();
void classEnum();
void initializerLists();
void testSetFlags();
void adl();
};
void tst_QFlags::testFlag() const
{
Qt::MouseButtons btn = Qt::LeftButton | Qt::RightButton;
QVERIFY(btn.testFlag(Qt::LeftButton));
QVERIFY(!btn.testFlag(Qt::MiddleButton));
btn = { };
QVERIFY(!btn.testFlag(Qt::LeftButton));
}
void tst_QFlags::testFlagZeroFlag() const
{
{
Qt::MouseButtons btn = Qt::LeftButton | Qt::RightButton;
/* Qt::NoButton has the value 0. */
QVERIFY(!btn.testFlag(Qt::NoButton));
}
{
/* A zero enum set should test true with zero. */
QVERIFY(Qt::MouseButtons().testFlag(Qt::NoButton));
}
{
Qt::MouseButtons btn = Qt::NoButton;
QVERIFY(btn.testFlag(Qt::NoButton));
}
}
void tst_QFlags::testFlagMultiBits() const
{
/* Qt::Window is 0x00000001
* Qt::Dialog is 0x00000002 | Window
*/
{
const Qt::WindowFlags onlyWindow(Qt::Window);
QVERIFY(!onlyWindow.testFlag(Qt::Dialog));
}
{
const Qt::WindowFlags hasDialog(Qt::Dialog);
QVERIFY(hasDialog.testFlag(Qt::Dialog));
}
}
template <unsigned int N, typename T> bool verifyConstExpr(T n) { return n == N; }
Q_DECL_RELAXED_CONSTEXPR Qt::MouseButtons testRelaxedConstExpr()
{
Qt::MouseButtons value;
value = Qt::LeftButton | Qt::RightButton;
value |= Qt::MiddleButton;
value &= ~Qt::LeftButton;
value ^= Qt::RightButton;
return value;
}
void tst_QFlags::constExpr()
{
#ifdef Q_COMPILER_CONSTEXPR
Qt::MouseButtons btn = Qt::LeftButton | Qt::RightButton;
switch (btn) {
case Qt::LeftButton: QVERIFY(false); break;
case Qt::RightButton: QVERIFY(false); break;
case int(Qt::LeftButton | Qt::RightButton): QVERIFY(true); break;
default: QVERIFY(false);
}
QVERIFY(verifyConstExpr<uint((Qt::LeftButton | Qt::RightButton) & Qt::LeftButton)>(Qt::LeftButton));
QVERIFY(verifyConstExpr<uint((Qt::LeftButton | Qt::RightButton) & Qt::MiddleButton)>(0));
QVERIFY(verifyConstExpr<uint((Qt::LeftButton | Qt::RightButton) | Qt::MiddleButton)>(Qt::LeftButton | Qt::RightButton | Qt::MiddleButton));
QVERIFY(verifyConstExpr<uint(~(Qt::LeftButton | Qt::RightButton))>(~(Qt::LeftButton | Qt::RightButton)));
QVERIFY(verifyConstExpr<uint(Qt::MouseButtons(Qt::LeftButton) ^ Qt::RightButton)>(Qt::LeftButton ^ Qt::RightButton));
QVERIFY(verifyConstExpr<uint(Qt::MouseButtons(0))>(0));
QVERIFY(verifyConstExpr<uint(Qt::MouseButtons(Qt::RightButton) & 0xff)>(Qt::RightButton));
QVERIFY(verifyConstExpr<uint(Qt::MouseButtons(Qt::RightButton) | 0xff)>(0xff));
QVERIFY(!verifyConstExpr<Qt::RightButton>(~Qt::MouseButtons(Qt::LeftButton)));
#if defined(__cpp_constexpr) && __cpp_constexpr-0 >= 201304
QVERIFY(verifyConstExpr<uint(testRelaxedConstExpr())>(Qt::MiddleButton));
#endif
#endif
}
void tst_QFlags::signedness()
{
// these are all 'true' on GCC, but since the std says the
// underlying type is implementation-defined, we need to allow for
// a different signedness, so we only check that the relative
// signedness of the types matches:
Q_STATIC_ASSERT((std::is_unsigned<typename std::underlying_type<Qt::MouseButton>::type>::value ==
std::is_unsigned<Qt::MouseButtons::Int>::value));
Q_STATIC_ASSERT((std::is_signed<typename std::underlying_type<Qt::AlignmentFlag>::type>::value ==
std::is_signed<Qt::Alignment::Int>::value));
}
enum class MyStrictEnum { StrictZero, StrictOne, StrictTwo, StrictFour=4 };
Q_DECLARE_FLAGS( MyStrictFlags, MyStrictEnum )
Q_DECLARE_OPERATORS_FOR_FLAGS( MyStrictFlags )
enum class MyStrictNoOpEnum { StrictZero, StrictOne, StrictTwo, StrictFour=4 };
Q_DECLARE_FLAGS( MyStrictNoOpFlags, MyStrictNoOpEnum )
Q_STATIC_ASSERT( !QTypeInfo<MyStrictFlags>::isComplex );
Q_STATIC_ASSERT( !QTypeInfo<MyStrictFlags>::isStatic );
Q_STATIC_ASSERT( !QTypeInfo<MyStrictFlags>::isLarge );
Q_STATIC_ASSERT( !QTypeInfo<MyStrictFlags>::isPointer );
void tst_QFlags::classEnum()
{
// The main aim of the test is making sure it compiles
// The QCOMPARE are there as an extra
MyStrictEnum e1 = MyStrictEnum::StrictOne;
MyStrictEnum e2 = MyStrictEnum::StrictTwo;
MyStrictFlags f1(MyStrictEnum::StrictOne);
QCOMPARE(f1, 1);
MyStrictFlags f2(e2);
QCOMPARE(f2, 2);
MyStrictFlags f0;
QCOMPARE(f0, 0);
MyStrictFlags f3(e2 | e1);
QCOMPARE(f3, 3);
QVERIFY(f3.testFlag(MyStrictEnum::StrictOne));
QVERIFY(!f1.testFlag(MyStrictEnum::StrictTwo));
QVERIFY(!f0);
QCOMPARE(f3 & int(1), 1);
QCOMPARE(f3 & uint(1), 1);
QCOMPARE(f3 & MyStrictEnum::StrictOne, 1);
MyStrictFlags aux;
aux = f3;
aux &= int(1);
QCOMPARE(aux, 1);
aux = f3;
aux &= uint(1);
QCOMPARE(aux, 1);
aux = f3;
aux &= MyStrictEnum::StrictOne;
QCOMPARE(aux, 1);
aux = f3;
aux &= f1;
QCOMPARE(aux, 1);
aux = f3 ^ f3;
QCOMPARE(aux, 0);
aux = f3 ^ f1;
QCOMPARE(aux, 2);
aux = f3 ^ f0;
QCOMPARE(aux, 3);
aux = f3 ^ MyStrictEnum::StrictOne;
QCOMPARE(aux, 2);
aux = f3 ^ MyStrictEnum::StrictZero;
QCOMPARE(aux, 3);
aux = f3;
aux ^= f3;
QCOMPARE(aux, 0);
aux = f3;
aux ^= f1;
QCOMPARE(aux, 2);
aux = f3;
aux ^= f0;
QCOMPARE(aux, 3);
aux = f3;
aux ^= MyStrictEnum::StrictOne;
QCOMPARE(aux, 2);
aux = f3;
aux ^= MyStrictEnum::StrictZero;
QCOMPARE(aux, 3);
aux = f1 | f2;
QCOMPARE(aux, 3);
aux = MyStrictEnum::StrictOne | MyStrictEnum::StrictTwo;
QCOMPARE(aux, 3);
aux = f1;
aux |= f2;
QCOMPARE(aux, 3);
aux = MyStrictEnum::StrictOne;
aux |= MyStrictEnum::StrictTwo;
QCOMPARE(aux, 3);
aux = ~f1;
QCOMPARE(aux, -2);
// Just to make sure it compiles
if (false)
qDebug() << f3;
}
void tst_QFlags::initializerLists()
{
Qt::MouseButtons bts = { Qt::LeftButton, Qt::RightButton };
QVERIFY(bts.testFlag(Qt::LeftButton));
QVERIFY(bts.testFlag(Qt::RightButton));
QVERIFY(!bts.testFlag(Qt::MiddleButton));
MyStrictNoOpFlags flags = { MyStrictNoOpEnum::StrictOne, MyStrictNoOpEnum::StrictFour };
QVERIFY(flags.testFlag(MyStrictNoOpEnum::StrictOne));
QVERIFY(flags.testFlag(MyStrictNoOpEnum::StrictFour));
QVERIFY(!flags.testFlag(MyStrictNoOpEnum::StrictTwo));
}
void tst_QFlags::testSetFlags()
{
Qt::MouseButtons btn = Qt::NoButton;
btn.setFlag(Qt::LeftButton);
QVERIFY(btn.testFlag(Qt::LeftButton));
QVERIFY(!btn.testFlag(Qt::MiddleButton));
btn.setFlag(Qt::LeftButton, false);
QVERIFY(!btn.testFlag(Qt::LeftButton));
QVERIFY(!btn.testFlag(Qt::MiddleButton));
MyStrictFlags flags;
flags.setFlag(MyStrictEnum::StrictOne);
flags.setFlag(MyStrictEnum::StrictTwo, true);
QVERIFY(flags.testFlag(MyStrictEnum::StrictOne));
QVERIFY(flags.testFlag(MyStrictEnum::StrictTwo));
QVERIFY(!flags.testFlag(MyStrictEnum::StrictFour));
flags.setFlag(MyStrictEnum::StrictTwo, false);
QVERIFY(flags.testFlag(MyStrictEnum::StrictOne));
QVERIFY(!flags.testFlag(MyStrictEnum::StrictTwo));
QVERIFY(!flags.testFlag(MyStrictEnum::StrictFour));
}
namespace SomeNS {
enum Foo { Foo_A = 1 << 0, Foo_B = 1 << 1, Foo_C = 1 << 2 };
Q_DECLARE_FLAGS(Foos, Foo)
Q_DECLARE_OPERATORS_FOR_FLAGS(Foos);
Qt::Alignment alignment()
{
// Checks that the operator| works, despite there is another operator| in this namespace.
return Qt::AlignLeft | Qt::AlignTop;
}
}
void tst_QFlags::adl()
{
SomeNS::Foos fl = SomeNS::Foo_B | SomeNS::Foo_C;
QVERIFY(fl & SomeNS::Foo_B);
QVERIFY(!(fl & SomeNS::Foo_A));
QCOMPARE(SomeNS::alignment(), Qt::AlignLeft | Qt::AlignTop);
}
// (statically) check QTypeInfo for QFlags instantiations:
enum MyEnum { Zero, One, Two, Four=4 };
Q_DECLARE_FLAGS( MyFlags, MyEnum )
Q_DECLARE_OPERATORS_FOR_FLAGS( MyFlags )
Q_STATIC_ASSERT( !QTypeInfo<MyFlags>::isComplex );
Q_STATIC_ASSERT( !QTypeInfo<MyFlags>::isStatic );
Q_STATIC_ASSERT( !QTypeInfo<MyFlags>::isLarge );
Q_STATIC_ASSERT( !QTypeInfo<MyFlags>::isPointer );
QTEST_MAIN(tst_QFlags)
#include "tst_qflags.moc"
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