qt5base-lts/tests/auto/other/compiler/tst_compiler.cpp
Jason McDonald 1fdfc2abfe Update copyright year in license headers.
Change-Id: I02f2c620296fcd91d4967d58767ea33fc4e1e7dc
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
2012-01-05 06:36:56 +01:00

573 lines
15 KiB
C++

/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/QtCore>
#include <QtTest/QtTest>
#include <algorithm>
#define BASECLASS_NOT_ABSTRACT
#include "baseclass.h"
#include "derivedclass.h"
QT_USE_NAMESPACE
class tst_Compiler : public QObject
{
Q_OBJECT
private slots:
void template_methods();
void template_constructors();
void template_subclasses();
void methodSpecialization();
void constructorSpecialization();
void staticTemplateMethods();
void staticTemplateMethodSpecialization();
void detectDataStream();
void detectEnums();
void overrideCFunction();
void stdSortQList();
void stdSortQVector();
void templateCallOrder();
void virtualFunctionNoLongerPureVirtual();
void charSignedness() const;
void privateStaticTemplateMember() const;
void staticConstUnionWithInitializerList() const;
};
#if defined(Q_CC_HPACC)
# define DONT_TEST_TEMPLATE_CONSTRUCTORS
# define DONT_TEST_CONSTRUCTOR_SPECIALIZATION
# define DONT_TEST_DATASTREAM_DETECTION
#endif
#if defined(Q_CC_SUN)
# define DONT_TEST_STL_SORTING
#endif
class TemplateMethodClass
{
public:
template <class T>
T foo() { return 42; }
};
void tst_Compiler::template_methods()
{
TemplateMethodClass t;
QCOMPARE(t.foo<int>(), 42);
QCOMPARE(t.foo<long>(), 42l);
QCOMPARE(t.foo<double>(), 42.0);
}
#ifndef DONT_TEST_TEMPLATE_CONSTRUCTORS
class TemplateConstructorClass
{
public:
template <class T>
TemplateConstructorClass(const T& t) { i = int(t); }
int i;
};
void tst_Compiler::template_constructors()
{
TemplateConstructorClass t1(42);
TemplateConstructorClass t2(42l);
TemplateConstructorClass t3(42.0);
QCOMPARE(t1.i, 42);
QCOMPARE(t2.i, 42);
QCOMPARE(t3.i, 42);
}
#else
void tst_Compiler::template_constructors()
{ QSKIP("Compiler doesn't do template constructors"); }
#endif
template <typename T>
struct OuterClass
{
template <typename U>
struct InnerClass
{
U convert(const T &t) { return static_cast<U>(t); }
};
};
void tst_Compiler::template_subclasses()
{
OuterClass<char>::InnerClass<int> c1;
QCOMPARE(c1.convert('a'), int('a'));
OuterClass<QRect>::InnerClass<QRectF> c2;
QCOMPARE(c2.convert(QRect(1, 2, 3, 4)), QRectF(QRect(1, 2, 3, 4)));
}
class TemplateMethodClass2
{
public:
template <class T>
T foo() { return 42; }
};
template<>
int TemplateMethodClass2::foo<int>()
{ return 43; }
void tst_Compiler::methodSpecialization()
{
TemplateMethodClass2 t;
QCOMPARE(t.foo<int>(), 43);
QCOMPARE(t.foo<long>(), 42l);
QCOMPARE(t.foo<double>(), 42.0);
}
#ifndef DONT_TEST_CONSTRUCTOR_SPECIALIZATION
class TemplateConstructorClass2
{
public:
template <class T>
TemplateConstructorClass2(const T &t) { i = int(t); }
int i;
};
template<>
TemplateConstructorClass2::TemplateConstructorClass2(const int &t) { i = t + 1; }
void tst_Compiler::constructorSpecialization()
{
TemplateConstructorClass2 t1(42);
TemplateConstructorClass2 t2(42l);
TemplateConstructorClass2 t3(42.0);
QCOMPARE(t1.i, 43);
QCOMPARE(t2.i, 42);
QCOMPARE(t3.i, 42);
}
#else
void tst_Compiler::constructorSpecialization()
{ QSKIP("Compiler doesn't do constructor specialization"); }
#endif
class StaticTemplateClass
{
public:
template <class T>
static T foo() { return 42; }
};
void tst_Compiler::staticTemplateMethods()
{
QCOMPARE(StaticTemplateClass::foo<int>(), 42);
QCOMPARE(StaticTemplateClass::foo<uint>(), 42u);
}
class StaticTemplateClass2
{
public:
template <class T>
static T foo() { return 42; }
};
template<>
double StaticTemplateClass2::foo<double>() { return 18.5; }
void tst_Compiler::staticTemplateMethodSpecialization()
{
QCOMPARE(StaticTemplateClass2::foo<int>(), 42);
QCOMPARE(StaticTemplateClass2::foo<uint>(), 42u);
QCOMPARE(StaticTemplateClass2::foo<double>(), 18.5);
}
#ifndef DONT_TEST_DATASTREAM_DETECTION
/******* DataStream tester *********/
namespace QtTestInternal
{
struct EmptyStruct {};
struct LowPreferenceStruct { LowPreferenceStruct(...); };
EmptyStruct operator<<(QDataStream &, const LowPreferenceStruct &);
EmptyStruct operator>>(QDataStream &, const LowPreferenceStruct &);
template<typename T>
struct DataStreamChecker
{
static EmptyStruct hasStreamHelper(const EmptyStruct &);
static QDataStream hasStreamHelper(const QDataStream &);
static QDataStream &dsDummy();
static T &dummy();
#ifdef BROKEN_COMPILER
static const bool HasDataStream =
sizeof(hasStreamHelper(dsDummy() << dummy())) == sizeof(QDataStream)
&& sizeof(hasStreamHelper(dsDummy() >> dummy())) == sizeof(QDataStream);
#else
enum {
HasOutDataStream = sizeof(hasStreamHelper(dsDummy() >> dummy())) == sizeof(QDataStream),
HasInDataStream = sizeof(hasStreamHelper(dsDummy() << dummy())) == sizeof(QDataStream),
HasDataStream = HasOutDataStream & HasInDataStream
};
#endif
};
template<bool>
struct DataStreamOpHelper
{
template <typename T>
struct Getter {
static QMetaType::SaveOperator saveOp() { return 0; }
};
};
template<>
struct DataStreamOpHelper<true>
{
template <typename T>
struct Getter {
static QMetaType::SaveOperator saveOp()
{
typedef void(*SavePtr)(QDataStream &, const T *);
SavePtr op = ::qMetaTypeSaveHelper<T>;
return reinterpret_cast<QMetaType::SaveOperator>(op);
}
};
};
template<typename T>
inline QMetaType::SaveOperator getSaveOperator(T * = 0)
{
typedef typename DataStreamOpHelper<DataStreamChecker<T>::HasDataStream>::template Getter<T> GetterHelper;
return GetterHelper::saveOp();
}
};
struct MyString: public QString {};
struct Qxxx {};
void tst_Compiler::detectDataStream()
{
QVERIFY(QtTestInternal::DataStreamChecker<int>::HasDataStream == true);
QVERIFY(QtTestInternal::DataStreamChecker<uint>::HasDataStream == true);
QVERIFY(QtTestInternal::DataStreamChecker<char *>::HasDataStream == true);
QVERIFY(QtTestInternal::DataStreamChecker<const int>::HasInDataStream == true);
QVERIFY(QtTestInternal::DataStreamChecker<const int>::HasOutDataStream == false);
QVERIFY(QtTestInternal::DataStreamChecker<const int>::HasDataStream == false);
QVERIFY(QtTestInternal::DataStreamChecker<double>::HasDataStream == true);
QVERIFY(QtTestInternal::DataStreamChecker<QString>::HasDataStream == true);
QVERIFY(QtTestInternal::DataStreamChecker<MyString>::HasDataStream == true);
QVERIFY(QtTestInternal::DataStreamChecker<Qxxx>::HasDataStream == false);
QVERIFY(QtTestInternal::getSaveOperator<int>() != 0);
QVERIFY(QtTestInternal::getSaveOperator<uint>() != 0);
QVERIFY(QtTestInternal::getSaveOperator<char *>() != 0);
QVERIFY(QtTestInternal::getSaveOperator<double>() != 0);
QVERIFY(QtTestInternal::getSaveOperator<QString>() != 0);
QVERIFY(QtTestInternal::getSaveOperator<MyString>() != 0);
QVERIFY(QtTestInternal::getSaveOperator<Qxxx>() == 0);
}
#else
void tst_Compiler::detectDataStream()
{ QSKIP("Compiler doesn't evaluate templates correctly"); }
#endif
enum Enum1 { Foo = 0, Bar = 1 };
enum Enum2 {};
enum Enum3 { Something = 1 };
template <typename T> char QTypeInfoEnumHelper(T);
template <typename T> void *QTypeInfoEnumHelper(...);
template <typename T>
struct QTestTypeInfo
{
enum { IsEnum = sizeof(QTypeInfoEnumHelper<T>(0)) == sizeof(void*) };
};
void tst_Compiler::detectEnums()
{
QVERIFY(QTestTypeInfo<Enum1>::IsEnum);
QVERIFY(QTestTypeInfo<Enum2>::IsEnum);
QVERIFY(QTestTypeInfo<Enum3>::IsEnum);
QVERIFY(!QTestTypeInfo<int>::IsEnum);
QVERIFY(!QTestTypeInfo<char>::IsEnum);
QVERIFY(!QTestTypeInfo<uint>::IsEnum);
QVERIFY(!QTestTypeInfo<short>::IsEnum);
QVERIFY(!QTestTypeInfo<ushort>::IsEnum);
QVERIFY(!QTestTypeInfo<void*>::IsEnum);
QVERIFY(!QTestTypeInfo<QString>::IsEnum);
QVERIFY(QTestTypeInfo<Qt::Key>::IsEnum);
QVERIFY(QTestTypeInfo<Qt::ToolBarArea>::IsEnum);
QVERIFY(!QTestTypeInfo<Qt::ToolBarAreas>::IsEnum);
QVERIFY(QTestTypeInfo<Qt::MatchFlag>::IsEnum);
QVERIFY(!QTestTypeInfo<Qt::MatchFlags>::IsEnum);
}
static int indicator = 0;
// this is a silly C function
extern "C" {
void someCFunc(void *) { indicator = 42; }
}
// this is the catch-template that will be called if the C function doesn't exist
template <typename T>
void someCFunc(T *) { indicator = 10; }
void tst_Compiler::overrideCFunction()
{
someCFunc((void*)0);
QCOMPARE(indicator, 42);
}
#ifndef DONT_TEST_STL_SORTING
void tst_Compiler::stdSortQList()
{
QList<int> list;
list << 4 << 2;
std::sort(list.begin(), list.end());
QCOMPARE(list.value(0), 2);
QCOMPARE(list.value(1), 4);
QList<QString> slist;
slist << "b" << "a";
std::sort(slist.begin(), slist.end());
QCOMPARE(slist.value(0), QString("a"));
QCOMPARE(slist.value(1), QString("b"));
}
void tst_Compiler::stdSortQVector()
{
QVector<int> vector;
vector << 4 << 2;
std::sort(vector.begin(), vector.end());
QCOMPARE(vector.value(0), 2);
QCOMPARE(vector.value(1), 4);
QVector<QString> strvec;
strvec << "b" << "a";
std::sort(strvec.begin(), strvec.end());
QCOMPARE(strvec.value(0), QString("a"));
QCOMPARE(strvec.value(1), QString("b"));
}
#else
void tst_Compiler::stdSortQList()
{ QSKIP("Compiler's STL broken"); }
void tst_Compiler::stdSortQVector()
{ QSKIP("Compiler's STL broken"); }
#endif
// the C func will set it to 1, the template to 2
static int whatWasCalled = 0;
void callOrderFunc(void *)
{
whatWasCalled = 1;
}
template <typename T>
void callOrderFunc(T *)
{
whatWasCalled = 2;
}
template <typename T>
void callOrderNoCFunc(T *)
{
whatWasCalled = 3;
}
/*
This test will check what will get precendence - the C function
or the template.
It also makes sure this template "override" will compile on all systems
and not result in ambiguities.
*/
void tst_Compiler::templateCallOrder()
{
QCOMPARE(whatWasCalled, 0);
// call it with a void *
void *f = 0;
callOrderFunc(f);
QCOMPARE(whatWasCalled, 1);
whatWasCalled = 0;
char *c = 0;
/* call it with a char * - AMBIGOUS, fails on several compilers
callOrderFunc(c);
QCOMPARE(whatWasCalled, 1);
whatWasCalled = 0;
*/
// now try the case when there is no C function
callOrderNoCFunc(f);
QCOMPARE(whatWasCalled, 3);
whatWasCalled = 0;
callOrderNoCFunc(c);
QCOMPARE(whatWasCalled, 3);
whatWasCalled = 0;
}
// test to see if removing =0 from a pure virtual function is BC
void tst_Compiler::virtualFunctionNoLongerPureVirtual()
{
#ifdef BASECLASS_NOT_ABSTRACT
// has a single virtual function, not pure virtual, can call it
BaseClass baseClass;
QTest::ignoreMessage(QtDebugMsg, "BaseClass::wasAPureVirtualFunction()");
baseClass.wasAPureVirtualFunction();
#endif
// DerivedClass inherits from BaseClass, and function is declared
// pure virtual, make sure we can still call it
DerivedClass derivedClass;
QTest::ignoreMessage(QtDebugMsg, "DerivedClass::wasAPureVirtualFunction()");
derivedClass.wasAPureVirtualFunction();
}
template<typename T> const char *resolveCharSignedness();
template<>
const char *resolveCharSignedness<char>()
{
return "char";
}
template<>
const char *resolveCharSignedness<unsigned char>()
{
return "unsigned char";
}
template<>
const char *resolveCharSignedness<signed char>()
{
return "signed char";
}
void tst_Compiler::charSignedness() const
{
QCOMPARE("char", resolveCharSignedness<char>());
QCOMPARE("unsigned char", resolveCharSignedness<unsigned char>());
QCOMPARE("signed char", resolveCharSignedness<signed char>());
}
class PrivateStaticTemplateMember
{
public:
long regularMember()
{
return helper<long, int>(3);
}
private:
template<typename A, typename B>
static A helper(const B b)
{
return A(b);
}
};
void tst_Compiler::privateStaticTemplateMember() const
{
PrivateStaticTemplateMember v;
QCOMPARE(long(3), v.regularMember());
}
#if !defined(Q_CC_MIPS)
// make sure we can use a static initializer with a union and then use
// the second member of the union
static const union { unsigned char c[8]; double d; } qt_be_inf_bytes = { { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 } };
static const union { unsigned char c[8]; double d; } qt_le_inf_bytes = { { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } };
static const union { unsigned char c[8]; double d; } qt_armfpa_inf_bytes = { { 0, 0, 0xf0, 0x7f, 0, 0, 0, 0 } };
static inline double qt_inf()
{
#ifdef QT_ARMFPA
return qt_armfpa_inf_bytes.d;
#else
return (QSysInfo::ByteOrder == QSysInfo::BigEndian
? qt_be_inf_bytes.d
: qt_le_inf_bytes.d);
#endif
}
#else
static const unsigned char qt_be_inf_bytes[] = { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 };
static const unsigned char qt_le_inf_bytes[] = { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f };
static const unsigned char qt_armfpa_inf_bytes[] = { 0, 0, 0xf0, 0x7f, 0, 0, 0, 0 };
static inline double qt_inf()
{
const uchar *bytes;
#ifdef QT_ARMFPA
bytes = qt_armfpa_inf_bytes;
#else
bytes = (QSysInfo::ByteOrder == QSysInfo::BigEndian
? qt_be_inf_bytes
: qt_le_inf_bytes);
#endif
union { uchar c[8]; double d; } returnValue;
memcpy(returnValue.c, bytes, sizeof(returnValue.c));
return returnValue.d;
}
#endif
void tst_Compiler::staticConstUnionWithInitializerList() const
{
double d = qt_inf();
QVERIFY(qIsInf(d));
}
QTEST_MAIN(tst_Compiler)
#include "tst_compiler.moc"