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qt5base-lts/tests/auto/other/compiler/tst_compiler.cpp
Friedemann Kleint 5af4cb5a5a Tests: Raise minimum supported MSVC version to 2015 
Remove code for older versions and streamline #ifdefs.

Task-number: QTBUG-51673
Change-Id: If456567691538b1a1f452111814c5f9eba401c43
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2018-01-04 20:23:25 +00:00

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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2017 Intel Corporation.
** 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 <QtCore/QtCore>
#include <QtTest/QtTest>
#include <algorithm>
#define BASECLASS_NOT_ABSTRACT
#include "baseclass.h"
#include "derivedclass.h"
#ifdef Q_COMPILER_ATOMICS
# include <atomic>
#endif
QT_USE_NAMESPACE
class tst_Compiler : public QObject
{
Q_OBJECT
private slots:
/* C++98 & C++03 base functionality */
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;
void templateFriends();
/* C++11 features */
void cxx11_alignas();
void cxx11_alignof();
void cxx11_alignas_alignof();
void cxx11_atomics();
void cxx11_attributes();
void cxx11_auto_function();
void cxx11_auto_type();
void cxx11_class_enum();
void cxx11_constexpr();
void cxx11_decltype();
void cxx11_default_members();
void cxx11_delete_members();
void cxx11_delegating_constructors();
void cxx11_explicit_conversions();
void cxx11_explicit_overrides();
void cxx11_extern_templates();
void cxx11_inheriting_constructors();
void cxx11_initializer_lists();
void cxx11_lambda();
void cxx11_nonstatic_member_init();
void cxx11_noexcept();
void cxx11_nullptr();
void cxx11_range_for();
void cxx11_raw_strings();
void cxx11_ref_qualifiers();
void cxx11_rvalue_refs();
void cxx11_static_assert();
void cxx11_template_alias();
void cxx11_thread_local();
void cxx11_udl();
void cxx11_unicode_strings();
void cxx11_uniform_init();
void cxx11_unrestricted_unions();
void cxx11_variadic_macros();
void cxx11_variadic_templates();
/* C++14 compiler features */
void cxx14_binary_literals();
void cxx14_init_captures();
void cxx14_generic_lambdas();
void cxx14_constexpr();
void cxx14_decltype_auto();
void cxx14_return_type_deduction();
void cxx14_aggregate_nsdmi();
void cxx14_variable_templates();
/* Future / Technical specification compiler features */
void runtimeArrays();
};
#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()
{
return ::QtMetaTypePrivate::QMetaTypeFunctionHelper<T>::Save;
}
};
};
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);
QVERIFY(QtTestInternal::DataStreamChecker<uint>::HasDataStream);
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);
QVERIFY(QtTestInternal::DataStreamChecker<QString>::HasDataStream);
QVERIFY(QtTestInternal::DataStreamChecker<MyString>::HasDataStream);
QVERIFY(!QtTestInternal::DataStreamChecker<Qxxx>::HasDataStream);
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>());
}
#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 inline double qt_inf()
{
return (QSysInfo::ByteOrder == QSysInfo::BigEndian
? qt_be_inf_bytes.d
: qt_le_inf_bytes.d);
}
#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 inline double qt_inf()
{
const uchar *bytes;
bytes = (QSysInfo::ByteOrder == QSysInfo::BigEndian
? qt_be_inf_bytes
: qt_le_inf_bytes);
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));
}
#ifndef Q_NO_TEMPLATE_FRIENDS
template <typename T> class TemplateFriends
{
T value;
public:
TemplateFriends(T value) : value(value) {}
template <typename X> void copy(TemplateFriends<X> other)
{ value = other.value; }
template <typename X> friend class TemplateFriends;
};
void tst_Compiler::templateFriends()
{
TemplateFriends<int> ti(42);
TemplateFriends<long> tl(0);
tl.copy(ti);
}
#else
void tst_Compiler::templateFriends()
{
QSKIP("Compiler does not support template friends");
}
#endif
void tst_Compiler::cxx11_alignas()
{
#ifndef Q_COMPILER_ALIGNAS
QSKIP("Compiler does not support C++11 feature");
#else
struct S {
alignas(double) char c;
};
QCOMPARE(Q_ALIGNOF(S), Q_ALIGNOF(double));
#endif
}
void tst_Compiler::cxx11_alignof()
{
#ifndef Q_COMPILER_ALIGNOF
QSKIP("Compiler does not support C++11 feature");
#else
size_t alignchar = alignof(char);
size_t aligndouble = alignof(double);
QVERIFY(alignchar >= 1);
QVERIFY(alignchar <= aligndouble);
#endif
}
void tst_Compiler::cxx11_alignas_alignof()
{
#if !defined(Q_COMPILER_ALIGNAS) && !defined(Q_COMPILER_ALIGNOF)
QSKIP("Compiler does not support C++11 feature");
#else
alignas(alignof(double)) char c;
Q_UNUSED(c);
#endif
}
void tst_Compiler::cxx11_atomics()
{
#ifndef Q_COMPILER_ATOMICS
QSKIP("Compiler does not support C++11 feature");
#else
std::atomic<int> i;
i.store(42, std::memory_order_seq_cst);
QCOMPARE(i.load(std::memory_order_acquire), 42);
std::atomic<short> s;
s.store(42);
QCOMPARE(s.load(), short(42));
std::atomic_flag flag;
flag.clear();
QVERIFY(!flag.test_and_set());
QVERIFY(flag.test_and_set());
#endif
}
QT_WARNING_PUSH
QT_WARNING_DISABLE_CLANG("-Wignored-attributes")
QT_WARNING_DISABLE_CLANG("-Wunused-local-typedefs")
QT_WARNING_DISABLE_GCC("-Wattributes")
QT_WARNING_DISABLE_GCC("-Wunused-local-typedefs")
#ifndef __has_cpp_attribute
# define __has_cpp_attribute(x) 0
#endif
#ifdef Q_COMPILER_ATTRIBUTES
[[noreturn]] void attribute_f1();
void attribute_f2 [[noreturn]] ();
# if (defined(__cpp_namespace_attributes) && __cpp_namespace_attributes >= 201411) && __has_cpp_attribute(deprecated)
namespace NS [[deprecated]] { }
# endif
#endif
void tst_Compiler::cxx11_attributes()
{
#ifndef Q_COMPILER_ATTRIBUTES
QSKIP("Compiler does not support C++11 feature");
#else
// Attributes in function parameters and using clauses cause MSVC 2015 to crash
// https://connect.microsoft.com/VisualStudio/feedback/details/2011594
# if (!defined(Q_CC_MSVC) || _MSC_FULL_VER >= 190023811) && !defined(Q_CC_INTEL)
void f([[ ]] int);
[[ ]] using namespace QtPrivate;
[[ ]] try {
} catch ([[]] int) {
}
# endif
struct [[ ]] A { };
struct B : A {
[[ ]] int m_i : 32;
[[noreturn]] void f() const { ::exit(0); }
# ifdef Q_COMPILER_DEFAULT_DELETE_MEMBERS
[[ ]] ~B() = default;
[[ ]] B(const B &) = delete;
# endif
};
# if __has_cpp_attribute(deprecated)
struct [[deprecated]] C { };
# endif
enum [[ ]] E { };
[[ ]] void [[ ]] * [[ ]] * [[ ]] ptr = 0;
int B::* [[ ]] pmm = 0;
# if __has_cpp_attribute(deprecated)
enum [[deprecated]] E2 {
# if defined(__cpp_enumerator_attributes) && __cpp_enumerator_attributes >= 201411
value [[deprecated]] = 0
# endif
};
# endif
# ifdef Q_COMPILER_LAMBDA
[]()[[ ]] {}();
# endif
# ifdef Q_COMPILER_TEMPLATE_ALIAS
using B2 [[ ]] = B;
# endif
[[ ]] goto end;
# ifdef Q_CC_GNU
// Attributes in gnu:: namespace
[[gnu::unused]] end:
;
[[gnu::unused]] struct D {} d;
struct D e [[gnu::used, gnu::unused]];
[[gnu::aligned(8)]] int i [[ ]];
int array[][[]] = { 1 };
# else
// Non GNU, so use an empty attribute
[[ ]] end:
;
[[ ]] struct D {} d;
struct D e [[ ]];
[[ ]] int i [[ ]];
int array[][[]] = { 1 };
# endif
int & [[ ]] lref = i;
int && [[ ]] rref = 1;
[[ ]] (void)1;
[[ ]] for (i = 0; i < 2; ++i)
;
Q_UNUSED(ptr);
Q_UNUSED(pmm);
Q_UNUSED(d);
Q_UNUSED(e);
Q_UNUSED(i);
Q_UNUSED(array);
Q_UNUSED(lref);
Q_UNUSED(rref);
#endif
}
QT_WARNING_POP
#ifdef Q_COMPILER_AUTO_FUNCTION
auto autoFunction() -> unsigned
{
return 1;
}
#endif
void tst_Compiler::cxx11_auto_function()
{
#ifndef Q_COMPILER_AUTO_FUNCTION
QSKIP("Compiler does not support C++11 feature");
#else
QCOMPARE(autoFunction(), 1u);
#endif
}
void tst_Compiler::cxx11_auto_type()
{
#ifndef Q_COMPILER_AUTO_TYPE
QSKIP("Compiler does not support C++11 feature");
#else
auto i = 1;
auto x = QRandomGenerator::global()->generate();
auto l = 1L;
auto s = QStringLiteral("Hello World");
QCOMPARE(i, 1);
Q_UNUSED(x);
QCOMPARE(l, 1L);
QCOMPARE(s.toLower(), QString("hello world"));
#endif
}
void tst_Compiler::cxx11_class_enum()
{
#ifndef Q_COMPILER_CLASS_ENUM
QSKIP("Compiler does not support C++11 feature");
#else
enum class X { EnumValue };
X x = X::EnumValue;
QCOMPARE(x, X::EnumValue);
enum class Y : short { Val = 2 };
enum Z : long { ValLong = LONG_MAX };
#endif
}
#ifdef Q_COMPILER_CONSTEXPR
constexpr int constexprValue()
{
return 42;
}
#endif
void tst_Compiler::cxx11_constexpr()
{
#ifndef Q_COMPILER_CONSTEXPR
QSKIP("Compiler does not support C++11 feature");
#else
static constexpr QBasicAtomicInt atomic = Q_BASIC_ATOMIC_INITIALIZER(1);
static constexpr int i = constexprValue();
QCOMPARE(i, constexprValue());
QCOMPARE(atomic.load(), 1);
#endif
}
void tst_Compiler::cxx11_decltype()
{
#ifndef Q_COMPILER_DECLTYPE
QSKIP("Compiler does not support C++11 feature");
#else
decltype(QRandomGenerator::global()->generate()) i = 0;
QCOMPARE(i, 0U);
#endif
}
void tst_Compiler::cxx11_default_members()
{
#ifndef Q_COMPILER_DEFAULT_MEMBERS
QSKIP("Compiler does not support C++11 feature");
#else
class DefaultMembers
{
protected:
DefaultMembers() = default;
public:
DefaultMembers(int) {}
};
class DefaultMembersChild: public DefaultMembers
{
DefaultMembersChild(const DefaultMembersChild &) : DefaultMembers() {}
public:
DefaultMembersChild():DefaultMembers() {};
DefaultMembersChild(DefaultMembersChild &&) = default;
};
DefaultMembersChild dm;
DefaultMembersChild dm2 = std::move(dm);
Q_UNUSED(dm2);
#endif
}
void tst_Compiler::cxx11_delete_members()
{
#ifndef Q_COMPILER_DELETE_MEMBERS
QSKIP("Compiler does not support C++11 feature");
#else
class DeleteMembers
{
protected:
DeleteMembers() = delete;
public:
DeleteMembers(const DeleteMembers &) = delete;
~DeleteMembers() = delete;
};
#endif
}
void tst_Compiler::cxx11_delegating_constructors()
{
#ifndef Q_COMPILER_DELEGATING_CONSTRUCTORS
QSKIP("Compiler does not support C++11 feature");
#else
struct DC {
DC(int i) : i(i) {}
DC() : DC(0) {}
int i;
};
DC dc;
QCOMPARE(dc.i, 0);
#endif
}
void tst_Compiler::cxx11_explicit_conversions()
{
#ifndef Q_COMPILER_EXPLICIT_CONVERSIONS
QSKIP("Compiler does not support C++11 feature");
#else
struct EC {
explicit operator int() const { return 0; }
operator long long() const { return 1; }
};
EC ec;
int i(ec);
QCOMPARE(i, 0);
int i2 = ec;
QCOMPARE(i2, 1);
#endif
}
void tst_Compiler::cxx11_explicit_overrides()
{
#ifndef Q_COMPILER_EXPLICIT_OVERRIDES
QSKIP("Compiler does not support C++11 feature");
#else
struct Base {
virtual ~Base() {}
virtual void f() {}
};
struct Derived final : public Base {
virtual void f() final override {}
};
#endif
}
#ifdef Q_COMPILER_EXTERN_TEMPLATES
template <typename T> T externTemplate() { return T(0); }
extern template int externTemplate<int>();
#endif
void tst_Compiler::cxx11_extern_templates()
{
#ifndef Q_COMPILER_EXTERN_TEMPLATES
QSKIP("Compiler does not support C++11 feature");
#else
QCOMPARE(externTemplate<int>(), 42);
#endif
}
void tst_Compiler::cxx11_inheriting_constructors()
{
#ifndef Q_COMPILER_INHERITING_CONSTRUCTORS
QSKIP("Compiler does not support C++11 feature");
#else
struct Base {
int i;
Base() : i(0) {}
Base(int i) : i(i) {}
};
struct Derived : public Base {
using Base::Base;
};
Derived d(1);
QCOMPARE(d.i, 1);
#endif
}
void tst_Compiler::cxx11_initializer_lists()
{
#ifndef Q_COMPILER_INITIALIZER_LISTS
QSKIP("Compiler does not support C++11 feature");
#else
QList<int> l = { 1, 2, 3, 4, 5 };
QCOMPARE(l.length(), 5);
QCOMPARE(l.at(0), 1);
QCOMPARE(l.at(4), 5);
#endif
}
struct CallFunctor
{
template <typename Functor> static int f(Functor f)
{ return f();}
};
void tst_Compiler::cxx11_lambda()
{
#ifndef Q_COMPILER_LAMBDA
QSKIP("Compiler does not support C++11 feature");
#else
QCOMPARE(CallFunctor::f([]() { return 42; }), 42);
#endif
}
void tst_Compiler::cxx11_nonstatic_member_init()
{
#ifndef Q_COMPILER_NONSTATIC_MEMBER_INIT
QSKIP("Compiler does not support C++11 feature");
#else
struct S {
int i = 42;
long l = 47;
char c;
S() : l(-47), c(0) {}
};
S s;
QCOMPARE(s.i, 42);
QCOMPARE(s.l, -47L);
QCOMPARE(s.c, '\0');
#endif
}
void tst_Compiler::cxx11_noexcept()
{
#ifndef Q_COMPILER_NOEXCEPT
QSKIP("Compiler does not support C++11 feature");
#else
extern void noexcept_f() noexcept;
extern void g() noexcept(noexcept(noexcept_f()));
QCOMPARE(noexcept(cxx11_noexcept()), false);
QCOMPARE(noexcept(noexcept_f), true);
QCOMPARE(noexcept(g), true);
#endif
}
void tst_Compiler::cxx11_nullptr()
{
#ifndef Q_COMPILER_NULLPTR
QSKIP("Compiler does not support C++11 feature");
#else
void *v = nullptr;
char *c = nullptr;
const char *cc = nullptr;
volatile char *vc = nullptr;
std::nullptr_t np = nullptr;
v = np;
Q_UNUSED(v);
Q_UNUSED(c);
Q_UNUSED(cc);
Q_UNUSED(vc);
#endif
}
namespace SomeNamespace {
class AdlOnly {
QVector<int> v;
public:
AdlOnly() : v(5) { std::fill_n(v.begin(), v.size(), 42); }
private:
friend QVector<int>::const_iterator begin(const AdlOnly &x) { return x.v.begin(); }
friend QVector<int>::const_iterator end(const AdlOnly &x) { return x.v.end(); }
friend QVector<int>::iterator begin(AdlOnly &x) { return x.v.begin(); }
friend QVector<int>::iterator end(AdlOnly &x) { return x.v.end(); }
};
}
void tst_Compiler::cxx11_range_for()
{
#ifndef Q_COMPILER_RANGE_FOR
QSKIP("Compiler does not support C++11 feature");
#else
QList<int> l;
l << 1 << 2 << 3;
for (int i : l)
Q_UNUSED(i);
l.clear();
l << 1;
for (int i : l)
QCOMPARE(i, 1);
QList<long> ll;
l << 2;
for (int i : ll)
QCOMPARE(i, 2);
{
const int array[] = { 0, 1, 2, 3, 4 };
int i = 0;
for (const int &e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (int e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (const int e : array)
QCOMPARE(e, array[i++]);
#ifdef Q_COMPILER_AUTO_TYPE
i = 0;
for (const auto &e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (auto &e : array) // auto deducing const
QCOMPARE(e, array[i++]);
i = 0;
for (auto e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (const auto e : array)
QCOMPARE(e, array[i++]);
#endif
}
{
int array[] = { 0, 1, 2, 3, 4 };
const int array2[] = { 10, 11, 12, 13, 14 };
int i = 0;
for (const int &e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (int &e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (int e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (const int e : array)
QCOMPARE(e, array[i++]);
#ifdef Q_COMPILER_AUTO_TYPE
i = 0;
for (const auto &e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (auto &e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (auto e : array)
QCOMPARE(e, array[i++]);
i = 0;
for (const auto e : array)
QCOMPARE(e, array[i++]);
#endif
for (int &e : array)
e += 10;
i = 0;
for (const int &e : array)
QCOMPARE(e, array2[i++]);
}
{
const SomeNamespace::AdlOnly x;
for (const int &e : x)
QCOMPARE(e, 42);
}
{
SomeNamespace::AdlOnly x;
for (const int &e : x)
QCOMPARE(e, 42);
for (int &e : x)
e += 10;
for (const int &e : x)
QCOMPARE(e, 52);
}
#endif
}
void tst_Compiler::cxx11_raw_strings()
{
#ifndef Q_COMPILER_RAW_STRINGS
QSKIP("Compiler does not support C++11 feature");
#else
static const char xml[] = R"(<?xml version="1.0" encoding="UTF-8" ?>)";
static const char raw[] = R"***(*"*)***";
QCOMPARE(strlen(raw), size_t(3));
QCOMPARE(raw[1], '"');
Q_UNUSED(xml);
#endif
}
void tst_Compiler::cxx11_ref_qualifiers()
{
#ifndef Q_COMPILER_REF_QUALIFIERS
QSKIP("Compiler does not support C++11 feature");
#else
# ifndef Q_COMPILER_RVALUE_REFS
# error "Impossible condition: ref qualifiers are supported but not rvalue refs"
# endif
// also applies to function pointers
QByteArray (QString:: *lvalueref)() const & = &QString::toLatin1;
QByteArray (QString:: *rvalueref)() && = &QString::toLatin1;
QString s("Hello");
QCOMPARE((s.*lvalueref)(), QByteArray("Hello"));
QCOMPARE((std::move(s).*rvalueref)(), QByteArray("Hello"));
// tests internal behavior:
QVERIFY(s.isEmpty());
#endif
}
class MoveDefinedQString {
QString s;
public:
MoveDefinedQString() : s() {}
explicit MoveDefinedQString(const QString &s) : s(s) {}
MoveDefinedQString(const MoveDefinedQString &other) : s(other.s) {}
#ifdef Q_COMPILER_RVALUE_REFS
MoveDefinedQString(MoveDefinedQString &&other) : s(std::move(other.s)) { other.s.clear(); }
MoveDefinedQString &operator=(MoveDefinedQString &&other)
{ s = std::move(other.s); other.s.clear(); return *this; }
#endif
MoveDefinedQString &operator=(const MoveDefinedQString &other) { s = other.s; return *this; }
private:
friend bool operator==(const MoveDefinedQString &lhs, const MoveDefinedQString &rhs)
{ return lhs.s == rhs.s; }
friend bool operator!=(const MoveDefinedQString &lhs, const MoveDefinedQString &rhs)
{ return !operator==(lhs, rhs); }
friend char* toString(const MoveDefinedQString &mds)
{ using namespace QTest; return toString(mds.s); }
};
void tst_Compiler::cxx11_rvalue_refs()
{
#ifndef Q_COMPILER_RVALUE_REFS
QSKIP("Compiler does not support C++11 feature");
#else
// we require std::move:
{
int i = 1;
i = std::move(i);
MoveDefinedQString s("Hello");
MoveDefinedQString t = std::move(s);
QCOMPARE(t, MoveDefinedQString("Hello"));
QCOMPARE(s, MoveDefinedQString());
s = t;
t = std::move(s);
QCOMPARE(t, MoveDefinedQString("Hello"));
QCOMPARE(s, MoveDefinedQString());
MoveDefinedQString &&r = std::move(t); // no actual move!
QCOMPARE(r, MoveDefinedQString("Hello"));
QCOMPARE(t, MoveDefinedQString("Hello")); // so 't' is unchanged
}
// we require std::forward:
{
MoveDefinedQString s("Hello");
MoveDefinedQString s2 = std::forward<MoveDefinedQString>(s); // forward as rvalue
QCOMPARE(s2, MoveDefinedQString("Hello"));
QCOMPARE(s, MoveDefinedQString());
MoveDefinedQString s3 = std::forward<MoveDefinedQString&>(s2); // forward as lvalue
QCOMPARE(s2, MoveDefinedQString("Hello"));
QCOMPARE(s3, MoveDefinedQString("Hello"));
}
// we require automatic generation of move special member functions:
{
struct M { MoveDefinedQString s1, s2; };
M m1 = { MoveDefinedQString("Hello"), MoveDefinedQString("World") };
QCOMPARE(m1.s1, MoveDefinedQString("Hello"));
QCOMPARE(m1.s2, MoveDefinedQString("World"));
M m2 = std::move(m1);
QCOMPARE(m1.s1, MoveDefinedQString());
QCOMPARE(m1.s2, MoveDefinedQString());
QCOMPARE(m2.s1, MoveDefinedQString("Hello"));
QCOMPARE(m2.s2, MoveDefinedQString("World"));
M m3;
QCOMPARE(m3.s1, MoveDefinedQString());
QCOMPARE(m3.s2, MoveDefinedQString());
m3 = std::move(m2);
QCOMPARE(m2.s1, MoveDefinedQString());
QCOMPARE(m2.s2, MoveDefinedQString());
QCOMPARE(m3.s1, MoveDefinedQString("Hello"));
QCOMPARE(m3.s2, MoveDefinedQString("World"));
}
#endif
}
void tst_Compiler::cxx11_static_assert()
{
#ifndef Q_COMPILER_STATIC_ASSERT
QSKIP("Compiler does not support C++11 feature");
#else
static_assert(true, "Message");
#endif
}
#ifdef Q_COMPILER_TEMPLATE_ALIAS
template <typename T> using Map = QMap<QString, T>;
#endif
void tst_Compiler::cxx11_template_alias()
{
#ifndef Q_COMPILER_TEMPLATE_ALIAS
QSKIP("Compiler does not support C++11 feature");
#else
Map<QVariant> m;
m.insert("Hello", "World");
QCOMPARE(m.value("Hello").toString(), QString("World"));
using X = int;
X i = 0;
Q_UNUSED(i);
#endif
}
#ifdef Q_COMPILER_THREAD_LOCAL
static thread_local int stl = 42;
thread_local int gtl = 42;
#endif
void tst_Compiler::cxx11_thread_local()
{
#ifndef Q_COMPILER_THREAD_LOCAL
QSKIP("Compiler does not support C++11 feature");
#else
thread_local int v = 1;
QVERIFY(v);
QVERIFY(stl);
QVERIFY(gtl);
thread_local QString s = "Hello";
QVERIFY(!s.isEmpty());
#endif
}
#ifdef Q_COMPILER_UDL
QString operator"" _tstqstring(const char *str, size_t len)
{
return QString::fromUtf8(str, len) + " UDL";
}
#endif
void tst_Compiler::cxx11_udl()
{
#ifndef Q_COMPILER_UDL
QSKIP("Compiler does not support C++11 feature");
#else
QString s = "Hello World"_tstqstring;
QCOMPARE(s, QString("Hello World UDL"));
#endif
}
void tst_Compiler::cxx11_unicode_strings()
{
#ifndef Q_COMPILER_UNICODE_STRINGS
QSKIP("Compiler does not support C++11 feature");
#else
static const char16_t u[] = u"\u200BHello\u00A0World";
QCOMPARE(u[0], char16_t(0x200B));
static const char32_t U[] = U"\ufffe";
QCOMPARE(U[0], char32_t(0xfffe));
QCOMPARE(u"\U00010000"[0], char16_t(0xD800));
QCOMPARE(u"\U00010000"[1], char16_t(0xDC00));
#endif
}
static void noop(QPair<int, int>) {}
void tst_Compiler::cxx11_uniform_init()
{
#ifndef Q_COMPILER_UNIFORM_INIT
QSKIP("Compiler does not support C++11 feature");
noop(QPair<int,int>());
#else
QString s{"Hello"};
int i{};
noop(QPair<int,int>{1,1});
noop({i,1});
#endif
}
void tst_Compiler::cxx11_unrestricted_unions()
{
#ifndef Q_COMPILER_UNRESTRICTED_UNIONS
QSKIP("Compiler does not support C++11 feature");
#else
union U {
QString s;
U() {}
U(const QString &s) : s(s) {}
~U() {}
};
U u;
std::aligned_storage<sizeof(QString), Q_ALIGNOF(QString)> as;
Q_UNUSED(u);
Q_UNUSED(as);
U u2("hello");
u2.s.~QString();
#endif
}
void tst_Compiler::cxx11_variadic_macros()
{
#ifndef Q_COMPILER_VARIADIC_MACROS
QSKIP("Compiler does not support C++11 feature");
#else
# define TEST_VARARG(x, ...) __VA_ARGS__
QCOMPARE(TEST_VARARG(0, 1), 1);
#endif
}
#ifdef Q_COMPILER_VARIADIC_TEMPLATES
template <typename... Args> struct VariadicTemplate {};
#endif
void tst_Compiler::cxx11_variadic_templates()
{
#ifndef Q_COMPILER_VARIADIC_TEMPLATES
QSKIP("Compiler does not support C++11 feature");
#else
VariadicTemplate<> v0;
VariadicTemplate<int> v1;
VariadicTemplate<int, int, int, int,
int, int, int, int> v8;
Q_UNUSED(v0);
Q_UNUSED(v1);
Q_UNUSED(v8);
#endif
}
void tst_Compiler::cxx14_binary_literals()
{
#if __cpp_binary_literals-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
int i = 0b11001001;
QCOMPARE(i, 0xC9);
#endif
}
void tst_Compiler::cxx14_init_captures()
{
#if __cpp_init_captures-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
QCOMPARE([x = 42]() { return x; }(), 42);
#endif
}
void tst_Compiler::cxx14_generic_lambdas()
{
#if __cpp_generic_lambdas-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
auto identity = [](auto x) { return x; };
QCOMPARE(identity(42), 42);
QCOMPARE(identity(42U), 42U);
QCOMPARE(identity(42L), 42L);
#endif
}
#if __cpp_constexpr-0 >= 201304
constexpr int relaxedConstexpr(int i)
{
i *= 2;
i += 2;
return i;
}
#endif
void tst_Compiler::cxx14_constexpr()
{
#if __cpp_constexpr-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
QCOMPARE(relaxedConstexpr(0), 2);
QCOMPARE(relaxedConstexpr(2), 6);
#endif
}
void tst_Compiler::cxx14_decltype_auto()
{
#if __cpp_decltype_auto-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
QList<int> l;
l << 1;
decltype(auto) value = l[0];
value = 2;
QCOMPARE(l.at(0), 2);
#endif
}
#if __cpp_return_type_deduction >= 201304
auto returnTypeDeduction(bool choice)
{
if (choice)
return 1U;
return returnTypeDeduction(!choice);
}
#endif
void tst_Compiler::cxx14_return_type_deduction()
{
#if __cpp_return_type_deduction-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
QCOMPARE(returnTypeDeduction(false), 1U);
#endif
}
void tst_Compiler::cxx14_aggregate_nsdmi()
{
#if __cpp_aggregate_nsdmi-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
struct S { int i, j = i; };
S s = { 1 };
QCOMPARE(s.j, 1);
#endif
}
#if __cpp_variable_templates >= 201304
template <typename T> constexpr T variableTemplate = T(42);
#endif
void tst_Compiler::cxx14_variable_templates()
{
#if __cpp_variable_templates-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
QCOMPARE(variableTemplate<int>, 42);
QCOMPARE(variableTemplate<long>, 42L);
QCOMPARE(variableTemplate<unsigned>, 42U);
QCOMPARE(variableTemplate<unsigned long long>, 42ULL);
#endif
}
void tst_Compiler::runtimeArrays()
{
#if __cpp_runtime_arrays-0 < 201304
QSKIP("Compiler does not support this C++14 feature");
#else
int i[QRandomGenerator::global()->generate() & 0x1f];
Q_UNUSED(i);
#endif
}
QTEST_MAIN(tst_Compiler)
#include "tst_compiler.moc"
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