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AreArgumentsNarrowedBase: Correct logic for narrowing connect() casts

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The prior test deemed there to be narrowing if source and destination
integral-or-enum types didn't have the same signedness; but all values
of an unsigned source type can be represented in a larger signed
destination type, so there is no narrowing in this case.
Updated QObject test-case to match.

Change-Id: I517a5997adcad70e185d7469a8d26788e463cb75
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
This commit is contained in:
Edward Welbourne 2016-11-15 17:15:56 +01:00
parent be94fc445a
commit a32424b46c
2 changed files with 28 additions and 22 deletions
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10
src/corelib/kernel/qobjectdefs_impl.h
View File

@ -229,8 +229,14 @@ namespace QtPrivate {
(std::is_floating_point<From>::value && std::is_integral<To>::value) ||
(std::is_floating_point<From>::value && std::is_floating_point<To>::value && sizeof(From) > sizeof(To)) ||
((std::is_integral<From>::value || std::is_enum<From>::value) && std::is_floating_point<To>::value) ||
(std::is_integral<From>::value && std::is_integral<To>::value && (sizeof(From) > sizeof(To) || std::is_signed<From>::value != std::is_signed<To>::value)) ||
(std::is_enum<From>::value && std::is_integral<To>::value && (sizeof(From) > sizeof(To) || IsEnumUnderlyingTypeSigned<From>::value != std::is_signed<To>::value))
(std::is_integral<From>::value && std::is_integral<To>::value
&& (sizeof(From) > sizeof(To)
|| (std::is_signed<From>::value ? !std::is_signed<To>::value
: (std::is_signed<To>::value && sizeof(From) == sizeof(To))))) ||
(std::is_enum<From>::value && std::is_integral<To>::value
&& (sizeof(From) > sizeof(To)
|| (IsEnumUnderlyingTypeSigned<From>::value ? !std::is_signed<To>::value
: (std::is_signed<To>::value && sizeof(From) == sizeof(To)))))
>
{
};

40
tests/auto/corelib/kernel/qobject/tst_qobject.cpp
View File

@ -6969,10 +6969,10 @@ void tst_QObject::checkArgumentsForNarrowing()
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<signed char, unsigned long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned char, signed char>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned char, short>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned char, int>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned char, long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned char, long long>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<unsigned char, short>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<unsigned char, int>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<unsigned char, long>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<unsigned char, long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<short, unsigned short>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<short, unsigned int>::value));
@ -6980,23 +6980,23 @@ void tst_QObject::checkArgumentsForNarrowing()
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<short, unsigned long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned short, short>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned short, int>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned short, long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned short, long long>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<unsigned short, int>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<unsigned short, long>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<unsigned short, long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<int, unsigned int>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<int, unsigned long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<int, unsigned long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned int, int>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned int, long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned int, long long>::value));
QCOMPARE((QtPrivate::AreArgumentsNarrowedBase<unsigned int, long>::value), sizeof(int) >= sizeof(long));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<unsigned int, long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<long, unsigned long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<long, unsigned long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned long, long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned long, long long>::value));
QCOMPARE((QtPrivate::AreArgumentsNarrowedBase<unsigned long, long long>::value), sizeof(long) >= sizeof(long long));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<long long, unsigned long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<unsigned long long, long long>::value));
@ -7206,28 +7206,28 @@ void tst_QObject::checkArgumentsForNarrowing()
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByLongLong, unsigned long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, signed char>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, short>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, int>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, long long>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, short>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, int>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, long>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUChar, long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUShort, signed char>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUShort, short>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUShort, int>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUShort, long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUShort, long long>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUShort, int>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUShort, long>::value));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUShort, long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUInt, signed char>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUInt, short>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUInt, int>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUInt, long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUInt, long long>::value));
QCOMPARE((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUInt, long>::value), sizeof(ScopedEnumBackedByUInt) >= sizeof(long));
QVERIFY((!QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByUInt, long long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByULong, signed char>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByULong, short>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByULong, int>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByULong, long>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByULong, long long>::value));
QCOMPARE((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByULong, long long>::value), sizeof(ScopedEnumBackedByULong) >= sizeof(long long));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByULongLong, signed char>::value));
QVERIFY((QtPrivate::AreArgumentsNarrowedBase<ScopedEnumBackedByULongLong, short>::value));