diff options
| -rw-r--r-- | src/corelib/global/qglobal.h | 9 | ||||
| -rw-r--r-- | tests/auto/corelib/global/qglobal/tst_qglobal.cpp | 68 |
2 files changed, 77 insertions, 0 deletions
diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h index 5f8e6be893..ee601859b7 100644 --- a/src/corelib/global/qglobal.h +++ b/src/corelib/global/qglobal.h @@ -1785,6 +1785,15 @@ Q_CORE_EXPORT void qt_assert_x(const char *where, const char *what, const char * # endif #endif +// Intentionally undefined +template <bool Test> class QStaticAssertFailure; +template <> class QStaticAssertFailure<true> {}; + +#define Q_STATIC_ASSERT_PRIVATE_JOIN(A, B) Q_STATIC_ASSERT_PRIVATE_JOIN_IMPL(A, B) +#define Q_STATIC_ASSERT_PRIVATE_JOIN_IMPL(A, B) A ## B +#define Q_STATIC_ASSERT(...) \ + enum {Q_STATIC_ASSERT_PRIVATE_JOIN(q_static_assert_result, __LINE__) = sizeof(QStaticAssertFailure<bool(__VA_ARGS__)>)} + Q_CORE_EXPORT void qt_check_pointer(const char *, int); Q_CORE_EXPORT void qBadAlloc(); diff --git a/tests/auto/corelib/global/qglobal/tst_qglobal.cpp b/tests/auto/corelib/global/qglobal/tst_qglobal.cpp index 85aa03f642..9dc78a14c0 100644 --- a/tests/auto/corelib/global/qglobal/tst_qglobal.cpp +++ b/tests/auto/corelib/global/qglobal/tst_qglobal.cpp @@ -52,6 +52,7 @@ private slots: void qassert(); void qtry(); void checkptr(); + void qstaticassert(); }; void tst_QGlobal::qIsNull() @@ -267,5 +268,72 @@ void tst_QGlobal::checkptr() QCOMPARE(q_check_ptr(c), c); } +// Check Q_STATIC_ASSERT, It should compile +// note that, we are not able to test Q_STATIC_ASSERT(false), to do it manually someone has +// to replace expressions (in the asserts) one by one to false, and check if it breaks build. +class MyTrue +{ +public: + MyTrue() + { + Q_STATIC_ASSERT(true); + Q_STATIC_ASSERT(!false); + } + ~MyTrue() + { + Q_STATIC_ASSERT(true); + Q_STATIC_ASSERT(!false); + } + Q_STATIC_ASSERT(true); + Q_STATIC_ASSERT(!false); +}; + +struct MyExpresion +{ + void foo() + { + Q_STATIC_ASSERT(sizeof(MyTrue) > 0); + Q_STATIC_ASSERT(sizeof(MyTrue) > 0); + } +private: + Q_STATIC_ASSERT(sizeof(MyTrue) > 0); + Q_STATIC_ASSERT(sizeof(MyTrue) > 0); +}; + +struct TypeDef +{ + typedef int T; + Q_STATIC_ASSERT(sizeof(T)); +}; + +template<typename T1, typename T2> +struct Template +{ + static const bool True = true; + typedef typename T1::T DependentType; + Q_STATIC_ASSERT(True); + Q_STATIC_ASSERT(!!True); + Q_STATIC_ASSERT(sizeof(DependentType)); + Q_STATIC_ASSERT(!!sizeof(DependentType)); +}; + +struct MyTemplate +{ + Q_STATIC_ASSERT(Template<TypeDef, int>::True); + Q_STATIC_ASSERT(!!Template<TypeDef, int>::True); +}; + +void tst_QGlobal::qstaticassert() +{ + // Force compilation of these classes + MyTrue tmp1; + MyExpresion tmp2; + MyTemplate tmp3; + Q_UNUSED(tmp1); + Q_UNUSED(tmp2); + Q_UNUSED(tmp3); + QVERIFY(true); // if the test compiles it has passed. +} + QTEST_MAIN(tst_QGlobal) #include "tst_qglobal.moc" |