Details
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Bug
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Resolution: Invalid
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P1: Critical
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None
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5.9.5
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None
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Ubuntu 18.04.2 LTS
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Linux/Other display system
Description
Qt version 5.9.5 on Ubuntu 18.04.2 LTS, compiling with g++ (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
The following code, using std::shared_ptr, works:
template<typename T> class ABase { }; template<typename T> class BDerived : public ABase<T> { }; class A { public: template<typename T> void f(std::shared_ptr<ABase<T>> x) { auto y = std::static_pointer_cast<BDerived<T>>(x); } };
The same code, using QSharedPointer, does not compile:
template<typename T> class ABase { }; template<typename T> class BDerived : public ABase<T> { }; class A { public: template<typename T> void f(QSharedPointer<ABase<T>> x) { auto y = x.staticCast<BDerived<T>>(); } };
It fails with:
In member function 'void A::f(QSharedPointer<ABase<T> >)': error: expected primary-expression before '>' token auto y = x.staticCast<BDerived<T>>();; error: expected primary-expression before ')' token auto y = x.staticCast<BDerived<T>>();
When function f() is rewritten as:
void f(QSharedPointer<ABase<int>> x) { auto y = x.staticCast<BDerived<int>>(); }
It does compile fine.