[cfe-dev] Resolve an ambiguous template specialization

Dimitar Dobrev via cfe-dev cfe-dev at lists.llvm.org
Mon Nov 25 05:58:35 PST 2019

Hello all,

I have 2 methods in a C++ header.



I'm trying to compile this code:

template QSharedPointer<QTemporaryDir>::QSharedPointer(const 

I get "ambiguous template specialization".

include/QtCore/qsharedpointer_impl.h:330: candidates are: 
QSharedPointer<T>::QSharedPointer(const QSharedPointer<T>&) [with T = 
QTemporaryDir] QSharedPointer(const QSharedPointer &other) 
Q_DECL_NOTHROW : value(other.value), d(other.d)      ^~~~~~~~~~~~~~

note:                 template<class X> 
QSharedPointer<T>::QSharedPointer(const QSharedPointer<X>&) [with X = X; 
T = QTemporaryDir] QSharedPointer(const QSharedPointer<X> &other) 
Q_DECL_NOTHROW : value(other.value), d(other.d) ^~~~~~~~~~~~~~

I have 2 questions:

1. What syntax do I need in order to make my line of code unambiguous?

2. How do I make the difference in the Clang API between the two 
functions? Of course, I'm not talking about line numbers or names of 
type arguments but rather the specialization info, or the fact that the 
latter might be a function template etc.


Dimitar Dobrev

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