Template specialization involving Template class

[cajagu]

I have this template signature:

template<typename T>
TBool Foo(const T& aData)
{
}

The problem is providing template specializations for something which is already a template itself eg a TBuf.

We came up with this method which compiles and works for winscw but not armv5:

template<>
template <const TInt N>
inline TBool Foo<TBufC8<N> > (const TBufC8<N>& aData)
{
}

Error from compilation for armv5 is:

Error: #777: this declaration cannot have multiple "template <...>" clauses
inline TBool Foo<TBufC8<N> > (const TBufC8<N>& aData)

Any ideas anyone?

Thanks,

Chi

[mollevp]

Hi cajagu,
Use overloading:

template<const TInt N>
inline TBool Foo(const TBufC8<N>& aData)
{
}

But maybe you should consider using a specialization for TDesC instead.. Typically we pass descriptors by the base class i.e. TDesC or TDes.

// Morten

[cajagu]

Thanks Morten.

I do have a non-template overload of this function which takes TDesC but the compiler would always choose the template function which is why I wanted to provide a specialization for the different descriptors (at the bottom of the heirarchy)... I had already tried this method you suggested but there was an error: "illegal template declaration"

Chi

Hi cajagu,
Use overloading:

template<const TInt N>
inline TBool Foo(const TBufC8<N>& aData)
{
}

But maybe you should consider using a specialization for TDesC instead.. Typically we pass descriptors by the base class i.e. TDesC or TDes.

// Morten