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I cannot compile this:
template <typename T1=char,
template <typename, typename> class T2=std::basic_ifstream>
struct X {
T2<T1, std::char_traits<T1> > inputFileStream_;
T2<T1, std::char_traits<T1> >& UseInputFileStream() {
return inputFileStream_;
};
};

I get an internal compiler error with the function. Have I missed the word
typename anywhere? The compiler would probably accept code without typename
anyway. Is this a compiler bug?

Fraser.

Fraser Ross wrote:

> I cannot compile this:
> template <typename T1=char,
> template <typename, typename> class T2=std::basic_ifstream>
> struct X {
> T2<T1, std::char_traits<T1> > inputFileStream_;
> T2<T1, std::char_traits<T1> >& UseInputFileStream() {
> return inputFileStream_;
> };
> };
>

Compiles fine with g++ after adding #include<iostream>.


> I get an internal compiler error with the function. Have I missed the
> word
> typename anywhere? The compiler would probably accept code without
> typename
> anyway. Is this a compiler bug?

"Internal compiler error" usually says the compiler died on you. In my book,
that qualifies as a compiler bug.


Best

Kai-Uwe Bux

"Kai-Uwe Bux"
> "Internal compiler error" usually says the compiler died on you. In my
book,
> that qualifies as a compiler bug.

Thats what I said too. I've had to put a workaround in my class templates.

I was wondering why std::vector for instance has an allocator as a type
parameter and not a template template parameter. Is it merely because
template template parameters were not in the language or weren't widely
supported?

Fraser.