BUG with template instantiation

[Alexandre Oliva]

Philippe Lavoie writes:

> It seems egcs has problem with friend templates. The use of
> -fguiding-decls is odd, but at least things compile up to the
> following point.

-fguiding-decls breaks iostreams.  Write correct ANSI/ISO C++, by
adding the following declarations:

template <class T> class Fred;
template <class T> friend ostream& operator<<(ostream&, const Fred<T>&);
template <class T> friend istream& operator>>(istream&,       Fred<T>&);

Then, add `<>' when you refer to these template functions in friend
declarations.

> template<class T> class Fred
> {
> private:
>   T   i;
>//   friend ostream& operator<<( ostream& os, const Fred<T>& x );
>//   friend istream& operator>>( istream& is,       Fred<T>& x );
>   friend ostream& operator<< <>( ostream& os, const Fred<T>& x );
>   friend istream& operator>> <>( istream& is,       Fred<T>& x );
> };

-- 
Alexandre Oliva
mailto:oliva@dcc.unicamp.br mailto:aoliva@acm.org
http://www.dcc.unicamp.br/~oliva
Universidade Estadual de Campinas, SP, Brasil