templates

[Adrian Sandor]

let's say I have a simple template function:

template<class T>T sqr(T x){return x*x;}

then if I write "sqr(5)" then everything is ok
but if I make some changes:

template<class T>struct dummy{typedef T type;};
template<class T>T sqr(typename dummy<T>::type
x){return x*x;}

then "sqr(5)" doesn't compile anymore; instead I have
to write "sqr<int>(5)"
what is the cause of this behaviour and how can I
avoid it? (I need to use some type traits)

thanks
Adrian

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