Why this does not compile?

[Marcin Kalicinski]

Why this does not compile (gcc 3.4.2 and latest Comeau):

struct A
{
template<class T>
T f(int a)
{
return T(a);
}
};

template<class T>
double g()
{
T t;
return t.f<double>(3); // <-- here
}

int main()
{
g<A>();
}

In the marked place gcc says "error: expected primary-expression before
double".

cheers,
Marcin

 

[Andrey Tarasevich]

Why this does not compile (gcc 3.4.2 and latest Comeau):

struct A
{
template<class T>
T f(int a)
{
return T(a);
}
};

template<class T>
double g()
{
T t;
return t.f<double>(3); // <-- here
}

int main()
{
g<A>();
}

In the marked place gcc says "error: expected primary-expression before
double".
...

Template members of dependent types have to be referred to with the explicit use
of keyword 'template'

template<class T>
double g()
{
T t;
return t.template f<double>(3);
}

 

[Marcin Kalicinski]

Template members of dependent types have to be referred to with the

explicit use
of keyword 'template'

template<class T>
double g()
{
T t;
return t.template f<double>(3);
}

Thanks, that was quick!

Best regards,
Marcin

 

[Greg Comeau]

Why this does not compile (gcc 3.4.2 and latest Comeau):

struct A
{
template<class T>
T f(int a)
{
return T(a);
}
};

template<class T>
double g()
{
T t;
return t.f<double>(3); // <-- here
}

int main()
{
g<A>();
}

In the marked place gcc says "error: expected primary-expression before
double".

Check out http://www.comeaucomputing.com/techtalk/templates/#templateprefix