Function template problem

[globos]

Hi,

I want to use function template, and did something like this :
class Test
{
public:
template<class T>
void foo ()
{
}
};

int main ()
{
Test t;

t.foo<int> ();
return 0;
}

When compiling with VC++ 6.0, I get :
error C2062: type 'int' unexpected
But there are no compilation errors with g++.
Apparently, VC++ compiler does not understand explicit function template arguments.
How can I work around this problem?

--
Globos

 

[Cagliostro]

use a formal default parameter.

class Test
{
public:
void foo (template<class T>)
{
}
};

int main ()
{
Test t;

t.foo(int(0));
return 0;
}


Ion Filipski

ICQ: 95034075
AIM: IonFilipski
filipski@excite.com

 

[globos]

Thanks, it works(in your sample &quot;template&quot; def is not at the right place).
The compiler instantiates the appropriate function from the type of the actual parameter.
Does the VC++ .NET compiler accepts explicit function template arguments now?

--
Globos

 

[Cagliostro]

I do not believe

Ion Filipski

ICQ: 95034075
AIM: IonFilipski
filipski@excite.com

 

[chipperMDW]

It should; I've used it before on 6.0, but on functions with more than 0 arguments. I think maybe it was getting confused since you had a 0-argument function template. Such a thing makes perfect sense, and if it's not Standard it should be, but you gotta admit you don't see it every day, so maybe it got past MS's testers. I don't know if they've fixed that hiccup by now or not.

 

[Cagliostro]

I do not believe what it is a bug. Just Microsoft has not considered to introduce this feature.

Ion Filipski

ICQ: 95034075
AIM: IonFilipski
filipski@excite.com

 

[chipperMDW]

But why would they choose to implement it for functions with 1+ arguments but not with 0 arguments?

I took a quick look at the C++ Standard (well, the draft) and found no reason that 0-argument functions should be an exception.

I'd call that a bug. In Standard-compliance if nothing else.


If they didn't &quot;consider to introduce&quot; it, that means they forgot about it. Since it's part of the specification for C++ compilers, it should be there.

If I tell you to write a program that does X, Y, and Z, and you write a program that does X and Y, but you forget to do Z, you can't tell me the program is fine because you didn't &quot;consider to introduce&quot; Z.