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Burnce · Guest

Hi,

I have the following problem. I am writing a template class within a
template class. If I want to make a partial or complete spacialization of
the class within the class, I keep getting errors. Is my syntax wrong, or
is it impossible to do?

Consider this example:

///////////// Beginning of example /////////////

#include <iostream> using
namespace std;

template <typename Ta>
class A{
public:
void test();

template <typename Tb>
class B{
public:
void test();
};
protected:
B<Ta> b;
};

int main(){
A<int> aInt;
aInt.test();

A<char> aChar;
aChar.test();
return EXIT_SUCCESS;
}

template <typename Ta>
void A<Ta>::test(){
b.test();
}

template <typename Ta>
template <typename Tb>
void A<Ta>::B<Tb>::test(){
cout <<"This is a test"< }

template template <>
void A<Ta>::B<char>::test(){
cout <<"This is a char test"< }

//////////////// End of example ////////////////

In G++ I get the following output:

example.cc:39: error: invalid explicit specialization before '>' token
example.cc:39: error: enclosing class templates are not explicitly specialized
example.cc:40: error: no member function `test' declared in `A<Ta>::B<char>'
example.cc:40: error: invalid function declaration

If I remove the "template<>" line, I get:

example.cc:40: error: too few template parameter lists in declaration of
..... `void A<Ta>::B<char>::test()'example.cc:40: error: invalid use of
undefined type `class A<Ta>::B<char>' example.cc:10: error: declaration of
`class A<Ta>::B<char>' example.cc:40: error: template definition of
non-template `void A<Ta>::B<char>::test()'

Thanks for any help with this :)

Cheers,
Burnce

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Graeme Prentice · Guest

On 17 Jun 2005 06:25:05 -0400, Burnce wrote:

Ferdi Smit · Guest

"Burnce" <Burnce (AT) gmx (DOT) net> wrote