Re: specialize a template function out of its namespace

[Daniel Lohmann <daniel dot lohmann at informatik dot uni-erlangen dot de>]

On 03.06.2008, at 07:26, Yunior Peralta González wrote:

> Hi all.
>
> I have the following problem:
>
> namespace test
> {
>    class A
>    {
>        template <typename T>
>        void foo(T &);
>    };
> }
>
> //specialize the function out of namespace test
> template <> test::A::foo<int>(int & a)
> {
>    //do something with a
> }
>
> if on the contrary I put it this way:
>
> namespace test
> {
>    class A
>    {
>        template <typename T>
>        void foo(T &);
>    };
>
>    //specialize the function inside namespace test
>    template <> A::foo<int> (int & a)
>    {
>        //do something with a
>    }
> }
>
> it works ok.
>
> How can I use the first form without errors?

You just can't...
which is sometimes a pain (e.g., for generating code by macros), but  
thats how C++ is.

Daniel