In article <ACCCFC90966811A2B6@corf.demon.co.uk>,
Sean A Corfield  <sean@corf.demon.co.uk> wrote:
>Templates can indeed be placed in namespaces. The current WP says that
>specialisations of such templates must also go inside the same namespace:
>

Can a namespace be a template argument?
ex:
template<namespace N> void f()
{
 N::Fast_real r;
 //...

>The other major issue which has an impact on templates & namespaces is name
>injection -- the committee are debating this subject at the moment.

What is name injection??

Thanks,
Atman Binstock
ajb@panix.com


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Can anyone tell me (hope this isn't a FAQ ...) what the status is on whether
templates can be placed in namespaces?  My understanding was this was a matter
of recent debate, with some compilers currently making all template definitions

global.  For my own part, I think it would be a sad decision to make template
definitions compulsorily global, and hence effectively downgrade template
definitions with respect to non-template definitions.
      Cheers,
        Tony.
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In article <481d4h$fr7@dingo.cc.uq.oz.au>,
Tony Coates <coates@mailbox.uq.oz.au> wrote:

|> Can anyone tell me (hope this isn't a FAQ ...) what the status is on
|> whether templates can be placed in namespaces?  My understanding was
|> this was a matter of recent debate, with some compilers currently
|> making all template definitions global.  For my own part, I think it
|> would be a sad decision to make template definitions compulsorily
|> global, and hence effectively downgrade template definitions with
|> respect to non-template definitions.

Templates can indeed be placed in namespaces. The current WP says that
specialisations of such templates must also go inside the same namespace:

  namespace Lib {
    template<typename T> class X { };
  }

  // must reopen namespace to define specialisation
  namespace Lib {
    template<> class X<int> { };
  }

[note: the example uses recently adopted syntax 'typename' as an
alternative to 'class' and 'template<>' to introduce a specialisation]

The other major issue which has an impact on templates & namespaces is name
injection -- the committee are debating this subject at the moment.

Sean A. Corfield
Object Consultancy Services -- voting member of X3J16
C++ - Beyond the ARM http://uptown.turnpike.net/~scorf/cplusext.html
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