Re: [boost] Re: Proposal for easying smart_ptr usage within C++98

From: Peter Dimov (pdimov_at_[hidden])
Date: 2002-05-05 06:36:08

From: "Dietmar Kuehl" <dietmar_kuehl_at_[hidden]>
>    template <class SP> void f(SP p);
> 
> is, of course, inappropriate because it would be "catch all". A slight
> variation (thanks to Howard Hinnant for pointing out this technique in
> a different context) removes this "catch all" problem at the cost of
> writing a certain default argument:
> 
>    template <class SP> void f(SP p,
>                               typename is_ptr_shared<SP>::type = 0);

That's nice. Restricted templates possible, after all. ;-)